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Discover the ultimate comfort and performance with our men's lightweight base layer collection. Designed for optimal breathability and moisture-wicking, these base layers keep you dry and comfortable during any activity. Perfect for layering, they provide a snug fit without adding bulk, making them ideal for outdoor adventures or workouts. Crafted from soft, durable materials, our lightweight base layers ensure freedom of movement while regulating body temperature. Elevate your activewear essentials and experience the perfect blend of functionality and style.
$60.00
Each of the Cold Gear Base Layers, base layer, base layer 2. 0 and base layer 3. 0 are great. ... fit fitted baselayer technology ua base™ 2. 0 active baselayer is lightweight, flexible, and breathable for high...
5
Micheile
Feels great keeps you warm
5
NHummingbird
Very comfortable and good for mild to moderate cold weather. I would recommend
5
Brian31
This 2. 0 is comfortable and warm. Perfect baselayer to shred the slopes with. Wicks moisture as advertised. Awesome shirt
5
Jeff H 150
Great fit and very comfortable. Very warm when out in the elements but not too hot while working inside. Would definitely buy another one.
5
Kpax1
This base layer is warm, comfortable and lightweight.
$130.00
Again, very well made and warm. ... Inside and outdoors, it's a great layer to be wearing. ... I no longer have to wear multiple layers underneath a uniform to stay
5
Peter
[ The Smartwool Men ’s Intraknit Thermal Merino Base Layer performs as described. In addition, it is not at all itchy, yet warm and comfortable.
5
Pflan
[ Comfort, comfort, comfort and warmth. Fit perfectly. Nice and snug Now that I have a pair I won ’ t ever go without. Buying additional colors now.
5
Kimmer13
[ The base layers I bought were too thick so I sent them back and ordered another set. They notified me immediately my return had been received and the refund quickly followed. Great prices!
5
SeanT
[ Perfect fit and super soft! But these as a base layer and will be what I wear going forward. I also have two Smartwool tops that are amazing!
4
Zeejet
[ An excellent product with a compromise between the benefits/draw- back of PE and merino fabrics. My main criticism is the extremely high- cut waist that rides all the way up to the belly button. It should be about two inches shorter than it currently is. Fit( Men 's Medium): Great in the legs but unusually high waist band. I 'm 5' 9 '', 165lb, 31 '' Waist, Climber 's Build. Pros:+ Excellent wicking and drying times+ Warm+ Quality build Cons:- Unusual cut and fit at the waist- While already very soft to the touch, just a tad coarse compared to Icebreakers products.
$39.99
I bought this to wear skiing in Tahoe and it kept me nice and warm in 20 degree weather. ... They were soft and comfortable enough to wear around the base of the mountain when not skiing, and they kept me warm when was doing down the
5
Meals
Bought these specifically to wear while skiing in the Rockies in Colorado in January. They were soft and comfortable enough to wear around the base of the mountain when not skiing, and they kept me warm when was doing down the slopes. Have no complaints about this shirt. It was perfect
5
CHutson
I bought this to wear skiing in Tahoe and it kept me nice and warm in 20 degree weather. I love how the back is longer and doesn ’ t ride up.
4
Zephyr TX
I bought this for my teen to use as a base layer for skiing and sledding. It kept him dry and warm and fit him well. I bought a duofold base later too too and liked the duo fold a little better as far as stitch quality and material quality and the duofold material seemed a little thicker but I ’ m keeping this one too.
$90.00
This will be a great base layer for cold weather and great outer layer when the temps are cool or warmer. ... Awesome base layer ... Very happy with the layer, and more happy that it fits true to
5
mwo131313
If you need a high- performance base layer for extreme cold, the UA Base 4. 0 ¼ Zip is one of the best options out there. Just bought my second one.
5
M2024
Great base layer, warm and comfortable
5
Jasonwithg
Good quality nice and warm
5
JKT91
amazingly, surprisingly warm.
5
Bearbabe
I work outside, and this 1/4 zip is my go to when the temp drops. I think I have 5 of them now... one for every day!
$115.00
slim fit 100% merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance fit updated to improve functionality while enhancing aesthetics shoulder panels eliminate top shoulder seams flatlock seam construction designed to minimize...
$34.99
Good fit ... Very good quality product highly recommend! ... My son loves them! ... machine wash with cold ... dry® wicks away sweat rugged flex® moves with you fights
$159.99
Quick delivery, charges great, and heats up quickly. ... He was very impressed with the smaller flat battery. ... It keeps me so warm and cozy and I couldn ’ t imagine life without it
5
Renee
You don ’ t realize how much you need a heated base layer until you have one! It ’s been such a benefit to various aspects of my life. I wear it beneath my layers when spending time outdoors during winter in Wisconsin. But I ’ ve also worn it to work( in an office) during especially cold days. It fits true to size and is comfy. Somehow it seems to trap heat inside yet it ’s also breathable, I don ’ t sweat in it like I have with other base layers.
5
The Base Layer Shirt takes the bite out of any cold day! And the battery last for hours! Washed it in a cold wash then hung it to dry, easy peesey! Definitely worth it!
5
I bought the base layer for my son who works at Disneyland in Anaheim Ca. and he loves it. Keeps hos 3X body warm when working nights. Great product
5
GLWS
Just wearing the shirt and not on has been enough to keep me warm. The few times I have used the heat, I set it on lthe lowest setting and was plenty warm.
5
Luke B
Definitely worth having extra battery banks if you ’ re skiing all day or anything like that, also could use an extra hole in the battery pouch so you can route the cable to a pant pocket more easily. Besides that, it definitely lasts through the wash and multiple winters
$90.00
I was surprised how thin and lightweight this shirt was: not transparent, but not opaque, either. ... Love the fit and breathability, a bit less wool and more synthetic than other brands I wear, but it works for me since this is a hiking base layer that I wear multiple times...
5
Gandhi
[ Bought for a hiking baselayer. Expensive but I think its worth it. More comfy in the cold than a synthetic baselayer. Not a compression shirt. I use under a fleece. Does n't smell after a full day of hiking.
5
Jackie28
[ This is my second purchase of a Smartwool Men 's Classic All- Season Merino LS Base Layer- this is a great lighter weight item that breathes well but is warm enough when it gets cooler.
5
Rover Dog
[ I own several Smartwool tops but this is one of my favorites. The slightly heavier material is ideal for stand alone yet still layers nicely. Never bulky. Quality is what you would expect from Smartwool. Excellent.
5
Tony99
[ I have tried more than one brand of merino tops Keep coming back to smart wool for best quality and fit. They also keep their shape. The price is inline with other brands
5
Thunderbolt417
[ I 've long been an unabashed devotee of all Smartwool products but their base layers, like the classic all- season merino long sleeve shirt, is truly the best money can buy. Since my days of living in the frigid mountains of northern Utah, I 've discovered the breathability of Smartwool 's all- season merino long sleeve base layer makes it both the perfect shirt for keeping warm on winter 's coldest days as well as ideal workout apparel. Smartwool base layers also make the best all- season pajamas imaginable. The all- season merino long sleeve shirt feels like a gentle hug when you slip it on, and remains comfortable until you 've completed your workout — whether it be a 3- mile hike in the frigid cold or a home gym weight training session. Smartwool has long been the gold standard for merino wool apparel. When you purchase your first Smartwool product, you 'll understand why.
$85.00
WAS: $90.00*
lightweight merino jersey fabric uses a nylon core to increase durability while still keeping 100% merino wool next to skin go far. ... Solid base layer ... I am a 5' 5 '' tall woman and bought a men's small which fits
$85.00
with core spun technology, smartwool has wrapped lightweight merino around a nylon core for added durability, while still keeping the comfort of ultra- soft, responsibly- sourced merino next to
5
MAJB
Great quality, ordered for my husband for Christmas. He loved it... would order again.
$19.99
these two- layer thermal bottoms provide warmth in cold conditions and make a great first layer when you really need to bundle up. ... two- layer thermal for warmth in cold weather flatlock seams to avoid irritation front fly lower leg cuffs...
5
jman151
I bought this for a snowboarding trip in Colorado. Excellent product. Kept me warm in the mountain.
5
IslanderAC
Fits true to size. Does the job in maybe 50- 60⁰ weather to keep your legs warm.
5
Ebaker187
Kept me warm on a 3 hour winter hike! It was about 25- 30 degrees out too.
5
Michael 7
I bought these to wear on those cold days on the golf course. Excellent purchase. Works as designed.
5
AkScott
I took the Duofold pants with me on a three week visit to a cool place. I went out on hour and a half to two hour hikes in temps from 30 to 45 degrees. My legs stayed warm even on rainy days.
$65.00
slim fit golf baselayer mock neck for additional coverage body mapped mesh inserts under arms provides ventilation where you need it long sleeves lightweight fabric breathes when it ’s warm and warms when it ’s cool for all- weather versatility 3- stripes on both
$159.99
The warmth is good for me ... I usually love blasting the AC and can still wear these pants for the perfect balance. ... Love the warmth on my thighs and back. ... Really warm pair of pants and an awesome
5
Ashley
I bought these for my husband as his job requires him to be outside in cold temperatures and they were worth every dollar spent. I highly recommend everything this company has to offer 😊
5
Crystal
Worked great! Downside is, I can ’ t use normal base layers now.
5
Jay Maine
I purchased these for hunting. They worked great!!!
5
DandySandy
I like these but the heat is only in one area and I wish it covered more areas
5
Keith B
I have n't turned them on yet but the fit is perfect.
$120.00
merino sport yarn provides durability and fast dry times of polyester ... slim fit to follow contours of the body 3d mapping results in near custom fit and movement freedom seamlessly knit mesh ventilation designed to keep you dry and comfortable size medium inseam: 21. 5
$115.00
I love the base layer line of Smartwool. ... love the thin layer and wool is not itchy ... My son loves wearing thermal bottoms for skiing. ... Keep me warm in the mornings as I 'm putting gear on, stays cool as I skin up the
5
Wesley on the Rocks
[ I highly recommend these for all of your snow adventures. I wear mine directly under my snow pants and they work perfectly for warmth and movement. This base layer helped me survive snowboarding in both Colorado and Canada. Buy a pair, its worth every penny!
5
Jordan
[ I ’ ve worn this pair of wool pants as a base layer a couple of times in the snow and stayed warm. They fit and feel great! I definitely recommend!
5
Joe1
[ Bought two pairs of these for a snow trip. Great feel and regulated temp perfect. Alternated the pairs and neither smelled after solid week+ of use.
5
Littlemisstexas
[ Purchased this for someone. They gave a thumbs up. I personally own a pair of women ’s smart wool. Money well spent. They last a long time, and they ’ re as comfortable as it gets.
5
Chris K
[ I bought this base layer bottom for a ski trip to Colorado. This did a great job keeping me warm in the cold mornings and wicking sweat away in the warmer afternoons.
$80.00
our lightest, most breathable performance tank featuring cool- lite™ eyelet mesh throughout, the merino 125 cool- lite™ speed short sleeve t- shirt is ideal for running and any other high- intensity pursuits in warm conditions cool- lite™- breathable and lightweight fabric blend...
5
Alex
[ I got two of these for daily undershirts. It is very comfortable and of excellent quality, a little baggier than expected.
$60.00
fit fitted baselayer leggings inseam: 30 1/2 ” technology ua base™ 2. 0 active baselayer is lightweight, flexible, and breathable for high activity performance in cool conditions moisture transport system wicks sweat and dries quickly ua scent control prevents the growth of odor...
5
Tracey2020
These under armor thermals are a family favorite.
5
Mcdavid97
The base layer fit comfortably nice and snug. It kept me very warm as I was skating out in the cold winter weather.
5
Jdog523
I 've been wearing under my pants and they 've kept me warm during 0 degree weather
5
Avery111
These are great for my winter garage workouts. Slim layer fit really well under joggers. I always size up for tights and they fit nicely. Great amount of stretch, which I really need as a dancer.
5
LP25
Bought these for my husband and he loves them. He has a couple 3. 0 sets and has worm then for a least 6 years. They wear great.
$130.00
slim fit merino sport yarn combines the power of merino with the durability and fast dry times of polyester seamlessly knit mesh ventilation designed to keep you dry and comfortable 3d mapping provides maximum mobility while ribbed elbows provide added durability lightweight,...
$24.99
pruf base layer pants 2- layer engineering traps air between layers to create barrier of warmth tagless design and flat seams for itch and chafe free wear ribbed cuffs for added protection comfort waistband gussets and front and back rise for...
5
Lynn2025
I bought these for my son. He wears them every day and they keep him warm.
5
YOYO90
I love them they are thin not heavy for laying a must buy brand if you want thicker and warmer thermal get the same brand in expedition version military fleeced ok.
5
Johnox
Keeps me warm don ’ t need a lot of clothing on when hunting with its thin material
5
skiellen
Bought these for skiing to go under ski pants and worked well. Less expensive than most but did the trick. They do run large however. Large was huge!!! We ended up with a small for my son.
5
Socker mom1
Great product at a good price. We need to buy the shirt.
$86.97
WAS: $165.00*
introducing the lukas midlayer, perfect for golf in seasonal color- blocked bridge panels soft, comfortable fabric with 4- way stretch moisture- wicking and fast drying brushed inside for comfort and warmth quarter zip rounded silicone bridge logo at chest and
$80.00
If I wanted a lightweight base layer for, say, the Ghost Shadow Hoody synthetic down jacket, it ’s an excellent pairing. ... It's a great base layer and good for cool/cold weather
5
E Rubble
Reviewing this from the POV of an end user& tech fabric geek. Love the materials of the MH AirMesh. Already have the hoody; just bought the crew. Agree w/ those who say it 's very warm when at standstill or w/ a wind layer over top, yet while moving or with wind and no wind layer it 's like being naked. To me that says the fabric is functioning precisely how a base layer shoulder. Only con is hypothetical: delicate fabric. I 've had no issues with snags, pilling, abrasion, etc. But I would n't be surprised were I to, given the softness of the fibers and the openness of the fabric they 're arranged into. Cut/fit are unremarkable w/ exception of the somewhat high neck hole and the different accent fabric used there. Packs tiny, resilient fibers bounce back into shape immediately. Most comparable to the Patagonia Cap Air wool base layer, minus the itchiness/roughness and the ultra premium price point. Also, like Polartec Power Stretch pro, but much lighter and more airy fabric, fwiw.
5
Friestadt
I recently purchased a red version of the AirMesh. I find it incredibly warm for its weight. Packs down to nothing which is very helpful.
5
Ruff Ruff
[ My daughter bought me this shirt last year for my 90th birthday. In hot weather or cool temps it seems to trap the air and is the perfect shirt. I have gotten 3 more in sundry colors for myself, one for my wife, and a crew neck airmesh for my adult son.
5
Evan
In the first image, it is very light and breathable, but the fibers inside seem to be easily lost, and there are some fibers in the hand after a little scratch. I am 167cm tall and my bust is 98cm, so I wear a size M which is very comfortable. I bought 2 at the same time, for me it should be good for sweating a lot without losing warmth. I tried wearing it the other way around and it was a different feeling, like a normal sweatshirt. A very special piece of clothing, worth trying. When washing, do n't turn it around, it 's better to put it in a laundry bag
5
JP
Love this shirt. Wear it all the time and have already ordered another one- so comfortable. If they eventually make a short sleeved version I 'll buy that, too. It 's a great base layer and good for cool/cold weather chillin'. Be aware that there is zero wind blocking- it 's a mesh fabric- you must have a shell if you 're hiking/skiing/walking to mailbox. That said- I 've hiked in 15- 20F with wind and just this base and a heavy shell no problem. Note: It 's very `` roomy ''. Great for me, but if you 're a bean pole you may be swimming in it- think about that when selecting sizes.
$135.00
slim fit to follow contours of the body made with merino sport yarn: combines durability and fast dry times of polyester seamlessly knit mesh ventilation designed to keep you dry and comfortable 3d mapping provides maximum mobility merino wool helps with moisture management, temperature control and...
$130.00
slim fit to follow contours of the body made with merino sport yarn: combines durability and fast dry times of polyester seamlessly knit mesh ventilation designed to keep you dry and comfortable 3d mapping provides maximum mobility ribbed elbows provide added durability mesh zones for better...
5
LPaul
[ I was looking for wool thermal layer for my husband, who runs cold. Rather than settling on a bland look, I chose this colorblock version for its added style. While he does n't fill it out quite as nicely as the model(!), he looks great in it.
5
rahoran53
[ I bought the Smartwool to keep me warm and comfortable on a 12 day trek in Nepal. The performance was outstanding and, as advertised, it was very breathable to keep me warm and even cool in the afternoons. It has a very comfortable feel and looks great as well.
$100.00
This base layer fits quite well and adds noticeable warmth to my outdoor gear during the winter. ... Base layer kept me warm all day on mountain winter hikes in the
5
Jeff1540
If you play cold weather golf you really need to get the UA Cold Gear product. I like it because it ’s flexible and fairly warm.
5
Prof13
My Under Armour- UA Base 4. 0 XL fits perfectly. The waiste band is comfortable. The fabric is a great barrier to the damp cold air near Lake Michigan as I watch my son ’s Zion Benton High School ’s Varsity baseball games.
5
MattB13
Very warm. Different than the old waffle style. But they still work just the same.
5
Amazing pair of pants
I work outside. And theses pants are amazing.
5
Great material. Fits like a glove. Perfect for cold weather. True to size.
$120.00
This is a great base layer for my walks to and from work. ... Excels as a base layer, size up if you want a shirt ... My husband loves them for an extra layer all fall, winter, and
5
Raymond
[ Bought on sale great value. Love the quality of Smart Wool products.
5
Stylish all around shorts
[ Only recently became aware of Smartwool, saw this quarter zip, and love it! Fits well. Looks good. Very useful base wool layer. Now a fan of Smarwool.
5
Rancher
[ Smartwool has mastered the 1/4 zip merino base layer. I 've owned these for years and they never disappoint. Once the temp is below 20 degrees, I have one on every day. Perfect weight, perfect fit.
5
LeoK
[ I recently had the opportunity to try out the Smartwool Men 's Classic Thermal Merino Base Layer 1/4 Zip, and I must say, it quickly became one of my favorite pieces of outdoor clothing. First and foremost, the quality of the merino wool used in this base layer is exceptional. The fabric is incredibly soft and comfortable against the skin, and it provides excellent insulation and warmth. I was impressed by how well it regulated my body temperature, keeping me warm in colder conditions and preventing overheating during more active pursuits. The natural moisture- wicking properties of merino wool also kept me dry and comfortable throughout my outdoor activities. The 1/4 zip design of this base layer is a great feature. It allows for easy ventilation and temperature control, especially during strenuous activities when you need to quickly release excess heat. The zipper is smooth and durable, and the collar provides added protection and warmth for the neck area. I found the fit of this base layer to be spot on. The slim yet stretchy design contours to the body without feeling restrictive, allowing for a full range of motion. The sleeves are the perfect length, and the shirt stays in place even during active movements. The overall construction feels solid, with flatlock seams that minimize chafing and enhance comfort. One of the standout features of this base layer is its odor resistance. Merino wool naturally has antimicrobial properties, meaning it inhibits the growth of odor- causing bacteria. Even after multiple days of use, the shirt remained fresh and odor- free, making it an excellent choice for multi- day hikes or backpacking trips when laundry facilities may be limited. Durability- wise, the Smartwool Men 's Classic Thermal Merino Base Layer is impressive. The merino wool is robust and resistant to pilling, ensuring that the shirt maintains its quality and appearance even after repeated use and washes. I appreciated that it retained its shape and did n't stretch out over time. In terms of improvements, I would have liked to see a small zippered pocket or a media port for storing small essentials or routing headphone cables. This would have added convenience for those who like to listen to music or carry small items while on the move. Overall, the Smartwool Men 's Classic Thermal Merino Base Layer 1/4 Zip exceeded my expectations in terms of comfort, performance, and durability. It is a versatile and reliable piece of outdoor clothing that provides excellent insulation, temperature regulation, and odor resistance. Whether you 're hiking, skiing, or engaging in any cold- weather activity, this base layer is a worthy investment that will keep you warm, dry, and comfortable throughout your adventures.
5
PDXPirate
[ I ’ ve worn them all. But smartwool has it figured out. They are the best in the business for warmer base layers. I literally wear the crew neck with a 1/4 zip under my uniform. It provides supreme warmth, breathable base, and keeps you dry. And these are flat out durable.
$90.00
side seams help minimize chafing while wearing a pack and offer a body- enhancing fit. ... this top uses their lightest- weight merino fabric wrapped around a nylon core to increase durability, while still keeping the 100% soft, merino wool you love next to
$85.00
a year- round favorite, the classic all- season merino base layer bottoms work hard to keep you comfortable everywhere, from the ski lifts to the
$100.00
Love the fabric and the fit is a bit baggy in a good way. ... Simple and trendy, wear anywhere shirt! ... Shirt appears larger than expected at first, after first cold water wash, no dryer hang dry, fits as
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
5
FunkyCity
[ My dad loves these shirts and is a committed fan! Thanks Icebreaker
$85.00
They fit like a classic T- shirt, do n't wrinkle, itch or stink. ... Super soft shirt that helps keep cool in the summer heat. ... Very comfortable and not itchy ... Highly recommend if you are looking for a warm weather shirt that can be work into the office or on a hike/long
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
5
FunkyCity
[ My dad loves these shirts and is a committed fan! Thanks Icebreaker
$85.00
The Small was spot on in every aspect. ... These shirts are ultra comfortable and can be worn as an undershirt or a T- shirt, sporting attractive graphics. ... Fantastic shirt for the intended purpose of repeated wears before
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
5
FunkyCity
[ My dad loves these shirts and is a committed fan! Thanks Icebreaker
$36.00
quad- blend fabric technology allows heat retention to keep you warm ... relaxed fit pants ultra- soft brushed interior offers all- day comfort and warmth true comfort stretch for ease of movement non- deforming design helps hold the shape tag- free design provides a fuss- free
$85.00
`` enjoy the adaptable durability of the nike trail line in this layer- ready pullover. ... fit& design regular fit running top mock neck with 1/2 zip design long sleeves thumbholes let you extend your coverage and help hold the sleeves in place soft and stretchy poly- wool blend fabric has a...
5
3dyers
Love this half zip top! I know it ’s men ’s ’ but I ordered it in a small and it fits perfectly! Very comfortable material and lightweight, perfect for running errands! I wish there were some brighter color ways other than the light blue, but definitely thinking of getting the maroon one as well!
5
charlesp772116876
This thing is too good. Perfect for cool days with big climbs. Fully unzip and roll the sleeves up on the way up and then zip back up and roll the sleeves down for the way down.
$85.00
The best summer base layer you can buy ... breathable and lightweight cool- lite fabric blend is designed to help keep you cool offset shoulder seams to prevent friction droptail hem for added coverage side splits at hem for added ventilation and
5
AP
[ Nice casual soft base layer. Very thin and lightweight. Nice color and decent price on sale.
5
PB
[ This is a great shirt. Super soft and light. Great for travel and as a base layer for chili days or evenings. The only gripe is that I bought one of these a year ago, size large. When I bought the most recent one the large was now too tight. So I bought an extra large. Body fit is now great but sleeves are long!!
5
Al
[ I bought 2- 3 yearly of these type since 2017 and almost all of my techs shirts are now IB. i tried a different branD and i still come back for Icebreaker* I need to buy more and plan to use these on my TMB( Chamonix) 10 day hike in Aug /2025
5
RK
[ Great quality as always with Icebreaker. I use this shirt for Summer outings to avoid using too much sunscreen, yet keeps me cool enough.
5
Val
[ I have 2 previous versions sphere ii long sleeve t shirts that I wear on summer hike. I like them even if their material is not strong enough for hiking trips. one of them have a few small holes after laundry. this version seems to be stronger because material is thicker. another difference is sizing. I need M size in contrast of S size from previous version.
$30.00
performance fit pants brushed interior fabric offers all- day comfort and warmth body contouring design for great shape tag- free design provides a fuss- free
$85.00
It's the words greatest super shirt. ... Awesome shirt ... But they 're perfect. ... Not literally, but they do last a long time and look/feel great. ... They 're perfect. ...
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
Mark G
I ’ ve used this shirt for touring this spring. It ’s kept me dry, cool and comfortable the whole way! I ’ m 5 ’ 11 ” and 170lbs and went with the medium which fits me well( not tight) but the sleeves feel a little short compared to my other shirts. I was leery of the passion color at first based on the photos but love the color in person now!
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
$85.00
classic fit t- shirt to wear on any adventure you can think of soft merino fibers regulate body temperature in all weather conditions and naturally resist odors offset shoulder seams prevent friction graphic on front
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
5
FunkyCity
[ My dad loves these shirts and is a committed fan! Thanks Icebreaker
$85.00
Look forward to adding other colors to the collection. ... Standard merino wool, does n't stink, leave it to air out and it's fine. ... High Quality Everyday
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
5
FunkyCity
[ My dad loves these shirts and is a committed fan! Thanks Icebreaker
$85.00
Same magnificent quality, fit, and
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
5
FunkyCity
[ My dad loves these shirts and is a committed fan! Thanks Icebreaker
$95.00
machine wash ... soft merino fibers regulate body temperature in all weather conditions and naturally resist odors offset shoulder seams prevent friction shirt can be worn tucked or untucked screen printed graphic at
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
5
FunkyCity
[ My dad loves these shirts and is a committed fan! Thanks Icebreaker
$80.00
our most versatile tech t- shirt that provides comfort, breathability and odor- resistance for four seasons' worth of adventure 100% merino fibers regulate body temperature and naturally resist odor regular fit; can be worn by itself or over other
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
5
FunkyCity
[ My dad loves these shirts and is a committed fan! Thanks Icebreaker
$85.00
versatile tech tee that provides comfort, breathability and natural odor- resistance for any adventure you can think of soft merino fibers regulate body temperature in all weather conditions and naturally resist odor offset shoulder seams to prevent
5
Aaron
[ Shirt is mostly as expected, soft and breathable, and odor resistant. I do wish the shirt was a little thicker so it 's less see- through( which would hopefully also help with making it more durable)
5
JG
[ The Merino Tech Lite II Short Sleeve T- Shirt is hands down one of the best t- shirts I 've owned. It 's lightweight, soft, and super versatile, making it perfect for everything from hiking to casual wear. Why I Love It: ✔ Soft& Comfortable- No itch, just smooth merino that feels great against the skin. ✔ Breathable& Moisture- Wicking- Stays cool in warm weather and dries quickly. ✔ Odor- Resistant- Worn it multiple times between washes, and it still smells fresh. ✔ Great Fit& Versatility- Works well as a standalone tee or a base layer. A Couple of Considerations: ⚠ Fabric is lightweight, so be mindful of snags. ⚠ A bit pricey, but the quality and durability make it worth it. If you 're looking for a high- quality merino t- shirt that 's comfortable, breathable, and perfect for any occasion, this one 's a winner. I 'll definitely be buying more!
5
Dee
[ Just reviewed the long sleeve base layer, and like both of these tops. Since it is still winter in Colorado, I have been wearing the short sleeve T- shirt on the 65 degree days we sometimes have. I also like to wear the men 's as opposed to the ladies for the looser fit.
5
Geoff
[ I love these icebreaker shirts. I own several in different colors, prints, etc. Very breathable and comfortable. No chafing or scratching on my chest. I 've had issues with other Mfg products on this front. With good care I 've found these to last a while( i. e. line dry only).
5
FunkyCity
[ My dad loves these shirts and is a committed fan! Thanks Icebreaker
$75.00
Great lightweight merino for summer ... lightweight and breathable cool- lite fabric blend is designed to wick moisture away from the body side splits at hem for added ventilation and mobility offset shoulder seams to prevent friction droptail hem for added
5
Amir
[ I 'm really impressed with this T- shirt. The quality is top- notch, the fabric feels incredibly soft, and the fit is just right. it hugs the body without being too tight. It definitely complements my look, especially when I 'm at the gym. If you want a shirt that looks good, feels good, and holds up well, this one 's a solid pick.
5
Steve
[ This is my new favorite base t- shirt. It works great layering and can stand on its own!
5
Don Vogel
[ I hope Icebreaker makes more shirts like this, it has a bit of a tail that stays tucked into my pants. If I could find more on your website, I would buy a lot more. I buy almost all my shirts from Icebreaker!
5
JG
[ The Merino Blend 125 Cool- Lite™ Sphere Short Sleeve T- Shirt is easily one of the best t- shirts I 've owned. It 's soft, breathable, and perfect for warm weather or layering under a jacket. What I Love: ✔ Lightweight& Comfortable- The Cool- Lite™ fabric feels soft, never itchy, and is great for all- day wear. ✔ Breathable& Moisture- Wicking- Keeps me cool, dries quickly, and does n't get sticky, even in humid conditions. ✔ Odor- Resistant- I 've worn it multiple times without washing, and it still smells fresh- perfect for travel. ✔ Versatile Fit- Works great for hiking, workouts, or casual wear. Looks good enough to wear anywhere. A Few Things to Note: ⚠ The fabric is delicate, so avoid rough surfaces to prevent snags. ⚠ It 's not the cheapest, but the comfort and performance are worth it. If you 're looking for a lightweight, breathable, and high- quality merino blend t- shirt, this one is a great choice. I 'll definitely be getting more!
5
KP
[ Love this shirt. It 's so comfortable and breathable. It is pretty lightweight so not the most durable.
$180.00
cool- light™ fabric blend is designed to wick moisture away from the body to keep you fresh and comfortable ... fitted hood raglan sleeve construction at front for mobility set in sleeves at back with offset shoulder seams to prevent friction thumb loops to keep your sleeves in place and hands warm...
5
Fred
[ Bought this as I return to biking after a decade- long break. Love the feel, almost like you 're not wearing anything. And I appreciate the SPF 30 rating.
4
Big V
[ Love everything about this product, it is soft, and great. It is a little thinner than I would like but perfect for 60 ish degree weather. The probelm is that I do n't like the raglan sleeves. They make it feel unantural.
$80.00
I wear these year round, great base layer, great for travel. ... soft, comfortable and versatile t- shirt for a wide variety of active pursuits features our breathable cool- lite™ breathable and lightweight fabric blend designed to help keep you cool and odor- free...
5
Sc
[ I wear these year round, great base layer, great for travel. Very comfortable.
$80.00
soft, comfortable and versatile t- shirt for a wide variety of active pursuits features our breathable cool- lite™ breathable and lightweight fabric blend designed to help keep you cool and odor- free offset shoulder seams help prevent friction drop tail gives you added coverage...
5
Jack
[ I wear this shirt to workout, on trail runs, at the beach, to mountain bike, and around town. How can a shirt perform so well on every situation? This shirt is a must have for the active mountain life.
$26.97-$29.97
WAS: $108.00*
perfect for all year layering, our lightweight merino jersey fabric provides uninterupted softness and lines the elastic waistband for maximum
$125.00
relaxed fit made with four way stretch for unlimited movement moisture transfer fibers move moisture away from skin to keep you dry upf 30 protection clima- wool fabrics boast superb breathability and temperature regulation for a comfortable
$100.00
slim fit can be worn as a baselayer or as is crewneck for easy on and off soft and breathable material with cooling feel flatlock seams to help seal in heat single- jersey fabric soft, lightweight material will keep you comfortable all day long longer in back, the curved hem keeps...
5
Nikki12
Very comfortable shirt highly recommended by a size bigger as they run small
5
Dark55
Very light and weight and easy to move around in it
5
Matt09
Great shirt stands out in every way possible very light just had to upsize a size
5
Joey
I ’ m a taller guy and kinda of thinner but this shirt fit me perfect. Also hugged my chest really well and made me feel like a specimen. It ’s a bit expensive for base layer but I will be buying more of these for sure.
5
Wandabelle
He loves the gift and been wearing it in the summer when not too hot. Material is great quality.
$36.00
relaxed fit long sleeve shirt ultra- soft brushed interior offers all- day comfort and warmth true comfort stretch for ease of movement non- deforming design helps hold the shape tag- free design provides a fuss- free wear crew neckline allows for a snug, comfortable
$55.00
Super cool shirt fits good and good for cold weather ... long sleeves crewneck rounded hem gives you extra coverage for your stretching routines and all your multi- direction movements added length helps the top stay tucked in mesh panels on the back and under the arms add ventilation and keep you...
5
Tina1000
My teenage boy wears this top to keep him warm while playing lacrosse and football in cold weather. It is very comfortable and is a great addition to his uniform.
5
Pinky888
Keeps my son warm on chilly days outside. Used primarily under his baseball uniform on cooler days. Comfortable and washes well. True to Nike size, close fitting to the body but not tight.
5
MVB17
My son loves this long sleeve and it ’s been perfect for the gym too
5
LuckyTX247
Recently bought and it was more than what I expected. This does keep me warm especially if you use it under a shirt. I went a size bigger just in case. The fitment was well with a bit extra room.
5
Cbutgo
Great shirt!! Fits great, keeps you warm!! Very happy!!
$115.00
Perfect base for a layering system ... This shirt was so soft and comfortable. ... Just enough to keep me nice and warm without being too overbearing. ... Warm and
5
Patches
[ Needed a thicker base layer for skiing on those colder days. Perfect addition.
5
Captain Jimmy
[ This base layer is really comfortable. It is warm and does not restrict movement. I wish I had found this earlier. Fit is true to size. I 'm not sure why anyone would not be happy with this- buy it!
5
Jbear
[ Merino is THE stuff for active comfort in the cold. The key is staying dry between rain, snow, and sweat... it 's challenging. 100%( 95 and 88 also good) merino helps to achieve this goal. It 's warm when you need it to be and water( all types) evaporates quickly to keep you from getting chilled from damp clothing. It 's got to be part of a system though, and you have to use that system properly or you will get damp and cold. We just came back from five nights in our tent@ an avg. of 26F at night. After hiking all day in these and then, putting on fresh Smartwool tops and bottoms we were warm all night( we could have stayed in the same set if we had to). Medium weight is probably fine for most applications, but do be sure you 've got the right system for the conditions. In summer and spring it 's less critical, but in winter( THE best time IMO)... having the wrong gear can make for a miserable experience... and a dangerous one. Smartwool has the added benefit of being able to go in the dryer at home... not all merino products can. That 's my take.
5
JKNOR
[ When it comes to staying warm during the winter, base layers are KEY! My old Smartwool long- sleeve lasted me years of use. Loved my first one so much that when it came to finally replace it, it was a no brainer. Kept me comfortable and warm during winter months of New Zealand, Japan, all the way to the summit of Mauna Kea. I 've never had a base layer fit so good right off the shelf. Felt like it I was putting on my favorite tshit. Could n't recommend it more
5
Sheri
[ My son loved the wool sweater I bought him for Christmas. It was soft and warm at same time. Mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
$79.99
pont kevlar fibers small: 37 ” – 38 ” chest, 13. 5 ” – 15. 5 ” neck medium: 39 ” – 40 ” chest, 15 ” – 17 ” neck large: 41 ” – 43 ” chest, 15 ” – 17 ” neck xl: 44 ” – 46 ” chest, 18. 5 ” – 19 ” neck xxl: 47 ” – 49 ” chest, 18. 5 ” – 19 ”
$80.00
soft, comfortable and versatile t- shirt for a wide variety of active pursuits features our breathable cool- lite™ breathable and lightweight fabric blend designed to help keep you cool and odor- free offset shoulder seams help prevent friction side splits at hem for added...
5
Sam
[ Is perfect as a travel shirt, very light and soft on the skin. I recommend it completely!
4
Mark G
Main reason for the 4 out of 5 stars is that this model runs small. I ’ m 5 ’ 11 ” and 165lbs and it ’s a little tight for my preference( size medium). Other than that, the shirt is cool, lightweight, and would be great for high output activities or just on hot summer days!
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