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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.
$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.
$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 merino- covered elastic interior waistband and traditional fly design flatlock seam construction...
5
Kwhendy
Bought these about a week ago and wear them nearly every day. I love how they keep me warm but do n't make me hot.
5
Mountain time
Fit great especially in length. Perfect weight to stay warm in cold weather.
5
tjflan2
Fit true and worked outstanding as base layer for football game. Very comfortable and breathable.
$180.00
smartwool's men's intraknit™ thermal merino base layer hoodie is a lightweight, flexible top with a helmet- compatible hood that ’s made for your most extreme cold- weather
$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.
$140.00
new to our innovative intraknit™ line is the men's intraknit™ thermal merino base layer 1/4 zip. ... insulation, articulation, and ventilation are seamlessly integrated to help with movement and comfort: temp rating of less than 25 degrees seamlessly knit mesh ventilation 3d mapping results in near...
$40.00
designed to be layered or worn alone, this long- sleeve base layer top is made of soft jersey knit fabric that uses our sweat- wicking tech to help you stay dry and
$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,...
$90.00
classic all- season merino: smartwool's most versatile year- round fabric features a nylon core for durability, while keeping soft 100% merino wool next to skin slim fit is intended to follow the contours of the body lightweight merino jersey fabric uses a recycled nylon core while...
$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
$85.00
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
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.
$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
$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
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
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
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
$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
$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
$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.
$65.00
regular fit mock neck lightweight fabric mesh inserts under arms made with recycled materials long sleeve base layer adds warmth and helps regulate your body
$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
$100.00
knit™- engineered body mapped technology? to regulate your body temperature and? let your skin breathe during high- intensity activity cool- lite™- a lightweight and breathable fabric blend raglan sleeve construction for mobility gusseted underarms for mobility and comfort thumb...
5
Mark
[ I am getting synthetic products out of my wardrobe and I have become addicted to Icebreaker long sleeve layering shirts. They are extremely comfortable, come in a variety of nice colors and weights, so are quickly replaced my synthetic top layers.
5
The Greek
[ This is one of two or three of the most amazing clothes I have. Technically it 's a base layer but it 's something I wear almost anywhere with the right pants and shoes. It 's wool, but it 's incredibly soft and comfortable. It works great as a base layer, but it 's versatile.
5
Fredrick
[ This color is perfect, very beautiful and should be used again and again. Ideal light weight garment for fitness. Very breathable.
$90.00
Nice lightweight shirt ... knit™- engineered body mapped technology? to regulate your body temperature and? let your skin breathe during high- intensity activity features cool- lite™, a lightweight and breathable fabric blend raglan sleeve construction for mobility...
5
Chuck
[ Really love the shirt. It looks an feels great. I like everything that I 've bought from Icebreaker.
5
Max
[ No merino wool company compares to that of icebreaker. It feels fantastic while still maintaining all the qualities of merino. I have no complaints about this shirt.
5
BJ
[ Bought this shirt to run in and it 's great. Comfortable fit, true to size and dries quickly when the sweat gets going.
5
JJJL
[ blending with TENCEL making it more comfortable, also no funky smell in the summer.
5
CAL
[ The most comfortable shirt I own and I really enjoy the way the material feels. I also own the `` normal '' ZoneKnit shirts and I had problems with the fabric tearing easily. This has held up better.
$24.99
driven by performance: polyester lightweight interlock fabric manages cool air without creating excess bulk moisture- wicking, antimicrobial fabric minimizes sweat accumulation to keep you dry fit profile: athletic fit crew
5
gkksjdshhdshe
I got it for my grandsons birthday and he loves it
$32.00
I purchased the dri- fit shirt and it works great while running and cycling. ... Fits good and very comfortable. ... Comfortable fit ... regular fit nike dri- fit technology moves sweat away from your skin for quicker evaporation, helping you stay dry and comfortable knit fabric feels soft and...
5
Kellyvt
Quality shirt, holds up over time. Solid compression. My son loves these shirts
5
Sport enthusiast
I bought these for my husband. He felt he needed to size up. He usually wears an XL, but not this time. Slimmer fit than what he is used to. He ’s 6 ’ 4 ”, over 200 pounds.
5
cerdanoel
This shirt is great for working out or just in general, especially if you are looking for a light shirt
5
Dicksupport22
Perfect fit and function. Great quality. Son loves it.
5
jwils004
Great fit, great feel. Perfect for lifting or sports.
$37.00
I got the large size/ slim fit and this is perfect for my body frame with just less than an inch of room around my trunk. ... Bought a month ago for my gson to wear while playing football, it ’s a great comfortable fit, he wears it every game
5
ned113
I bought this nearly a month ago and happy that I did! Great fit, and allows me to move freely. I wear it while working out at the gym.
5
4dew4
I was in need of a white base layer that night for my son. This was the smallest option in any brand available for immediate pickup in store. It ’s too big, but was adequate and didn ’ t complain.
5
Sportsgma
Grandson loves this shirt, it 's the second one I bought for him. He likes the fit best compared to other compression shirts.
5
dwmay17
this is great for base layers. use while I am skiing.
5
Bballmom08
Bought for my Senior kid, and he loves it for baseball evenings
$30.00
Great layer under sports jerseys. ... Love this as my under sports layer! ... Fits perfect, super comfortable, looks great. ... Both my sons always wear their men ’s under armour heat gear under their pads for every football
5
Merle Henry
Son absolutely loves his UA and these compression fits! This is one of a few and had many overs years, but out grows them! I think he ’s finally stabilized at 6 ’ 6 ”, so we ’ ll see how long one lasts…😂🤣 Thanks UA for a great product!
5
JonRule336
I bought this for my 11 year olds to keep their shoulders in check during games and practices. These fit like a glove and have a really tough look to them!
5
Amp1190977
Fits true to size and it feels great on and keeps the
5
Bpm2211
One of the best compression shirts my child has. Very well made.
5
Mario529
This compression is perfect for my football trainings and gym workouts. I highly recommend
$48.99
WAS: $50.00*
Been looking for that well fitting and comfortable layer that will keep my kid warm during winter workouts and in early spring on the baseball field. ... Sometimes I have baseball games in the morning and this cold gear long sleeve shirt works wonders for those cold
5
IUBob
Under Armour has no rival in the category of cold weather gear. Their ColdGear is simply the best.
5
Langus
Love the style and as a big guy the fit was what I expected
5
Mymy00
Grandson is very pleased with this shirt plan on buying another
5
Baseballparent1
[ Been looking for that well fitting and comfortable layer that will keep my kid warm during winter workouts and in early spring on the baseball field. Just ordered several more.
5
Ray88
[ Sometimes I have baseball games in the morning and this cold gear long sleeve shirt works wonders for those cold mornings
$30.00
Cool compression without construction ... This is a good balance between UA quick- drying tech fabric and light compression to keep things stable while in
5
Juanito125krew
Great fit, lost some weight and feel great. Wish they were cheaper but I ’ m already looking at different colors!
5
Samuel T
I am 50 years old and I 've used under shirts off and on throughout my life. A few years ago I discovered the UA HeatGear and now I have wear them all the time- I can not go out if I do n't. I do n't feel comfortable if I 'm dot have my HeatGeaar on. I have them in many different colors and have lots of them so that I always have one to wear.
5
Ordered the medium per the size chart and it fit perfect. Just the right amount of compression. Worked out and the wicking effect was good.
5
Lioness75
Bought this for my son who plays basketball. He wears it under his uniform and reports it is comfortable for practice and games.
5
WLG pa
Love to wear shirts when working. Fit is good and they have many colors and sizes. Ordering on line is easy and they have more colors.
$55.00
My son used this shirt for soccer and it was perfect for those colder nights! ... nike® dri- fit technology moves sweat away from your skin to help you stay dry and
5
Fin10win
This has replaced all other gear as my favorite workout shirt for anytime except summertime...
5
mcsarah2019
Length and fit were great. Was true to size and did not shrink
5
Scott 905
I use this shirt underneath my hoodie during winter snow removal. I like how warm and dry I feel after any cold weather activity.
5
Travels
Great base layer for cold days on the track. Fits great!
5
Joe gifts
Love the material. It definitely keeps you warm. I ’ ll be ordering more
$35.00
great comfy shirt ... My son bought this long sleeve he states it ’s very comfortable great quality and is true to size. ... Great for cool fall nights ... It kept him warm and didn ’ t get in the way playing
5
ElectroswingFan76
There 's no surprises with this heat gear... form- fitting, moisture wicking, and washes easily with no fuss. Could n't be happier!
5
Nickczi
Great but fits very tight needed to return
5
Len Len
I have several colors and would love for UA to make orange and sky blue with the matching leggings. A very comfortable piece of clothing. Whether you are walking, running or bike riding this UA product works. It washes well and does not lise shape like other brands.
5
CAC2025
Very snug, but comfortable fit. Stitching seems to be holding up very well.
5
FrancisSD
From my experience, Under Armour has the best compression shirt. Other brands have compression shirts, but UA ones last longer and stay in the compression form much longer. I continuously buy different colors and lengths since I wear UA compression shirts to the gym most days.
$30.00
WAS: $35.00*
designed to be layered or worn alone, this base layer tank is made of soft jersey knit fabric that uses our sweat- wicking tech to help you stay dry and
$75.00
Lightweight but still warm enough for fall days. ... fit and design light, comfortable long- sleeved top in a soft merino wool, recycled polyester blend combines the thermo- regulating nature of wool with the durability and quick- drying properties of polyester great first-...
$55.00
machine washable ... relaxed fit seams set away from shoulder for added comfort moisture transfer fibers move moisture away from skin to keep you dry upf 30 protection classic crewneck long
$109.00
It's a perfect base layer for resort and backcountry skiing. ... A great base layer ... Great base layer ... Super comfortable and lightweight, seams do n't restrict
5
These are really good. Very comfortable to the skin across wide temperature range
5
Kenneth D
All the benefits of Merino wool with the strength of nylon. I definitely recommend this if you are a one bag traveler.
5
Hans
Super comfortable and lightweight, seams do n't restrict movement
5
LC
I wore this the day after I bought it and it was great. Temp was around- 5 Celsius and I used it as a base layer. Kept me warm and comfortable.
5
B
So far I have used it for resort and backcountry skiing and it has worked perfectly for me. I am 6' 1 '', 170lbs and the L fits well.
$65.00
slim fit short sleeve round neckline soft jersey clothing layer: first layer, insulating layer ... lightweight short- sleeved t- shirt in a soft jersey knit made from merino wool and recycled
5
lukasz1979
Nice material, better than other merino T- shirst I got in the past, including Icebreaker. I bought one more Abisko Wool T- shirt right away.
5
Axel
Best t- shirt around. Got in 3 colors and will buy more in a heartbeat should more colors come that suit me. Excellent flattering fit, really like the slightly longer arm that does n't ride up. Please add even more staple colors and v- neck options would
5
Lucas T.
This is the PERFECT shirt for warm weather trekking. The super soft merino wool fabric helps wick moisture and keeps me smelling fresh while I 'm out on the trail and wo n't stink after a long day, it also helps keep me cool. I wish more brands would recognize the amazing properties of wool, it 's not just for winter!
$32.97
WAS: $70.00*
Excellent base layer for any outdoor sport!! ... A lot of products are heavy and bulky, but this Under Armour Crewneck Baselayer is incredibly warm but
5
JTBo
Excellent product…very warm
5
Base 3
Great feel true to size while being slightly snug which I prefer!
5
Kar1388
Super comfortable and snug fit. Perfect for cold weather
5
HB1153
I was pleasantly surprised by how warm this base layer really is. It made all the difference during outside chores this winter.
5
Proline1988
I work outside all year round minimum 8 hrs a day. I 've tried many different brands of long John 's but nothing beats Under Armour Cold gear 3. 0. Keeps me warm and dry. Very comfortable to wear. Cost more than the traditional long johns but well worth it. I definitely recommend this product.
$75.00
Incredibly warm and comfortable. ... I like to wear these in spring& autumn when it's a little cooler. ... Thin, breathable and Light. ... Keeps you cool and stops outer layers from getting
5
Ck
Fantastic item. Great compression and wicks away sweat perfectly. Like it so much I bought another one.
5
No bad news, perfect like always 😉, highly recommend to everyone!!
5
Dridgey
Incredibly warm and comfortable. When arrived I was worried they looked very small, but stretched and feel like a second skin
5
Only me!
Never got the point of these tops until I tried one. Excellent outdoors no matter the weather. Does two jobs, wicking sweat to keep you more comfortable and on cooler days also acts as a second layer. Must be the way the air is `` trapped '' within the holes in the mesh. But they are great on the turbo too, if like me, yours is in the unheated garage. Put a loose top on until you get warmed up. Once that 's off, this mesh top is brilliant. Really recommend them.
5
Stephen_Phillips
This short sleeved base layer is the best one I have ever owned. It is very stretchy and close fitting- almost like a compression vest, which takes a bit of getting used to but once out on the road it is extremely comfortable and very warm. The fishnet structure really works to keep you warm- providing you trap your body heat in the holes by keeping the wind out, so I found it works great even in winter if you wear a windproof or waterproof top. I double up by wearing a gilet under my waterproof top. The sizing is difficult to recommend because on a coat hanger it looks like your little sister ’s vest but is stretches almost double in size. Luckily it does this because with a S/M size I must be at the maximum limit! The other good thing is that the sleeves are long and clinging so arm warmers grip to it really well and don ’ t creep down, as happens with all my other under vests. If you have a bit of a belly I recommend using the L/XL. The model is wearing S/M- well I am 5 ’ 10 ” and 77kg and S/M has me trussed up like the guy from Erasure- ha, at least my wife thinks I look good in it so a win;-)
$50.00
breathable and stretchy slim fit cool- lite™- a lightweight and breathable fabric blend that is designed to wick moisture away from the body gusseted for mobility and comfort contoured pouch for comfort flatlock seams to prevent friction support and comfort for daily
5
Al
[ I bought 3 during their sale and that was 3 years ago and it still feels great. This is my 2nd set and will get a few more soon.* I need to buy more and plan to use these on my TMB( Chamonix) 10 day hike in Aug /2025
5
James Z
[ As always these boxers are excellent. Great fit and feel. Honestly, you can wear them Multiple days.:)
5
MrHarryBay
[ Had some merino blend boxers of unknown countenance that were my go- to workout undies in cold weather. They finally wore out and I checked the label to see if I could get a next- gen replacement. Happy to see that Icebreakers was still there. So I bought three. And they rule.
5
Freeheelpete
These are in my daily driver rotation. No complaints, especially at the sale price I picked them up for. Tencel blend durability seems fine for merino, so they 're reasonable value.
5
GDSESQ
[ I have numerous pairs of backpacking underwear. These are the most comfortable I have purchased. The last thing you want is for your underwear to ride up on you.
$110.00
light and comfortable fleece sweater with half- length zipper discreet thumbholes integrated into cuffs great as mid layer, or a first layer in warmer
5
Rob
Well made, great fit, would definitely buy another
5
Ryan
High quality material that hasn ’ t pilled after a year of use and washing. It ’s long enough for my 6 ’ 5 ” frame. I have the half zip and full zip, and they are worn regularly. I wear them to work and in the outdoors. Great for hiking. They ’ re lightweight enough to wear when you ’ re sweating, but warm enough for when it cools down.
$34.99
eco- conscious mesh fabric for lightweight breathability integrated gel chamois provides maximum cushioning and comfort designed to layer seamlessly with any outer short excellent moisture management keeps you dry and
$40.00
a perfect first layer in both warm and cold climates, and extra useful on multiday trips as wool naturally resists bad odours. ... washing: 30°c mild process dry cleaning: do not dry clean bleaching: do not bleach drying: do not tumble dry ironing: iron 1 dot- max 110°c do not use...
$55.00
nb dry fast- drying technology wicks moisture away from your body to help you work out with ease non- compressive base layer design classic fit — perfect for active movement with a fit that ’s not too
$128.00
this sweater features a lightweight, breathable knit and a new novelty stitch that steps up any summer outfit. ... standard fit shirt button closure resort collar short sleeves soft cotton, this sweater is breathable, perfectly warm, and incredibly easy to wear stitch flower...
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