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Enhance your athletic performance with our premium performance base layer collection. Designed to provide optimal warmth and moisture-wicking capabilities, these layers keep you comfortable during any activity. Featuring lightweight, breathable fabrics, our base layers offer a snug fit that moves with you, ensuring maximum flexibility and support. Ideal for layering under your favorite gear, they help regulate body temperature while keeping you dry. Elevate your workout experience and stay focused on your goals with our high-quality performance base layers.
$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.
$39.99-$41.99
silvadur™ intelligent freshness controls odors and bacteria growth, and the top wicks away moisture to keep you dry and focused. ... the raglan sleeves offer full mobility and the drop tail hem adds coverage at the back so you can move with
5
Figarohall
I wore this to the Eagles playoff game and I was very warm and comfortable
5
Bthehostess
My daughter is really picky with fabrics that touch her skin. We needed compression shirts to wear under her soccer jersey this winter. She absolutely loves these compression shirts. A little pricey but def worth it. We will be purchasing a few more for her.
$75.00
For me personally, this is the best base layer for nippy days because it so breathable that you wo n't overheat or sit in your own sweat. ... I bought this a while ago, use it for nearly every ride, super breathable and
5
Schudos
I was in doy todo about the base sleeve becarse of the mesa. However, it keeps you warm as needed in Winter and early Spring time
5
Atreides
Very good and efficient base layer. Warm& snug in mid winter
5
Ryan
Perfect base layer for the deep winter conditions, fits well, locks the heat in and wicks sweat out.
5
J Ryan
Fantastic base layer quality item and comfortable to wear.
5
Irene c
Amazingly warm and love the sleeves which are long and keep me super warm
$70.00
Well made, comfortable and supportive, wicks sweat away very well ... My boyfriend loves the comfort and durability of the base layer. ... Fits great, comfy works
5
Stuart
Comfortable and great feel under cycling top. Happy with the meshing
5
Samuel
This Base Layer feels very luxurious. It's very breathable, but a little thicker and therefore ideal for spring and fall( and also winter) rides.
5
Dridgey
Incredibly warm and comfortable. When arrived I was worried they looked very small, but stretched and feel like a second skin
5
Randy P.
Felt great on my first ride. Good fit, comfy and warm. Temps were high 30 to 40s Fahrenheit.
5
R.Blockley
Fantastic product. Super comfy and great fitting. Very happy with my purchase
$39.99-$41.99
silvadur™ intelligent freshness controls odors and bacteria growth, and the flat seams ensure irritation- free wear. ... the brushed interior offers next- to- skin warmth and the single layer engineering ensures quick- drying
5
Figarohall
I bought these to wear under my jeans to an Eagles game and I was soooo warm.
$69.99
WAS: $70.99*
pont kevlar fibers x- small: 24 ” – 26 ” chest, 10 ” – 12. 5 ” neck small: 26 ” – 29 ” chest, 12 ” – 14 ” neck medium: 29 ” – 32 ” chest, 12 ” – 14 ” neck large: 32 ” – 34. 5 ” chest, 13. 5 ” – 15. 5 ” neck xl: 34. 5 ” – 35. 5 ”
$85.95
As it has cooled, it is serving quite nicely ... neosport® ’s polyolefin construction delivers a warm, thermal fabric with moisture- wicking components so you stay dry and comfortable while your kayaking, surfing or
5
Shekky
Wanted something to help extend my pool time later in the fall and start earlier in the spring. As it has cooled, it is serving quite nicely
$57.99
Makes an excellent base layer for outdoor sports activity. ... He is very satisfied, says this helps keep him warm better than other brands he has tried. ... Must have for cold
5
Kellieruth
I bought this for a trip to Colorado. Worked great in cold temperatures and washes up to look brand new.
5
Jay64inTexas
I bought two of these in preparation of a freezing winter weather storm. I could not be happier with the quality. Theese are great as shirts as well. Seemed a little costly, but well worth it.
5
SOCORROV
They are a Christmas gift but the material is awesome.
5
JohnW
I purchased the thermal pant at a local Carhartt store, and the thermal shirt online. Both fit perfectly and provide good warmth under the Carhartt twill pants.
5
MicheleL
My husband now has one of these for everyday, they are comfortable and do a great job of keeping him warm as a base layer.
$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
$44.99
5. 4- ounce, 100% polyester low mini- grid midweight, carhartt force® base layer built with force fast ... these tights give you the range of motion and warmth you need when battling the cold
$99.99
pont™ kevlar® fibers in the neck collar area and comfortable, moisture wicking fabrics through the arms and torso to keep you feeling fresh all game
5
LDonley
I got these for my kids to replace their traditional hockey neck guards and love that it's all one piece. It eliminates the gap left by detached style guards and gives me more peace of mind when they 're out on the ice. They fit great, do n't get rank smelling like most hockey gear, and provide great protection.
$115.00
Solid base layer ... awesome base layer ... I love the base layer line of Smartwool. ... love the thin layer and wool is not itchy ... My son loves wearing thermal bottoms for
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.
$44.99
My fiancé loves to layer it to give an extra layer of warmth without the bulk. ... You feel instantly warm and cozy when you put this on. ... They 're warm, comfortable, and definitely work for my vet
5
AnthonyV
Very comfortable and warm, while also lightweight, perfect for a few days on the slopes!
5
Denise
[ Keeps my husband warm when he works outside! Will purchase more
5
SOCORROV
They are a Christmas gift but the material is awesome.
5
ArturoR
It is amazing, kept me warm when the tempt dropped to 17°F
5
Slim67
Lightweight, soft and warm, just what is need from a base layer
$54.99
Perfect for layering under pants when working all day outside. ... Great fitting, warm layer option ... My husband said he liked them, they are quite heavy, heavier than we thought, but are very happy with the
5
MDV43
Comfortable. They fit full length. I am 6' 3. They did n't shrink when washed and they are just overall pretty awesome for thermals.
5
NancyG
These thermals fit well and keep me nice and toasty when I 'm outside.
5
Ppinner
I bought this product as Christmas present for my husband
5
MarcosD
These are baggier than most thermals but work great.
5
Jack sprat
Recent purchase, worn a few times. So much better than my old pair of thermals.
$90.00
It did a great job keeping me warm in those temps even with wind. ... The sleeves are long which I love. ... This sweater is comfortable, soft and a great layering piece for the
5
T Oot
Just came back from Banff Canada and wore this base layer everyday. I was warm and dry in sero degree weather!
5
Terri350
They fit great, feel great, and are really warm. I will buy them again!! Not sure what else to say but they require a longer review. I really, really, really, really like these base layer tops!!
5
Mkt5308
[ I 'm tall with long arms and sometimes merino is too short in the sleeves, not this time, fit is great medium is medium. Pistachio color is bright and fun
5
Dsrote
[ I purchased a smart wool base and fell in love. it ’s easy to clean and amazingly warm for its light weight! i would buy other colors if available.
5
Silvercurls
[ Bought my Smartwool Women's Classic All- Season Merino LS Base Layer Tops just in time for the cold weather in the “ D ”. Best referral from a friend ever! Not only do I look good because they fit beautifully but are lightweight; so I ’ m not bulky 😊 whether worn alone( burnt orange is hot 🔥) or layered under my sweater I ’ m warm and toasty…looking good! Not sweaty in this wool top; comfort is sexy, ok! Grabbing more for stocking stuffers 😊
$120.00-$145.00
we 've updated the fit of our men's classic thermal merino base layer 1/4 zip to improve functionality while also enhancing aesthetics. ... as one of our heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced merino wool, shoulder panels, and a...
$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.
$49.99
crewneck fits closest to your body for a comfortable fit fits next- to- skin but never restrictive smooth flatlock seams enhance comfort concealed thumb
5
KellyOP
I bought two of these to wear under my scrubs for work. I was a lot warmer then without. I also wear these walking the dog. They are worth the price.
5
nan2
[ I bought this as a gift for my daughter who loves to snow ski. She was skiing in 6° weather and it helped keep her warm. She said she loves it.
$90.00
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 without washing- does n't get stretched out and dries
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.
$49.99
My long time struggle in looking for base layers is the length and fit around the curvy areas of my legs( calves, thighs and hips) and these have been the first pair I genuinely enjoy wearing and also keep me very
$89.99
performance technologies: flatlock seams reduce chafing du ... q smart temp technology helps regulate body temperature and reduces odor- causing bacteria easy- close adjustable collar for customized fit and
5
ALM15
My daughter prefers the Bauer to CCM in these neck guard shirts, I like the higher neck coverage as well.
5
Hockeytimemom
This is the 2nd shirt we are buying to keep as a backup. By far my son's favorite for comfort.
5
Nanakin7
We purchased this for our granddaughter who plays ice hockey. She finds it to be more comfortable than a standard neck guard.
5
BAP55
Bought this for hockey loving son. Definitely nice having the built in neck guard.
5
Kc55321
Great for kids who are picky and don ’ t want to wear just the collar
$65.00
regular fit baselayer crew constructed with 4- way stretch material that moves better in every direction ua ’s warmest baselayer yet, delivering extreme warmth in the extreme cold soft, brushed grid interior traps air, managing your body's microclimate to keep you warm and comfortable dropped,...
5
SkiBear33
4. 0 is the best base layer for the price. My kids are competitive skiers in the Northeast. Our winters are harsh and with windchill the temperatures can drop below zero. Using these 4. 0 as base layers helps to keep their heat from escaping. They hold up well through washing and the boys playing/lounging in them after skiing too. They both have two sets, and I only replace once they are outgrown. I just wish they came in more colors.
5
John Meincke
Spend money and buy the best performing stuff you can. And this is it. product was true to size. Kids were the other day and were plenty warm.
5
James CG
This shirt was absolutely perfect for our son ’s outdoor soccer. He was warm and comfortable for the outdoor session. We have already ordered more!
5
New Soccer mom
() Excellent base layer for outdoor sports. Light and Not heavy but warm enough for those chilly days and nights to keep your little player nice and warm, even when out in the field. Perfect for winter sports like hockey or soccer. I ’ m going to be purchasing more of these base layers!
4
Jessica1000
Purchased for winter soccer practices for a small 12 year old. Material feels to be good quality. It is really thick. The armpit area felt tight so we will be returning and purchasing the next size up.
See Price in Cart
WAS: $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 for a range of body shapes back body seam wraps to front for body- enhancing fit crew neck with...
5
BGRD
[ This shirt is incredible. I wear them daily during the winter time so I wanted multiple. Smart wool shirts are warm and not itchy at all! I wear them hiking as well as under dressy tops to stay warm in the office.
5
reddread
[ I waited forever to get this on sale and now I wished I 'd bought several in different colors! Warm but breathable, and stylish enough to layer with a jacket for a business casual look. I ca n't wait to take this baby out to the slopes!
5
Beez
[ SmartWool is our go- to for liners. It's well fit, cozy, soft and super warm. It does n't itch and make you warm yet is great to wear inside and on mild days out. Got this one for my wife.
5
klili
[ I got this a couple weeks ago and it's been perfect, it's of course a great base layer, but for days when too many layers are n't needed it is perfect as a long sleeve T- shirt. Hoping to get a couple more to round out the winter layers
5
Springtime44
[ I love smartwool products! This is my second of this specific shirt! My first one was a medium, which is perfect for layering, very form fitting. So I purchased a second in a different color in a large to wear everyday!
$85.00
no matter the season or the activity, this base layer is made for it. ... Great quality, ordered for my husband for Christmas. ... He loved it.. would order
5
MAJB
Great quality, ordered for my husband for Christmas. He loved it... would order again.
$44.99
I bought these so I may continue playing golf in the colder weather. ... Keep Warm ... Wore these under snow pants in- 10 weather for ice fishing and they worked
5
ThomasL
This base layer has been great in cold weather. They perform well enough that I do n't notice I am wearing them while working.
5
JamesY
They fit great and keep me nice and warm working outside in the wind all day.
5
Lando523
Wore these under snow pants in- 10 weather for ice fishing and they worked awesome. Definitely buying them again in the future!
5
Tanner2
These base layer bottoms are great for cold weather. Carhartt products never disappoint.
5
GolfmanNJK
I bought these so I may continue playing golf in the colder weather. I ’ m pleased with the results.
$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.
$49.99
I work in a freezer and these are very good at keeping my legs warm. ... He definitely feels warm in them! ... These fit great and feel soft. ... Very comfortable but a little tight around the
5
Michael prez
Great product. just as described. fast shipping and fairly priced
5
JeannineR
These are great, its the second pair I have bought for my husband. He works in a freezer all night long and these are great and really help to keep him warm.
5
Madison L Green
Bought right before it started getting super cold and so glad I did!
5
Mscole12
Bought for husband…Good fit, comfortable fabric, decent price.
5
DennisR
These fit great and feel soft. Keep me warm all winter long
$130.00
slim fit is intended to follow the contours of the body crewneck long sleeves engineered construction uses knit structures to enhance performance with lighter weights and cleaner finish 3d mapping results in near custom fit and freedom of movement while ribbed elbows provide added...
$130.00
merino sport yarn combines the power of merino with the durability and fast dry times of polyester mesh ventilation seamlessly knit in gender- specific zones designed to keep the body dry and
$65.00
regular fit baselayer leggings constructed with 4- way stretch material that moves better in every direction ua ’s warmest baselayer yet, delivering extreme warmth in the extreme cold soft, brushed grid interior traps air, managing your body's microclimate to keep you warm and comfortable material...
5
Britt829
These are amazing! We love them. ❤️ My dad got my husband and I both a set for Christmas like 10 years ago or more. They are still in perfect condition. We use them for hunting, playing in the snow or anytime we have to be outside for long periods of time in the cold. When I go hunting and it's super cold or wind chill of- 15. I wear mine, my husband's and my under armour sweat pants under my hunting bibs. No need for a heater at all. My son told me he needed some bigger under layers so I automatically ordered him this set. He is going to be so excited when he gets the Christmas morning. If you have multiple children you definitely need to get these. They are such a good quality and will last for years if they are taken care of. The adults sizes are pretty unisex in the bottoms. The woman's top seems to be a little more fitted for the breast.
5
John Meincke
By far the best and warmest product you can buy. The sizing accurate. Spend the money and buy this instead of the cheaper, knock offs that do not perform as well.
5
Zay63
These are great! They keep me warm in the coldest weather. I ’ m always cold so these are a blessing for me because they keep me warm and they are not bulky. They wash up great.
$90.00
slim fit base layer bottom constructed with lightweight merino jersey fabric with a recycled nylon core for increased durability features merrow stretch stitching designed to elevate comfort, range of motion, and fit merino- lined elastic waistband for maximum comfort 31 ”
5
ErinH
[ These worked great for skiing in single digit to mid- 20 ’s temps. They ’ re comfortable, not scratchy, warm but breathable. Will definitely buy more.
5
Wasloki
[ Bought for my wife for an upcoming trip to the Arctic. She loves them. She says they are soft and not itchy. Like they don ’ t require to much special treatment in the wash and don ’ t shrink
$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
$99.00
the g- base short is the perfect baselayer to increase the results from your workouts. ... designed for comfort and breathability, the g- base distributes 2 pounds of
$95.00
This is a very compressive base layer top so be ready to feel snug and compressed in. ... 10/10 recommend for anyone needing a well- fitting, functional base
5
Emily H
[ This is a great base layer for a cool day, super warm and fits perfectly under a ski jacket. This top even works as a super warm base layer where you can easily layer on top for those chilly days. the colors are amazing, I hope they keep launching new bright colors!
5
iama_dela
I bought this top a few weeks ago and so far I have worn it only once to ski in the East coast. I can not emphasize how warm and cosy these Halfdays inner layers! I never feel cold on the slopes even when I am not actively skiing. The color is also perfect and goes well with almost anything! I can ’ t wait for more colors to come out! FYI I am usually an XS but I bought the top in S because they ran out of XS for this specific color. I initially thought S would be too small for me( it looked small) but it turned out to be just a little bit bigger than the usual fitted look an XS would have. I think the top is definitely true to size so I would recommend getting your regular size.
5
Karley
I bought this set in pink for a ski trip to Aspen and it was amazing! The set kept me so warm on the mountain and the grip feature on the top prevented it from not rolling up. I found this outfit to be so flattering I even styled it with a fur coat to wear to apres and to walk around in aspen.
5
Julie
Great material. Is thinner and more comfortable than most thermals.
5
Mads
Super warm, kept me the warmest out of all the base layers I brought. I even wore it twice because it was so reliable.
$110.00
slim fit long sleeve base layer fabric combines moisture management, temperature regulation, and odor resistance of merino with the softness and cooling properties of tencel™ lyocell performance fabric mesh ventilation seamlessly knit in gender- specific zones designed to keep the...
$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
$51.99
dry technology wicks sweat and dries fast rugged flex stretch technology is built to move odor- fighting technology ... force fast ... brushed elastic waistband with concealed stitching contoured front fly closure smooth flatlock seams reduce chafing tagless
5
Outdoor T
Best value for quality base layer pants, would highly recommend.
4
GodisGoodandKindForever
My teenage son wears these as Baselayers skiing and they are perfect for 20 degrees and up!
$19.99
boasting a versatile athletic fit profile, the evo ... crafted from polyester interlock fabric, this shirt provides a lightweight feel that ’s supportive of key movements they make on the field, and also utilizes moisture- wicking properties to keep them comfortable and
$130.00
slim fit baselayer top classic, comfortable crewneck design engineered construction uses knit structures to enhance performance with lighter weights and cleaner finish mesh ventilation seamlessly knit in gender- specific zones designed to keep the body dry and comfortable 3d...
$120.00
slim fit top contour the body heavy base layer top and best base layers for cold weather made with interlock knit for enhanced comfort offset shoulder and side seams to increase comfort and minimize chafing side seams wrap to front for body- enhancing fit temperature regulated: helps keep you...
$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
$12.97
WAS: $19.99*
This was a very modestly priced thermal top which looks and feels great. ... The fit is great and the material is very soft ... It is nice enough to wear as a regular shirt, and the lilac color is
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