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Stay warm and comfortable this winter with our selection of the best winter underwear. Designed for ultimate insulation and moisture-wicking properties, these essentials keep you cozy in cold conditions. Featuring soft, breathable fabrics, our collection ensures a snug fit that moves with you, making them perfect for layering under your winter gear. Whether you're hitting the slopes or enjoying a chilly day outdoors, our winter underwear provides the perfect balance of warmth and comfort. Embrace the season with confidence and style!
$120.00
Longer than anticipated but probably good for tucking in, though not the look I wanted. ... Nice quality, runs
$150.00
Comfort at its best ... Best Ever ... The best I 've ever had. ... Nice and snug Now that I have a pair I won ’ t ever go without. ... These thermals are made really well and the knit is extremely
5
Jeff B.
These thermals are made really well and the knit is extremely comfortable. They keep me warm and in the game. The best I 've ever had.
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!
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
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
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.
See Price in Cart
WAS: $34.99*
Thank you. ... Definitely would recommend this Carhartt base layer pant to my friends. ... Great product and great price. ... Happy with my Carhartt waffle base layer, bought the same thing maybe four years ago and loved them, and I still love
See Price in Cart
WAS: $44.99*
They fit great and keep me nice and warm working outside in the wind all day. ... I bought these so I may continue playing golf in the colder weather. ... Keep
5
Cynthia
[ My husband said he will never wear anything else since buying these he ’s in love with them!
5
JustinK
[ very nice product here. Keeps me warm in 30 degree weather with gusts, and matches the same style top baselayer well. Overall great buy.
5
EricG
Very comfortable and warm without being too bulky underneath a pair of jeans. Highly recommend!
5
LantzW
Easy to put on great fit and feel
5
Rico 51
I bought these a month ago and absolutely pleased with the quality going back to buy two more and they do keep you warm.
$37.99
Girlfriend says that they kept her warm on the colder days ... Helps keep me warm while I ’ m out coaching on the track. ... Very warm ... Good fit ... Good fit, good
5
Mike 8x6
Girlfriend says that they kept her warm on the colder days
5
Arnie
Bought these for an under layer for work and they ’ re great
5
Betty
Bought to replace a base layer of Winter silks. I really like them.
4
Jayb
Good fit, good price! Helps keep me warm while I ’ m out coaching on the track.
$130.00-$150.00
Best material ever! ... It is the perfect weight and is useful all year round! ... They are a more snug fit, but not too tight. ... I did size up and glad that I did- it seems to run quite a bit smaller than the normal baselayer tops and I do n't like the skin tight
5
G Love
[ This top made me ski like an olympiad. Really, it's that good, so I 'm buying it in navy. My favorite underlayer by a long shot, I literally wore it every day of my last ski trip- 5 days in a row. Shhhh.
5
Jess13
[ I bought this about 3 weeks ago… to keep me warm on a climbing trip where we would encounter cooler weather! I have dressed it up, wore around the cabin and out for hikes. I highly recommend!
5
Laurie
[ I bought this several weeks ago and have worn it on several chilly( and hilly) NE dog walks. It provides a warm, yet breathable layer under my light down jacket. It fits very close to my body and adds very little bulk. I appreciate the generous sleeve length. I have yet to launder it as I wear it as a middle layer.
5
Lisa W.
I love this shirt. I had two others that I stained and needed to replace. Thank you.
5
Bouldergirl
[ This is my favorite top for hiking. It is the perfect weight and is useful all year round! I wear it's a base layer in winter and a top layer in summer for cooler days. Best material ever!
$115.00-$125.00
WAS: $125.00*
My legs will not be cold this winter. ... It ’s a great base layer that I can depend on. ... I absolutely love the Smart Wool Thermal merino wool leggings- will be using the set to sleep in for colder hike thrus this fall up
5
Maw maw Z
My legs will not be cold this winter. They are of good quality and very soft and warm.
5
Tara H.
Absolutely love the feel of these thermal pants. I plan to use these on the trail to sleep in on cold nights. It should be comfy and warm. Can ’ t wait.
5
Tara H.
I absolutely love the Smart Wool Thermal merino wool leggings- will be using the set to sleep in for colder hike thrus this fall up north. I can ’ t wait. They are so soft, warm and comfy. The fit was great and I really like the color.
5
Donna
Very soft feel and good fit. I sized up to a 4x, but my usual 3X would have been a good fit. I 've decided I like the roomy fit and will be keeping it.
5
Dawn
Absolutely love these leggings. I know they are meant to be worn as a base layer but they are not see through at all, and butter soft. They fit so much better than the 2 wool& brand I also bought around the same time. I will be buying more!
$125.00
Perfect for the cold winter months! ... I plan on using them for a winter camping trip coming up as well. ... [ Excellent for winter, especially when at camp. ... [ I got these as a gift for someone and was impressed by how soft they
5
Connie
[ My old lady and I have the smart wool top and bottom 250 base layer set. They are exactly what you expect from smart wool. Great quality, the warmth I needed, and pretty useful in most conditions. If you need a base layer or something lightweight to wear on a chilly/cold night- These are useful and for great value.
5
Britt802
[ At first these pants feel sort of itchy but once you 're moving around in them it's very comfortable. I first wore them in 35- 40F under normal hiking pants and was too warm while moving. They do regulate body temp well but I wo n't be wearing these hiking unless it's below 35F. I 'm also not a cold bodied person and I move fast.
5
jjrunning
[ We live in Minnesota, and have pretty cold winters. This baselayer has kept me much warmer than my old baselayers, so far! Great for running, walking or casual use. I plan on using them for a winter camping trip coming up as well.
5
KonaSunsets
[ Bought these as a gift. My daughter said her husband LOVES them. He's had a pair for over 10 years and they are worn out. So a new pair was needed.
5
jackie27
[ I got these as a gift for someone and was impressed by how soft they were. I haven ’ t worn them, but he ’s said they ’ re very warm and not itchy at all. I ’ ll definitely be buying a pair for myself soon!
$110.00
Looks great under skirts for winter. ... The waist is high and seamless and very comfortable. ... [ Good fit, snug but very moveable, slightly more so than Intraknit 200, although both are
5
JLKNH
[ Good fit, snug but very moveable, slightly more so than Intraknit 200, although both are awesome. Pair with waterproof( maybe) lightly lined pant for full winter warmth without the bulk. Love the fun pattern to make life more interesting. Highly recommend!
5
Jacketquestion
[ I was skeptical after reading reviews but I really like these tights. The waist is high and seamless and very comfortable. Also doesn ’ t dig in creating muffin top stretchy and warm. Looks great under skirts for winter. Totally recommend. Feels lighter than the coordinating tops. True to size.
$54.99
This is an awesome base layer pant for cold temps and winter weather very warming but not restrictive ... I would recommend this base layer for anyone who works outdoors in the
5
Robert
Bought these to use as an alternative to fleece lined work pants. Much prefer these as it provides more flexibility, yet keeps you warm. They fit well and pair with my canvas work pants. I particularly like the idea that if the weather warms up enough, I can simply take them off, whereas with lined pants, you 're stuck unless you keep an additional pair of pants with you. These launder well too. The seams in them are placed well so there's no `` tugging '' or tightness. To me, they 're a great cold weather investment.
5
RonaldR
[ Really good and very warm comfortable insulated pants.
5
ToddS
Had the chance to trial these on a field test, very warm and durable. nice snug fit, plenty of room to flex and move. No need for extra layers with these, wore with Carhartt lined bibs and was very comfortable all day
5
DanielF
I received this set of base layer pants for a Carhartt Crew Filed Test to test its warmth, comfort, and durability in real world working conditions. This is by far the warmest and most comfortable set of base layer pants I have ever worn. I wore them over the winter in Colorado and Wyoming in cold weather, heavy snow, and strong winds. I was warm and comfortable no matter what Mother Nature threw at me. They wick away moisture and move with me all day. I would recommend this base layer for anyone who works outdoors in the winter.
5
PatrickK
Received these thermal pants for Carhartt field testing. They strike a nice balance between being very warm, lightweight, and comfortable. Wore under double- front jeans or canvas pants in single- digit temperatures with negative wind chills and my legs stayed warm while moving/working. Their light weight is nice for putting in a pack if it gets too warm while hunting or hiking. They are also comfortable to lounge in in warmer temperatures! Pants are true to size and seem durable, however, I have heard thread stretching when I put them on from time to time( I wear size large and am between a 34- 36 waist).
$55.00
I love that they are high wasted and a large waistband. ... UA leggings are of great quality, fit, and comfortable. ... Wonderfully made and kept me warm. ... Wear them under my work pants and they help me stay
5
Jeff48
Wonderfully made and kept me warm. Well fitting and comfortable.
5
Mars Go
This is so warm! It is surprising
5
Brydollaz
Fits great. Soft fitted material protects from the cold. Wear them under my work pants and they help me stay warm
5
JofD
UA leggings are of great quality, fit, and comfortable.
5
happycusstomer
I had an old pair of cold gear leggings from under armour gifted to me by a friend around 2010. I 've been looking for a new pair to add to my rotation and these did not disappoint. Super comfy. I typically wear a size 4- 6 in pants and went with a medium. Not too compressive but fit great at the waist( 27 '').
$125.00
Very warm and super comfortable for our Michigan winters. ... [ Best cozy layer ever. ... They always keep me warm and hold up wash after wash. ... It works great under clothes- let ’s your skin breathe and doesn ’ t absorb
5
gilllll
[ I bought this for a trip to Yellowstone national park. The color is a bit different from the photo in natural light. Less coral/orangish as I expected. A bit darker and a bit more pinkish. But it's still really pretty and of course warm and cozy as the other Smartwool 250 I owned.
5
Annie
[ I am addicted to smartwool 250 baselayers. They always keep me warm and hold up wash after wash. The material doesn ’ t pill at all. I wear them all fall and winter.
5
Connie
[ I purchased this and the smart wool 250 bottoms for camping/hiking. They are exactly what you think they are and do exactly what you want them to. Warm, lightweight, doesn ’ t stink, comfortable to sleep in and definitely a base layer option for hikes should you want one. I purchased the set on the mystery gift promo- 100% worth it. Value value value.
5
Ellen F
[ Best cozy layer ever. Bought crew and leggings. My walks in the cold weather are so much happier now! Easy to order and fast delivery. Recommend to anyone!!
5
limabean
[ Gave to my daughter for Christmas. She loves it! Large fit perfectly It is great fabric and perfect weight! Would purchase again! Would like it come in Navy.
$125.00
Went skiing at altitude with this as my base layer and it kept me incredibly warm! ... It's a great color and it's comfortable. ... Perfect base layer! ... My husband loves
5
Just another white guy
Went skiing at altitude with this as my base layer and it kept me incredibly warm!
5
Enjoy
My husband loves it. It's a great color and it's comfortable.
$125.00
Perfect weight to stay warm in cold weather. ... I love how they keep me warm but do n't make me hot. ... He said the fit was true to size and they kept him warm while snowmobiling and
5
tjflan2
Fit true and worked outstanding as base layer for football game. Very comfortable and breathable.
5
Mountain time
Fit great especially in length. Perfect weight to stay warm in cold weather.
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
srgmnh
These really are a step above. Great fabric, great warmth, hold their shape well. Worth every penny.
4
Jdub
Smart wool has always made quality products and these are no different. But… awfully pricey for a pair of long Johns!
$130.00
The best base layer ... The contouring is so flattering and it kept me so warm skiing! ... We love a base layer that can be functional and make a little fit! ... I love how comfy and true to size it
5
My favorite base layer! Cute, functional and stays put! I have a hard time with base layers riding up because of my bibs but this doesn ’ t bug me at all. I am usually XS or S, XS fits great but is a little tighter on my arms so if I wanted a more relaxed fit I would go to a S. Also the fabric is soft, warm but not too thick! Also, I wear this out with jeans and it ’s so cute. We love a base layer that can be functional and make a little fit!
5
Bella
I love this top! The contouring is so flattering and it kept me so warm skiing!
5
tarynashh
amazing base layers! super warm, stays put and i love that they are made from natural, sustainable materials. win!!
5
brynnsadventures
[ Absolutely love the mock neck line on this base layer, it really helps keep my neck warm and is n't too snug so it's not irritating on my sensitive skin. I love how comfy and true to size it fits. This base layer keeps me warm in all conditions, absolutely LOVE!
5
JJJCCC
Love, love, love. Sized up for a more comfortable fit and they ’ re perfect. These have become my go- to base layers for cold ski days in the North East.
$39.99-$41.99
These leggings worked great as `` long underwear '' when I need to be out in the cold. ... I bought these to wear under my jeans to an Eagles game and I was soooo
5
Figarohall
I bought these to wear under my jeans to an Eagles game and I was soooo warm.
5
Lynnann816
These leggings worked great as `` long underwear '' when I need to be out in the cold.
$130.00-$150.00
Functional and stylish ... [ This is a quality built base layer and I 've worn it by itself or under a light jacket for plenty of warmth. ... It ’s form fitting and the multi panels really make it articulate with my
5
MoosejawDon
[ Feels light on the skin and is plenty warm. I would like a little more move/breath ability in the pits however I do not feel sweaty. Perfect base or mid layer
5
Timoby2k
[ This has become my new favorite baselayer. It ’s form fitting and the multi panels really make it articulate with my movements. I wear it as my only layer in damp mid thirty degree runs. Also looks good to wear on its own out and about.
4
Rory
[ This is a quality built base layer and I 've worn it by itself or under a light jacket for plenty of warmth. Be advised to go one size up, especially if you have an athletic muscular build. Fits close to skin, athletic cut for sure. Looks awesome.
$39.99
WAS: $44.99*
Have worn it twice- nice fit, very soft, nice base layer that keeps you warm ... Was exactly as advertised and is a very comfortable fit ... On warmer ski days( 20- 30 F) this works perfectly with a layer on top under ski
5
Dad71
Have worn it twice- nice fit, very soft, nice base layer that keeps you warm
5
Jeff
Was exactly as advertised and is a very comfortable fit
5
Jack in Leesburg
Keeps me warm. Does its job. I ’ ll buy another one soon
5
Peter
Very warm and manages moisture transfer as advertised. Great baselayer.
5
BJ Butterball
Perfect fit! Great Value! Quality! Rewards! Location!
$125.00
They also don ’ t look like you ’ re wearing long underwear, so you don ’ t have to wear a layer over them if you don ’ t want to.. aka go to the store for chicken feed and don ’ t want to freeze:) This particular style is more
5
cathy
[ I bought these and the matching top for a hiking trip and LOVE them. They are so soft and comfortable and kept me warm without making me sweat. Perfect!
5
Karen
[ Amazingly soft and NOT itchy at all! High quality and fits very comfortably. Can ’ t wait to try it out soon with cold Michigan winter up north!!
5
Lynn
[ Love the quality and softness of these wool undergarments! I got medium top and bottom and they are true to size. I hike alot in the winter in the Smoky Mountains. These garments kept me cozy and warm! Love the mint green color also!!!
5
inaudwetrusr
[ These are great and probably my favorite pair of base layer bottoms. They are cozy, not too tight and breathe nicely. I ’ d like to buy another pair but my size is out of stock.
5
Ralph
[ I am an avid walker and must have my daily jaunt or I will go bonkers. I have hiked in all weather from the cold sub temps of Minnesota to the rainy and windy winters of Texas. Having warm thermals are essential. Searching online reviews, Smartwool keeps popping up. My wife and I bought two sets each of tops and bottoms and she just simply loved them instantly When ever the temp dips she gleefully pulls on her Smartwool NTS and a shell and she is out the doors. The material is just the right thickness and the seams are well hidden. It instant warms the body and as claimed, do not smell after a few uses As for durability we have to wait and see. We have other woolen garments and we can see these products appear to be durable. No regrets buying them but regrettably the color choices are limited due to stocks available.
$24.99
Keeps you warm ... He wears them every day and they keep him warm. ... 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
5
Tacomama
I bought these for my husband& he is very happy with the purchase
5
DCKP
Great product at a good price. We need to buy the shirt.
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
Johnox
Keeps me warm don ’ t need a lot of clothing on when hunting with its thin material
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.
When searching for the best winter underwear, consider features such as moisture-wicking capabilities, insulation, and breathability. Look for materials that provide warmth without bulk, allowing for comfortable layering. Additionally, a snug fit can help retain heat while preventing chafing during physical activities.
High-quality winter underwear is often made from materials like merino wool, synthetic blends, and thermal fabrics. Merino wool is known for its excellent insulation and moisture-wicking properties, while synthetic materials can offer durability and quick-drying capabilities. Understanding the benefits of each material can help you choose the best option for your needs.
Choosing the right style of winter underwear depends on the activities you plan to engage in. For high-intensity activities like skiing or snowboarding, opt for lightweight, moisture-wicking options. For more sedentary activities, such as lounging or casual outdoor outings, heavier thermal options may provide the extra warmth you need.
Yes, different winter underwear options cater to various body types and preferences. Look for styles that offer a range of sizes and fits, including options designed for a more athletic build or those that provide extra room for comfort. Additionally, consider the rise and length of the underwear to ensure a proper fit for your body shape.
Fit is crucial when selecting winter underwear, as it affects both comfort and performance. A snug fit helps trap warmth and prevents cold air from entering, while also reducing the risk of chafing during movement. However, it's important to avoid overly tight options that may restrict circulation or cause discomfort.
Absolutely, winter underwear is designed to be worn as a base layer for outdoor activities. It provides essential insulation and moisture management, making it ideal for layering under other clothing. Choosing the right base layer can enhance your overall comfort and performance in cold weather conditions.
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