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Stay warm and comfortable on the slopes with our collection of ski base layer bottoms. Designed for optimal insulation and moisture-wicking, these bottoms provide the perfect foundation for your winter gear. Featuring stretchy, breathable fabrics, they ensure freedom of movement while keeping you dry and cozy. Whether you're carving down the mountain or enjoying après-ski activities, our ski base layer bottoms offer the ideal blend of performance and comfort. Gear up for your next adventure with essentials that keep you warm without sacrificing style.
$63.97-$85.00
WAS: $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
$9.97
WAS: $24.99*
My son uses them as a base layer for skiing. ... Best base layer ... Awesome base layer ... varitherm base layer lightweight, second skin feel champion vapor technology with x- temp™ moisture wicking quick drying...
5
soKate120mm
I already own many Duofold items and getting the leggings was a no brainer. I like the excellent quality and the warmth it provides. The fabric is very stretchy without being too constricting. It has a fly for those who use it. The fit is perfect.
5
DeniseLG307
Bought this for my husband who works outside, he said they are comfortable and keep him warm
5
Nita22
Bought them for grandson, perfect fit& durable.. he loves them!!!!
5
YA7E
honestly very skeptical at first, especially considering the price but these are one of the most comfortable pair of pants i own, they definitely regulate temperature
5
rubdog5
A must when going snowboarding. My legs were very warm and comfortable to wear
$14.97
WAS: $44.99*
I love the thickness, double layered. ... two- layer thermal for warmth in extremely cold weather flatlock seams to avoid irritation drawcord for custom
5
Jordan2121
Fits comfortably and can move well in them. Perfect for any activity.
5
ToastyWarm
The Champion Duofold Men's Varitherm Expedition long johns are the best! A little pricey compared to some others, but you get what you pay for. I love the thickness, double layered. They keep my family warm during Winter sports. These `` Expedition '' pants are enough to wear under your snow pants... no need for another layer of sweatpants, etc. This brand, style is the ONLY one I have purchased since I became aware of them... I believe that's been over two decades! Now, I 'm buying them for my grandchildren!
5
Bengi
Really comfortable and warm better than any others that I ’ ve worn
5
powerstroker57
Bought this for a Spartan race out in the cold rain and kept me warm! Highly recommend! Super comfortable too!
5
Mr B
Great product**
$74.97
WAS: $100.00*
This base layer is amazing. ... Love them, extreme warmth, so much warmer than base 3, I like the looser fit in the legging ... These are amazing to keep me
5
Mand4
Comfortable and warm, like that they are black and can be worn as a base layer or outer layer
5
Mom2025
Got this for my daughter, she is a teacher. Keeps her warm through her sedentary day. We 've tried other products with little success. The 4. 0 is perfect.
5
GT1976
The Under Armour base layer are the best thermals on the market!
5
mob1032
These leggings are very warm and great for watching football games in the winter.
5
Kristy w
The best cold weather gear I have gotten yet!
$72.97-$115.00
WAS: $115.00*
These leggings are my go- to ski base layer and have been for some years. ... Great Base Layer ... slim fit baselayer bottom fit updated to improve functionality while enhancing aesthetics mid- rise sits at just below the belly button for superior...
5
posie
[ Very impressed by Smartwool after hearing from a friend. this baselayer is super lightweight and warm. good for running as it is or layering under a waterproof pair of pants for frigid weather to hike
5
Sdwvt
[ I now own two pairs of these bottoms. I sized up to a medium. I wear them under my snowboard shell pants. I stay warm and they do not bunch. They are versatile. I can wear them around the house and out for walks. I love them.
5
Toasty
[ Driving around all day when it ’s cold out delivering mail and packages to the door, they help keep me warm and moving along. Oh come on, thanks for everything.
5
Lydn
[ The perfect merino base layer and lounging bottoms. Not itchy at all but soft, comfortable and stretchy. I 'm 5' 1, 108 lbs and the S fits well, not skin tight.
5
Prp74
[ I bought this wear at night during a backpacking trip. Worked perfectly when the temperature dipped to 30. More comfortable than the smart wool 150 baselayer.
$36.00
quad- blend fabric technology allows heat retention to keep you warm ... relaxed fit pants ultra- soft brushed interior offers all- day comfort and warmth true comfort stretch for ease of movement non- deforming design helps hold the shape tag- free design provides a fuss- free
$29.99
this base layer was designed with cold ... Thermal bottoms keeping me warm ... Wonderful fitting thermal bottoms arrived just in time for the snow. ... This is the first time I 've purchased or worn these pants and I like how they
5
aggielre2000
Love these, kept me appropriately warm on the slopes
5
Seabass76
This is the first time I 've purchased or worn these pants and I like how they feel.
5
SteveJ19
Wonderful fitting thermal bottoms arrived just in time for the snow. Free shipping and three- day turnaround were pluses.
$159.99
Bought the base layer bottoms for my granddaughter to stay warm and comfortable on cold, breezy days out on the golf course when the season begins in
5
Nmwalz
Perfect fit according to sizing guide! They warm up like the snap of your fingers! Definitely a great purchase!
5
Native Mainah
Great quality, quick shipping! My wife has had her knees replaced and these are working great to keep her warm.
5
Pam
Bought the base layer bottoms for my granddaughter to stay warm and comfortable on cold, breezy days out on the golf course when the season begins in February.
5
Sharon
So comfy and warm, made extremely well and well worth the money,
5
Pants work exactly as described, heats up fast and stays warm for a long time!
$63.97
WAS: $100.00*
This base layer fits quite well and adds noticeable warmth to my outdoor gear during the winter. ... Base layer kept me warm all day on mountain winter hikes in the
5
Jeff1540
If you play cold weather golf you really need to get the UA Cold Gear product. I like it because it ’s flexible and fairly warm.
5
Prof13
My Under Armour- UA Base 4. 0 XL fits perfectly. The waiste band is comfortable. The fabric is a great barrier to the damp cold air near Lake Michigan as I watch my son ’s Zion Benton High School ’s Varsity baseball games.
5
MattB13
Very warm. Different than the old waffle style. But they still work just the same.
5
Amazing pair of pants
I work outside. And theses pants are amazing.
5
Great material. Fits like a glove. Perfect for cold weather. True to size.
$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
$51.97
WAS: $70.00*
Keep me warm for skiing at 15 F ... He was looking for something new to layer his hunting gear with and these were perfect! ... Great gear to keep warm ... Excellent warm up leggings if you are working outside in the cold
5
Rickiuyv
I got a pair of this ones and i really like them specially to be worn under layers for extra cold days, good material and thin can be use with jeans.
5
Tawhid
This product has soft and comfortable fabric!
5
Proline1988
Whenever it's cold outside and I have to be out in the elements for extended periods I always wear UnderArmour products. Nithing words as good to help keep me warm. A bit pricey but we 'll worth the money.
5
Mf1969
Warm and comfortable sizing was good. Good on cold days for sure
5
Anne799
My son wears these under his uniform. He is so happy with the comfort and layering capabilities the material provides!
$115.00
I have been waiting for these for my entire life and I ca n't wait to go through this next ski season with a pair of base layer pants that actually fit me so I do n't have to worry about being uncomfortable or cold and I can focus on having fun with my friends and...
5
Mrsfry
[ I recently wore them under my jeans in Sweden and it was the perfect combo. I stayed the perfect temperature inside and outdoors while walking around in December. I would highly recommend.
5
Kpave
[ These fit so great! I ’ m plus sized and sometimes sizing can be wonky or vague but these are a dream. They are warm for sure but I can ’ t wait until The temperature dips to really put tgem to the test.
5
Maw maw Z
My legs will not be cold this winter. They are of good quality and very soft and warm.
4
Rmrst40
These base layers are awesome! Super comfortable and warm under snow gear or by themselves! If the price point wasn ’ t quite so steep I would live in these all winter long!
$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
$52.97
WAS: $70.00*
Perfect for under uninsulated ski pants. ... Easy to put on it ’s a base layer that you can wear as long johns under your clothes love ❤️ love love them ... These Under Armor base layer pants are
5
Barn girl
I bought these for my niece in fargo north Dakota. It's- 45 degrees around chill this week. She says they are great for the cold weather where she does out side work in a barn.
5
vanheelj4
My daughter uses this for Nordic skiing. Lightweight and keeps her warm without limiting mobility.
5
Mrs Marcellini
truly a must have warmer if you are a skier or like to be in cold weather! I had used these for years and I am so happy with them!!! Just buy! true to size, I am usually a XS/small and got a small on these.
5
Dmjdavis
These keep you so warm and they are so comfy
5
Soccermom7406
Fit true to size. Nice material
$72.97-$115.00
WAS: $115.00*
Solid base layer ... I love the base layer line of Smartwool. ... My son loves wearing thermal bottoms for skiing. ... Comfortable and they keep him warm on the snowy ski
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.
$19.99
these two- layer thermal bottoms provide warmth in cold conditions and make a great first layer when you really need to bundle up. ... two- layer thermal for warmth in cold weather flatlock seams to avoid irritation front fly lower...
5
jman151
I bought this for a snowboarding trip in Colorado. Excellent product. Kept me warm in the mountain.
5
IslanderAC
Fits true to size. Does the job in maybe 50- 60⁰ weather to keep your legs warm.
5
Ebaker187
Kept me warm on a 3 hour winter hike! It was about 25- 30 degrees out too.
5
Michael 7
I bought these to wear on those cold days on the golf course. Excellent purchase. Works as designed.
5
AkScott
I took the Duofold pants with me on a three week visit to a cool place. I went out on hour and a half to two hour hikes in temps from 30 to 45 degrees. My legs stayed warm even on rainy days.
$72.97-$115.00
WAS: $115.00*
and their heaviest weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away. ... slim fit 100% merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance fit updated to improve...
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.
$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
$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.
See Price in Cart
WAS: $125.00*
relaxed fit made with four way stretch for unlimited movement moisture transfer fibers move moisture away from skin to keep you dry upf 30 protection clima- wool fabrics boast superb breathability and temperature regulation for a comfortable
$90.00
relaxed fit stretch performance soft, comfortable body conforming fit durable midweight warmth in cool to cold conditions moisture transfer fibers move moisture away from skin to keep you dry odor resistant soft hand feel makes it easy to layer
$41.00
fit& design plush- back waistband gusset eases movement and reduces seam bulk mtf moisture transfer fibers to keep skin dry spun polyester is slightly brushed for extra softness double layer traps air between layers for extra warmth flat seam construction for seam...
$140.00
WAS: $150.00*
gusset for mobility and comfort flatlock seams to prevent friction hugs your body for a snug and secure base layer fit ... inseam: 75. 6cm ... knit™ body mapping technology to regulate body temperature without sacrificing
5
david d
The baselayer withstood the rigorous environment at Mount Kilimajaro and performed vey well.
5
Aeneas Dog
[ I wear every day at work! Really comfortable and warm!
$55.00
relaxed fit antimicrobial treatment to inhibit bacteria growth self covered elastic waistband anatomically designed shape with room to move moisture transfer fibers move moisture away from skin to keep you dry upf 30 protection soft, silky hand feel makes it easy to layer
$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.
$110.00
They are very comfortable and made with excellent quality. ... Nice fit and feel ... Excellent buy. ... My wife loves the fit and feel. ... stitched on adidas terrex woven branding made with natural and renewable materials as part of our journey to design out finite resources and help end plastic...
$24.99
Bought these for skiing to go under ski pants and worked well. ... pruf base layer pants 2- layer engineering traps air between layers to create barrier of warmth tagless design and flat seams for itch and chafe...
5
Lynn2025
I bought these for my son. He wears them every day and they keep him warm.
5
YOYO90
I love them they are thin not heavy for laying a must buy brand if you want thicker and warmer thermal get the same brand in expedition version military fleeced ok.
5
skiellen
Bought these for skiing to go under ski pants and worked well. Less expensive than most but did the trick. They do run large however. Large was huge!!! We ended up with a small for my son.
5
Socker mom1
Great product at a good price. We need to buy the shirt.
5
Tacomama
I bought these for my husband& he is very happy with the purchase
$24.97
WAS: $39.99*
Bought these to go under my golf pants, and kept me warm and didn ’ t restrict me at all ... Keeps the warmth in and is comfortable to wear even under dress
5
jaywik
great fit- actually works- kept me warm- I did n't even know i was wearing them
5
Jon1818
Bought these to go under my golf pants, and kept me warm and didn ’ t restrict me at all
5
Pops123
I bought these for my snow boarding son. He likes them even better than a much more expensive brand name pair he owns.
5
Lanz58
Keeps the warmth in and is comfortable to wear even under dress pants.
$19.99
outside layer: 70% polyester/ 30% merino wool ... inside layer: 100% cold ... pruf® technical fiber polyester with silvadur™ intelligent freshness ... comfort waistband rib cuffs front and back rise regular
5
Infa
Two days and then they got washed. They work great.
5
Lologyal29
I bought these for my husband. He needed new long John ’s, so I got him these. He normally wears a large, but I had to get a size smaller. He very happy with them especially since this cold snap we ’ re having is pretty bad.
5
Mike 8x6
Size up. Not bulky or heavy feeling. Keeps you warm. Have n't felt overheated. Good for single digit temps.
$37.00
midweight warmth, relaxed fit ... plush- back elastic waistband gusset eases movement and reduces seam bulk contrast stitching on waistband moisture transfer fibers to keep skin dry spun polyester is slightly brushed for extra softness flat seam construction for seam strength and longevity...
$24.99
these base layer pants are designed with a cotton/poly blend and two- layer engineering to keep you comfortable and provide warmth when you need it
$79.00
WAS: $89.00*
the discover family is overmeyer's top selling base layer collection featuring flat seam construction for comfort, a soft brushed interior, and fun one- of- a- kind colors and
5
Ah11
[ These tights were so lightweight but very warm. I 've been wearing them under shell snowpants and have stayed roasty toasty during all day skiing adventures!
$49.97-$60.00
WAS: $60.00*
My two kids( ages 11 and 8) love these and wear them both as pajamas and as base layers. ... Good wool base layer ... Very cozy and comfy. ... Perfect for outdoor school, or
5
Cindy
[ I bought this for my 6 yr old to wear for her first ski trip to wear under her bib. Worked perfectly! Not too thin and not too thick. She did n't even complain about it being itchy.
$64.95
fit and design interlock knit covered elastic waistband adds comfort flatlock seam construction designed to eliminate
5
Cindy
[ I bought this for my 6 yr old to wear for her first ski trip to wear under her bib. Worked perfectly! Not too thin and not too thick. She did n't even complain about it being itchy.
$37.97
WAS: $60.00*
Warm and flexible; perfect for skiing as a base layer! ... I bought the 2. 0 base layer a few years ago and they 're my go to long underwear for the extreme
5
Tracey2020
These under armor thermals are a family favorite.
5
Mcdavid97
The base layer fit comfortably nice and snug. It kept me very warm as I was skating out in the cold winter weather.
5
Jdog523
I 've been wearing under my pants and they 've kept me warm during 0 degree weather
5
Avery111
These are great for my winter garage workouts. Slim layer fit really well under joggers. I always size up for tights and they fit nicely. Great amount of stretch, which I really need as a dancer.
5
LP25
Bought these for my husband and he loves them. He has a couple 3. 0 sets and has worm then for a least 6 years. They wear great.
$59.95
great for layering ... dryride ultrawick™ birds eye mesh fabrication quick- drying and highly breathable ... regular fit crewneck long sleeve shirt tapered pants 180° stretch for enhanced mobility soft, everyday casual feel with lightweight knit that keeps them
$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
$97.97
WAS: $130.00*
Very snug and form fitting which is what I wanted for a ski base layer. ... Love this base layer pant to compliment the top. ... Super lightweight base layer that keeps me warm while snow camping and
5
abeck
[ I received these as a Christmas gift. I love them under my bibs for snowboarding! They ’ re tight but flexible and comfortable. They keep me warm on the mountain.
5
shellydk
[ I could go on and on about this whole line from Smartwool. It's their best thing in a very long time and I 've been a fan for years. The material is very soft, has a great but comfortable fit. These bottoms also have a nice wide and sturdy waste band so there is no bunching or other uncomfortable nonsense in that area. These are very warm, so perfect under a shell pant or bib for alpine skiing, but I do n't think I would wear them on a tour.
5
Hmae
[ Love the style. These are very warm and keep me toasty on those cold days. Would recommend to anyone looking for a quality under layers... very cute!
See Price in Cart
WAS: $120.00*
merino sport yarn provides durability and fast dry times of polyester ... slim fit to follow contours of the body 3d mapping results in near custom fit and movement freedom seamlessly knit mesh ventilation designed to keep you dry and comfortable size medium inseam: 21. 5
$97.97
WAS: $130.00*
Again, very well made and warm. ... Inside and outdoors, it's a great layer to be wearing. ... I no longer have to wear multiple layers underneath a uniform to stay
5
Peter
[ The Smartwool Men ’s Intraknit Thermal Merino Base Layer performs as described. In addition, it is not at all itchy, yet warm and comfortable.
5
Pflan
[ Comfort, comfort, comfort and warmth. Fit perfectly. Nice and snug Now that I have a pair I won ’ t ever go without. Buying additional colors now.
5
Kimmer13
[ The base layers I bought were too thick so I sent them back and ordered another set. They notified me immediately my return had been received and the refund quickly followed. Great prices!
5
SeanT
[ Perfect fit and super soft! But these as a base layer and will be what I wear going forward. I also have two Smartwool tops that are amazing!
4
Zeejet
[ An excellent product with a compromise between the benefits/draw- back of PE and merino fabrics. My main criticism is the extremely high- cut waist that rides all the way up to the belly button. It should be about two inches shorter than it currently is. Fit( Men's Medium): Great in the legs but unusually high waist band. I 'm 5' 9 '', 165lb, 31 '' Waist, Climber's Build. Pros:+ Excellent wicking and drying times+ Warm+ Quality build Cons:- Unusual cut and fit at the waist- While already very soft to the touch, just a tad coarse compared to Icebreakers products.
$89.97
WAS: $120.00*
In general my favorite long underwear especially for skiing and does n't get weird stretchy like the classic smartwool longjohns which is wonderful. ... Perfect for skiing, keeping bulk out of the boots but not bunching up on the
4
Skippy
[ I ’ m a big fan of smartwool and needed new tights. These fit great and are actually not too long on my legs. I ’ m only 4 ’ 11 ” so that is usually an issue. They also fit my wide calves well.
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