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Stay warm and comfortable during the coldest months with the best long underwear for men. Designed for optimal insulation and moisture-wicking properties, these essentials provide the perfect base layer for any outdoor activity. Featuring soft, breathable fabrics and a snug fit, they ensure maximum mobility and comfort throughout the day. Whether you're skiing, hiking, or simply lounging at home, our collection offers a variety of styles to keep you cozy. Embrace the chill with confidence and enjoy the ultimate warmth and protection.
$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
$34.99
fabric weight: 5 oz. ... pruf® technical fiber polyester with silvadur™ intelligent freshness ... 100% cold ... single layer, lightweight fleece rib cuffs drop tail for added protection against cold regular
$19.99
WAS: $24.99*
60% combed ring spun cotton, 40% polyester fabric weight: 5. 25 oz. ... two- layer engineering traps air between layers providing a natural barrier of warmth tagless design and flat seams provide a smooth fit and extra comfort rib cuffs and drop tail for added protection against
5
LALO4U
This is great for people who work outside keeping you warm and comfortable
5
nickname111111
i get cold easily. this helps. thank you very much
5
Ore76
I purchased this also for my father and he just loves it.
$67.97
WAS: $90.00*
. feels good next to the skin ... This will be a great base layer for cold weather and great outer layer when the temps are cool or warmer. ... Bought a month ago and will use all
5
mwo131313
If you need a high- performance base layer for extreme cold, the UA Base 4. 0 ¼ Zip is one of the best options out there. Just bought my second one.
5
M2024
Great base layer, warm and comfortable
5
Jasonwithg
Good quality nice and warm
5
JKT91
amazingly, surprisingly warm.
5
Lawrence45
Purchased a Large. The fit& feel is nice. Only issue is it maybe a little too tight in forearms( if you like to roll- up your sleeves).
$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!
$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.
$39.99
WAS: $44.99*
outside layer: 70% polyester/ 30% merino wool ... inside layer: 100% cold ... comfort waistband rib cuffs front and back rise regular fit ... two- layer engineering traps air between layers providing a natural barrier of warmth fabric weight: 7
See Price in Cart
WAS: $155.00*
this bulk- free, 100% merino wool thermal layer brings a new dimension to active winter wear ... insulation, articulation, and ventilation are seamlessly integrated to help with movement and comfort during high- intensity
$39.99
WAS: $44.99*
rib cuffs drop tail for added protection against cold regular
$115.00
the technical benefits of 100% merino wool will help you keep your game at a high level for longer. ... 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...
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.
$44.99
crewneck long sleeves concealed thumb loops hold the sleeves in place mid- weight polyester and wool blend keeps you warm and regulates temperature smooth flatlock seams reduce chafing tagless
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
$55.00
Best set I 've ever owned ... these compression tights were perfect for training sports, bought these for running and they sure do keep me warm on cooler mornings and
5
MamaToHayden
I purchased this for my boyfriend for Christmas and he loves it! He wears this for all his outdoor activities and he is never cold.
5
MamaChiTown5
True to size, comfortable. My son wears them while playing soccer.
5
Andrew E2
Got this gear to wear on those super cold days under the snow pants. They are thin and skin forming enough to not impact the fit of the boot along the lower leg( big deal for performance skiing) and warm enough to keep you on the mountain.
5
Ball pro
These leggings are comfortable to wear for everyday as well as sporting activities
5
Personal4
Great product for baseball and other sports. Works well I. Texas weather
$19.99
Nothing feels better than wearing long underwear during these long, cold, New Hampshire winters. ... Best$ 20. 00 I spent. ... Duofold Thermals Are The Best! ... Great for long
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.
$36.00
quad- blend fabric technology allows heat retention to keep you warm ... relaxed fit long sleeve shirt ultra- soft brushed interior offers all- day comfort and warmth true comfort stretch for ease of movement non- deforming design helps hold the shape tag- free design provides a fuss- free wear...
$36.00
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
See Price in Cart
WAS: $115.00*
add one of smartwool's best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or
$49.99
My husband needed a new pair of long underwear for work, and he loves them. ... the best thing a man could wear in the winter and around the house plus when being in a hotel and holidays the winter support is great becuse things move
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
$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.
$106.00
regular fit wind resistant soft, brushed fleece backing four way stretch gives you total freedom of movement durable smooth outer face for easy layering gusset eases movement and reduces seam bulk covered elastic waistband for added warmth& comfort no fly front upf 40
$159.99
I like to exercise outside all year long and got tired of cold legs. ... The warmth is good for me ... I usually love blasting the AC and can still wear these pants for the perfect
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.
$115.00
The best. ... My son loves wearing thermal bottoms for skiing. ... Solid base layer ... Keep me warm in the mornings as I 'm putting gear on, stays cool as I skin up the
5
Wesley on the Rocks
[ I highly recommend these for all of your snow adventures. I wear mine directly under my snow pants and they work perfectly for warmth and movement. This base layer helped me survive snowboarding in both Colorado and Canada. Buy a pair, its worth every penny!
5
Jordan
[ I ’ ve worn this pair of wool pants as a base layer a couple of times in the snow and stayed warm. They fit and feel great! I definitely recommend!
5
Joe1
[ Bought two pairs of these for a snow trip. Great feel and regulated temp perfect. Alternated the pairs and neither smelled after solid week+ of use.
5
Littlemisstexas
[ Purchased this for someone. They gave a thumbs up. I personally own a pair of women ’s smart wool. Money well spent. They last a long time, and they ’ re as comfortable as it gets.
5
Chris K
[ I bought this base layer bottom for a ski trip to Colorado. This did a great job keeping me warm in the cold mornings and wicking sweat away in the warmer afternoons.
$130.00
insulation, articulation and ventilation are seamlessly integrated to amplify movement and comfort during high- intensity activities ... 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...
$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
slim fit light weight merino jersey fabric uses a nylon core to increase durability while still keeping 100% merino wool next to skin fully functional fly merino- lined, 1. 5 ”( 4 cm) wide elastic waistband designed for maximum comfort flatlock seam construction designed to minimize chafing fit...
$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
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
$29.99
Thermal bottoms keeping me warm ... This is the first time I 've purchased or worn these pants and I like how they feel. ... Wonderful fitting thermal bottoms arrived just in time for the
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.
$77.97
WAS: $130.00*
I no longer have to wear multiple layers underneath a uniform to stay warm. ... Again, very well made and warm. ... Inside and outdoors, it's a great layer to be
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.
$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
$11.97
WAS: $19.99*
crew top long sleeves baselayer thermal for maximum warmth rib cuffs for a secure fit ... Very comfortable and soft. ... The fit is perfect, it ’s warm and
$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.
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