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Discover the essential base layer clothing for hiking, designed to keep you comfortable and dry on the trails. Our collection features moisture-wicking fabrics that efficiently manage sweat, ensuring you stay warm in cooler temperatures and cool during intense hikes. With lightweight and breathable options, these base layers provide the perfect foundation for your outdoor adventures. Enjoy a snug fit that allows for easy layering, enhancing your overall performance and comfort. Gear up for your next hike with high-quality base layers that support your active lifestyle.
$56.23
WAS: $100.00*
I love the fit of under armour women ’s clothing. ... Warm and comfortable layer, washes well with no shrinkage or pilling. ... Great base layer ... I love it besides the thumb
5
Mom2025
Got this for my daughter, she is a teacher. Her room is cold and then she has bus duty periodically. So the 4. 0 is perfect for being somewhat sedentary. Surprisingly, actually keeps her warm! She is a chilly person normally, so cold temps are miserable for her. We 've tried many products. The Under Armour is work the investment!
5
KarenK11
I am always cold. This is the solution! Love it!
5
East Coaster
These are the best long underwear going. I mind the cold but not when wearing these.
5
Jea970
The fit is loose but not so lose that I would exchange for a smaller size. The shirt is warm but not too warm when inside. Outside it keeps me toasty at 30 degrees and I ’ m always complaining of being cold. All in all, I ’ m very happy with this purchase.
5
I recently purchased the Under Armour Base 4. 0 Crew, and it's exceeded expectations. This top delivers comfort, warmth, and performance.
$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
$51.99
dry technology wicks sweat and dries fast rugged flex stretch technology is built to move odor- fighting technology ... force fast ... crewneck long sleeves concealed thumb loop holds the sleeves in place strategic paneling provides breathability smooth flatlock seams reduce chafing tagless label...
5
Ecko
It's a great fit i will get another one but this time in medium size. It's a hit& miss on my end.
$19.99
Kept me warm on a 3 hour winter hike! ... these two- layer thermal bottoms provide warmth in cold conditions and make a great first layer when you really need to bundle
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.
$31.48
WAS: $60.00*
Each of the Cold Gear Base Layers, base layer, base layer 2. 0 and base layer 3. 0 are great. ... Very warm clothing. ... I was able to move freely and warm, its a great first
5
Micheile
Feels great keeps you warm
5
NHummingbird
Very comfortable and good for mild to moderate cold weather. I would recommend
5
Brian31
This 2. 0 is comfortable and warm. Perfect baselayer to shred the slopes with. Wicks moisture as advertised. Awesome shirt
5
Jeff H 150
Great fit and very comfortable. Very warm when out in the elements but not too hot while working inside. Would definitely buy another one.
5
Kpax1
This base layer is warm, comfortable and lightweight.
$32.98
WAS: $70.00*
Excellent base layer for any outdoor sport!! ... Perfect for winter ... I work snow removal and this was perfect to wear. ... Warm and toasty ... Warm& Comfortable ... Keeps my legs toasty and
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.
$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.
$85.00
a modern lightweight top that brings natural style to your trail adventures 100% merino wool fibers regulate body temperature and naturally resist odor mock neck and offset shoulder seams for more coverage and to prevent friction wider shoulders to accommodate a backpack cropped
5
JD
[ Great for both casual and activities. It looks better than a typical tank top cut, and it is a little see- through. But for summer this is a great piece.
$44.99
dry® technology lining wicks away sweat rugged flex® technology moves with you fights odors flocked seams and tagless label add to overall comfort zip pocket on chest concealed thumb
5
Kaiii
[ Carthatt is a quality brand that is made affordable. I used this for my snow trip and it gave me warmth so I do n't have to layer too much. Very satisfied with my purchase!
5
Bobby
[ I knew I was getting a good shirt because this is my second one. It fits snug enough to keep out the wind. It wicks and dries like an athletic shirt. Since it is 100% polyester, it is likely more durable than most. It keeps its shape and looks better than most.
5
BD592
[ Best value for your money as far as base layers go. You can spend 3x more on Smartwool or Icebreaker if you are looking for the best with a hefty price tag. Overall, this lives up to Carhartt ’s name
5
valleygirlvamp
[ I bought these for my husband who happens to love Carhart. Moosjaw had the most competitive pricing and shipping rates. The product got here fast, and safety packaged.
5
Josh
[ I have purchased a half dozen Carhartt Base Force crew shirts. Yes, they 're expensive. Yes, they 're worth it. They keep me extraordinarily warm, and they 're very comfortable. They 're worth every penny you 'll spend. Buy one for your dad, too. He 'll appreciate it!
$61.97-$115.00
WAS: $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.
$99.00
slim fit zip- neck styling with internal neck tape for added comfort; locker loop for hang drying raglan shoulder seams allow freedom of movement, with full underarm gusset for range of motion and chafe- free comfort long center- front zipper vents body heat and is backed by kissing welts for low-...
5
Se3smith
[ Thin, warm and true to size! The purple is a darker color. Which is nice. Can wear as a base layer or stand alone top. Ive worn skiing and tennis!
5
AB9182
[ This is the second capilene layer that I ’ ve purchased, love wearing this in cool weather or as a base layer when I ’ m skiing. I ’ ve had my first for a while and has maintained its fit.
$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
$63.97-$85.00
WAS: $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.
$130.00
super comfy and a perfect base layer ... The PERFECT base layers for warmth AND style. ... Best base layer I own! ... Ca n't beat these base layers! ... Perfect base
5
Chris
[ Bought the set for my girlfriend and she absolutely loves it. Fits great and would highly recommend.
5
K Nicholson
I purchased this top( and the leggings together as a set). Altogether, it is one of the better base layer fits I ’ ve had the chance to try out in the elements. Overall the top is probably my favorite piece, not only because of the high quality materials used- but because of the sleeve length. As a tall/lanky girly, some genuine long sleeves are always greatly appreciated. The style is also a great plus, the outfit goes with pretty well everything( purchased in black for this reason). The outfit looks great together, but they can also be interchanged with other pieces and they still look awesome all while keeping you warm:)
5
Molly
I bought the fay mid weight base layer top and bottoms and they ’ re perfect. They ’ re so flattering and cute on their own and keep me so warm
5
Natalie
Fit is perfect, it ’s super comfortable- no tugging or readjusting needed throughout the day. Warm without overheating. And it goes so well with my navy ski gear from Halfdays. I always get compliments on the slopes!
5
edmistja
I wear this for outdoor exercise, as an everyday mockneck, and even as a pajama top. Well performing and well constructed. Love the color too.
$61.97-$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.
$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
$90.00
I 've taken my base layers out on two blustery, cold hikes now, and they 've done an excellent job of protecting me and keeping me warm without making me feel clumsy or
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 😊
$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.
$80.00
fit& design regular fit long- sleeved lightweight top for hiking and travelling in warm sunny climates embroidered logo on the chest round neckline made of moisture wicking and quick drying polyester jersey partly recycled panels under the arms for freedom of movement shoulder seams moved back to...
$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
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
See Price in Cart
WAS: $120.00*
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 flatlock seam construction to help minimize chafing as well as help keep you comfortable and temperature-...
$92.00
relaxed fit four way stretch for unlimited movement activated carbon enhances thermal regulation and odor blocking properties upf 30 protection moisture transfer fibers move moisture away from skin to keep you dry soft hand feel makes it easy to layer
5
Bevshaffer
[ Love this. I wore it under a ski jacket for snow skiing and it was super comfortable warm and fits great. I ’ m 5 ’ 2 ” and 140 pound and a medium fit great.
$100.00
slim fit can be worn as a baselayer or as is crewneck for easy on and off soft and breathable material with cooling feel flatlock seams to help seal in heat single- jersey fabric soft, lightweight material will keep you comfortable all day long longer in back, the curved hem keeps you covered on...
5
Nikki12
Very comfortable shirt highly recommended by a size bigger as they run small
5
Dark55
Very light and weight and easy to move around in it
5
Matt09
Great shirt stands out in every way possible very light just had to upsize a size
5
Joey
I ’ m a taller guy and kinda of thinner but this shirt fit me perfect. Also hugged my chest really well and made me feel like a specimen. It ’s a bit expensive for base layer but I will be buying more of these for sure.
5
Wandabelle
He loves the gift and been wearing it in the summer when not too hot. Material is great quality.
$70.00-$75.00
WAS: $75.00*
This has been my favorite hiking layer since it arrived a month ago. ... The perfect hiking half- zip! ... I appreciate the zip top because it can either be worn up or down as the weather
5
Oregon
Perfect light weight zip shirt- great comfortable fabric
5
Bob
I can swim laps in this shirt and wear it to a restirant
$109.00
It's a perfect base layer for resort and backcountry skiing. ... A great base layer ... Does n't get too hot on the uphill compared to the heaver weight merino baselayers I have, still keeps my warm enough, easy to layer with, really enjoying
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.
$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
$75.00
relaxed fit for casual or performance wear midweight base layer design for ultimate comfort and warmth hot chillys® reflective logo on left sleeve crewneck design provides a nonrestrictive
$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
See Price in Cart
WAS: $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. ... size medium center- front zipper: 10 '' ''( 25 cm) machine wash warm gentle cycle wash with like colors do not bleach tumble dry low cool iron as needed do not...
$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
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