Lightweight Long Underwear

Stay warm and comfortable with our collection of lightweight long underwear, designed for optimal layering in cooler weather. Crafted from breathable, moisture-wicking fabrics, these essentials provide warmth without the bulk, making them perfect for outdoor activities or lounging at home. Enjoy a snug fit that moves with you, ensuring maximum flexibility and comfort throughout your day. Ideal for both active and casual wear, our lightweight long underwear keeps you cozy while maintaining a sleek profile. Embrace the cold with confidence and style!

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13 products
View:  All|13 Products
On Sale
Under Armour Men's Packaged Base 2.0 Baselayer Leggings
  • Black/Pitch Gray

Under Armour Men's Packaged Base 2.0 Baselayer Leggings

$28.48

WAS: $60.00*

(73)

I bought the 2. 0 base layer a few years ago and they 're my go to long underwear for the extreme cold. ... fit fitted baselayer leggings inseam: 30 1/2 ” technology ua base™ 2. 0 active baselayer is lightweight, flexible, and breathable for high activity...

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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.

On Sale
Under Armour Men's Packaged Base 2.0 Crewneck Baselayer
  • Black/Pitch Gray

Under Armour Men's Packaged Base 2.0 Crewneck Baselayer

$33.73

WAS: $60.00*

(62)

fit fitted baselayer technology ua base™ 2. 0 active baselayer is lightweight, flexible, and breathable for high activity performance in cool conditions moisture transport system wicks sweat and dries quickly ua scent control prevents the growth of odor causing microbes to keep you...

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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.

Smartwool Men's Merino 250 Baselayer Bottom
  • Black

Smartwool Men's Merino 250 Baselayer Bottom

$61.97-$115.00

WAS: $115.00*

(58)

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

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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.

Smartwool Merino 150 Baselayer Pants
  • Black

Smartwool Merino 150 Baselayer Pants

$90.00

Quick Facts

slim fit to contour to you lightweight merino jersey fabric flatlock seam construction fully functional fly merino- lined elastic waistband ... beautiful color; soft so comfortable

Halfdays Women's Ruth Lightweight  Merino Leggings

Halfdays Women's Ruth Lightweight Merino Leggings

$115.00

Quick Facts

designed for- 30° f- 60° f temperature range machine wash cold inside out with like colors do not bleach or use fabric softeners lay flat to dry do not

Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve Top
  • Black

Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve Top

$63.97-$85.00

WAS: $85.00*

(1)

with core spun technology, smartwool has wrapped lightweight merino around a nylon core for added durability, while still keeping the comfort of ultra- soft, responsibly- sourced merino next to

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5 MAJB
Great quality, ordered for my husband for Christmas. He loved it... would order again.

Smartwool Men's Classic All-Season Merino Baselayer Bottoms
  • Black

Smartwool Men's Classic All-Season Merino Baselayer Bottoms

$63.97-$85.00

WAS: $85.00*

Quick Facts

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...

Smartwool Men's Classic Thermal Merino Base Layer Bottoms
  • Black

Smartwool Men's Classic Thermal Merino Base Layer Bottoms

$61.97-$115.00

WAS: $115.00*

(3)

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...

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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.

Smartwool Men's Classic All-Season Merino Base Layer 1/4 Zip Long Sleeve Top
  • Black

Smartwool Men's Classic All-Season Merino Base Layer 1/4 Zip Long Sleeve Top

$90.00

Quick Facts

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

SmartWool Women's Merino 150 Base Layer Bottoms
  • Black

SmartWool Women's Merino 150 Base Layer Bottoms

$90.00

(2)

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 ”

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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

Adidas Men's Xperior Merino 200 Baselayer Leggings
  • Grey Five

Adidas Men's Xperior Merino 200 Baselayer Leggings

$110.00

Quick Facts

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...

Smartwool Kids' Classic Thermal Merino Base Layer Crew
  • Power Pink

Smartwool Kids' Classic Thermal Merino Base Layer Crew

$64.95

(5)

fit and design interlock knit crew neck with set- in long sleeves flatlock seam construction designed to eliminate

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5 Toasty
[ I bought these for my grandson for skiing and he likes to wear them like a sweater at times. What more do you want, warmth and some style. He loves them.

5 Nana
[ I purchased these for my grand daughters, to provide extra warmth without extra bulk, for our cold Michigan winters. They love sledding, playing in the snow and hiking with their mom, dad and brothers.

5 bethr524
[ I bought this Smartwool baselayer top because I really needed something that would wick the sweat away when I was exercising outdoors on those chilly days. This top does exactly what I want. It's soft and comfortable and keeps my core dry even when I sweat beneath other layers. It washes up easily and does n't retain odors. I 'm very happy with this item.

5 WI_Dad
[ Bought for our 5 year old daughter to use while skiing in UT. She is very picky about colors and general comfort but she loved this smart wool baselayer. So far has held up to washing as well. Will buy another when she outgrows this one.

On Sale
Obermeyer Women's Discover Baselayer Tights
  • Navy

Obermeyer Women's Discover Baselayer Tights

$79.00

WAS: $89.00*

(3)

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

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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!

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