Breathable Long Underwear

Stay comfortable and warm with our collection of breathable long underwear. Designed for optimal moisture-wicking and temperature regulation, these essentials keep you dry and cozy during any outdoor activity. Crafted from lightweight, stretchy materials, they offer a snug fit without sacrificing mobility. Perfect for layering under your favorite winter gear, our breathable long underwear ensures you can enjoy the cold weather without discomfort. Explore our selection to find the ideal base layer for your next adventure.

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82 products
View:  48All|82 Products
Duofold Men's Thermal Baselayer Pants
  • Black

Duofold Men's Thermal Baselayer Pants

$19.99

SmartWool Women's Intraknit Active Base Layer Bottoms
  • Black

SmartWool Women's Intraknit Active Base Layer Bottoms

$110.00

Watson's Men's HEAT Thermal Baselayer Pants
  • Black

Watson's Men's HEAT Thermal Baselayer Pants

$36.00

Smartwool Women's Classic Thermal Merino Baselayer Bottoms

Smartwool Women's Classic Thermal Merino Baselayer Bottoms

$115.00

Smartwool Merino 150 Baselayer Pants
  • Black

Smartwool Merino 150 Baselayer Pants

$90.00

On Sale
Smartwool Men's Classic Thermal Merino Base Layer Bottoms
  • Black
  • Deep Navy
  • Charcoal Heather

Smartwool Men's Classic Thermal Merino Base Layer Bottoms

$85.97-$115.00

WAS: $115.00*

Carhartt Women's Base Force Midweight Tech Baselayer Bottoms
  • Black

Carhartt Women's Base Force Midweight Tech Baselayer Bottoms

$44.99

On Sale
Smartwool Women's Intraknit Thermal Merino Baselayer Leggings
  • Black/White

Smartwool Women's Intraknit Thermal Merino Baselayer Leggings

$97.97

WAS: $130.00*

On Sale
Smartwool Men's Intraknit Thermal Merino Base Layer Bottom
  • Black White

Smartwool Men's Intraknit Thermal Merino Base Layer Bottom

$97.97

WAS: $130.00*

On Sale
Smartwool Men's Classic All-Season Merino Baselayer Bottoms
  • Iron Heather
  • Black

Smartwool Men's Classic All-Season Merino Baselayer Bottoms

$63.97-$85.00

WAS: $85.00*

SmartWool Women's Intraknit Active Base Layer Long Sleeve Shirt
  • Black

SmartWool Women's Intraknit Active Base Layer Long Sleeve Shirt

$110.00

On Sale
Under Armour Men's Base 4.0 Long Sleeve Baselayer
  • Black/Pitch Gray

Under Armour Men's Base 4.0 Long Sleeve Baselayer

$74.97

WAS: $100.00*

icebreaker Men's 125 ZoneKnit Merino Thermal Long Sleeve Shirt
  • Black
  • Ether
  • Fathom Green/Cloud Ray/Cb

icebreaker Men's 125 ZoneKnit Merino Thermal Long Sleeve Shirt

$100.00

On Sale
Smartwool Women's Intraknit Thermal Base Layer 3/4 Leggings
  • Black White

Smartwool Women's Intraknit Thermal Base Layer 3/4 Leggings

$89.97

WAS: $120.00*

Watson's Men's PERFORMANCE Thermal Baselayer Pants
  • Black

Watson's Men's PERFORMANCE Thermal Baselayer Pants

$30.00

Carhartt Women's Force Midweight Waffle Baselayer Pant
  • Black

Carhartt Women's Force Midweight Waffle Baselayer Pant

$34.99

On Sale
Smartwool Men's Intraknit Thermal Max Merino Base Layer Three-Quarter Bottom
  • Black White
  • Charcoal Heather/Black

Smartwool Men's Intraknit Thermal Max Merino Base Layer Three-Quarter Bottom

See Price in Cart

WAS: $120.00*

Hot Chillys Men's 3D Knit Bottoms
  • Black

Hot Chillys Men's 3D Knit Bottoms

$90.00

Carhartt Men's Force Heavyweight Base Layer Bottoms
  • Shadow Heather

Carhartt Men's Force Heavyweight Base Layer Bottoms

$54.99

On Sale
Obermeyer Women's Discover Baselayer Tights
  • Navy

Obermeyer Women's Discover Baselayer Tights

$79.00

WAS: $89.00*

New
Carhartt Men's Forces Midweight Micro-grid Base Layer Bottoms
  • Black

Carhartt Men's Forces Midweight Micro-grid Base Layer Bottoms

$44.99

On Sale
Under Armour Women's Base 4.0 Long Sleeve Baselayer
  • Black/Pitch Gray

Under Armour Women's Base 4.0 Long Sleeve Baselayer

$74.97

WAS: $100.00*

Carhartt Women's Base Force Heavyweight Baselayer Pants
  • Shadow Heather

Carhartt Women's Base Force Heavyweight Baselayer Pants

$49.99

On Sale
Hot Chillys Men's Clima-Wool Merino Bottom
  • Nightfall
  • Od Green

Hot Chillys Men's Clima-Wool Merino Bottom

See Price in Cart

WAS: $125.00*

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

$44.97

WAS: $60.00*

Hot Chillys Youth Pepper Bi-Ply Tights
  • Black

Hot Chillys Youth Pepper Bi-Ply Tights

$41.00

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

Adidas Men's Xperior Merino 200 Baselayer Leggings

$110.00

Burton Kids' Lightweight Baselayer Set
  • True Black

Burton Kids' Lightweight Baselayer Set

$59.95

On Sale
Smartwool Women's Classic Thermal Merino Baselayer Long Sleeve Shirt

Smartwool Women's Classic Thermal Merino Baselayer Long Sleeve Shirt

$85.97-$115.00

WAS: $115.00*

On Sale
Under Armour Men's Packaged Base 3.0 Baselayer Leggings
  • Black/Pitch Gray

Under Armour Men's Packaged Base 3.0 Baselayer Leggings

$51.97

WAS: $70.00*

On Sale
Carhartt Men's Force Lightweight Stretch Base Layer Pants
  • Black

Carhartt Men's Force Lightweight Stretch Base Layer Pants

See Price in Cart

WAS: $34.99*

Carhartt Men's Force Mid-Weight Wool Blend Base Layer Pants
  • Black Heather

Carhartt Men's Force Mid-Weight Wool Blend Base Layer Pants

$49.99

On Sale
Smartwool Men's Merino 250 Baselayer Bottom
  • Black
  • Charcoal Heather
  • Deep Navy

Smartwool Men's Merino 250 Baselayer Bottom

$85.97-$115.00

WAS: $115.00*

DSG Men's Cold Weather Compression Tights with Pocket

DSG Men's Cold Weather Compression Tights with Pocket

$45.00

Smartwool Men's Intraknit Thermal Merino Base Layer Crew Neck Long Sleeved T-Shirt
  • Charcoal Black
  • Black/White
  • Winter Moss

Smartwool Men's Intraknit Thermal Merino Base Layer Crew Neck Long Sleeved T-Shirt

$130.00

Under Armour Men's ColdGear OG Leggings
  • Black/White
  • White/Black

Under Armour Men's ColdGear OG Leggings

$60.00

On Sale
Under Armour Men's Packaged Base 4.0 1/4 Zip Baselayer
  • Black/Pitch Gray

Under Armour Men's Packaged Base 4.0 1/4 Zip Baselayer

$67.97

WAS: $90.00*

On Sale
Under Armour Men's Packaged Base 4.0 Baselayer Leggings
  • Black/Pitch Gray

Under Armour Men's Packaged Base 4.0 Baselayer Leggings

$74.97

WAS: $100.00*

SmartWool Women's Merino 150 Base Layer Bottoms
  • Black

SmartWool Women's Merino 150 Base Layer Bottoms

$90.00

Smartwool Youth Merino 250 Baselayer Bottom
  • Power Pink

Smartwool Youth Merino 250 Baselayer Bottom

$49.97-$60.00

WAS: $60.00*

icebreaker Women's 125 ZoneKnit Long Sleeve Thermal Crew
  • Jet Hthr/Blk/Mtro Hthr/Cb

icebreaker Women's 125 ZoneKnit Long Sleeve Thermal Crew

$125.00

Smartwool Women's Intraknit Thermal Merino Crew Baselayer Top
  • Black/White
  • Black White Stripe
  • Nightfall Blue/Deep Navy

Smartwool Women's Intraknit Thermal Merino Crew Baselayer Top

$130.00

SmartWool Youth Classic Thermal ¼ Zip Base Layer
  • Rhythmic Red

SmartWool Youth Classic Thermal ¼ Zip Base Layer

$65.00

On Sale
Smartwool Women's Merino 250 Pattern Baselayer Bottom
  • Blueberry Hill Mtn Scape

Smartwool Women's Merino 250 Pattern Baselayer Bottom

$82.97

WAS: $110.00*

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

$44.97

WAS: $60.00*

On Sale
Under Armour Men's Packaged Base 3.0 Crewneck Baselayer
  • Black/Pitch Gray

Under Armour Men's Packaged Base 3.0 Crewneck Baselayer

$51.97

WAS: $70.00*

Smartwool Kids' Classic Thermal Merino Base Layer Bottom
  • Cascade Multi Stripe

Smartwool Kids' Classic Thermal Merino Base Layer Bottom

$64.95

ColdPruf Men's Expedition Long Sleeve Crew Base Layer Shirt
  • Black

ColdPruf Men's Expedition Long Sleeve Crew Base Layer Shirt

$34.99

SmartWool Merino 150 Base Layer Long Sleeve Shirt
  • Black

SmartWool Merino 150 Base Layer Long Sleeve Shirt

$90.00

On Sale
Icebreaker Men's ZoneKnit 200 Leggings
  • Black/Jet Hthr/Cb

Icebreaker Men's ZoneKnit 200 Leggings

$140.00

WAS: $150.00*

Adidas Men's Terrex Xperior Merino 150 Baselayer Long-Sleeve Top
  • Grey Five

Adidas Men's Terrex Xperior Merino 150 Baselayer Long-Sleeve Top

$100.00

On Sale
Smartwool Women's Merino 250 Baselayer Leggings

Smartwool Women's Merino 250 Baselayer Leggings

$85.97-$115.00

WAS: $115.00*

Carhartt Men's Force Mid-Weight Micro-Grid Base Layer Pants
  • Black

Carhartt Men's Force Mid-Weight Micro-Grid Base Layer Pants

$51.99

On Sale
Smartwool Men's Merino Classic All-Season Base Layer Long Sleeve
  • Black
  • Iron Heather

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

See Price in Cart

WAS: $90.00*

On Sale
Under Armour Women's Base 3.0 Baselayer Leggings
  • Black/Pitch Gray

Under Armour Women's Base 3.0 Baselayer Leggings

$52.97

WAS: $70.00*

ColdPruf Women's Premium Performance Pant
  • Heather Gray

ColdPruf Women's Premium Performance Pant

$29.99

On Sale
Smartwool Men's Intraknit Thermal 1/4 Zip
  • Winter Moss
  • Deep Navy

Smartwool Men's Intraknit Thermal 1/4 Zip

See Price in Cart

WAS: $155.00*

Patagonia Women's Capilene Midweight 1/2 Zip Baselayer Top
  • Black

Patagonia Women's Capilene Midweight 1/2 Zip Baselayer Top

$99.00

Under Armour Women's ColdGear Authentics Leggings
  • Charcoal Light Heather
  • Black
  • Midnight Navy

Under Armour Women's ColdGear Authentics Leggings

$55.00

ColdPruf Women's Quest Performance Base Layer Leggings
  • Black

ColdPruf Women's Quest Performance Base Layer Leggings

$39.99-$41.99

SmartWool Men's Classic Thermal Merino 1/4 Zip Base Layer
  • Charcoal/Honey Gold

SmartWool Men's Classic Thermal Merino 1/4 Zip Base Layer

$145.00

On Sale
Smartwool Women's Intraknit Thermal Merino Pattern Baselayer Top
  • Black
  • Deep Navy

Smartwool Women's Intraknit Thermal Merino Pattern Baselayer Top

$96.97-$130.00

WAS: $130.00*

On Sale
Under Armour Women's Base 4.0 Baselayer Leggings
  • Black/Pitch Gray

Under Armour Women's Base 4.0 Baselayer Leggings

$74.97

WAS: $100.00*

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

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

$63.97-$85.00

WAS: $85.00*

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On Sale
Smartwool Women's Merino 250 Baselayer Top

Smartwool Women's Merino 250 Baselayer Top

See Price in Cart

WAS: $115.00*

On Sale
Smartwool Men's Classic Thermal Merino Base Layer Crew Top
  • Black
  • Winter Moss Heather
  • Black Color Shift

Smartwool Men's Classic Thermal Merino Base Layer Crew Top

$85.97-$115.00

WAS: $115.00*

On Sale
Smartwool Women's Merino 250 Pattern Crewneck Baselayer Top
  • Light Gray Mountain Scape
  • Festive Fuschia Mtnscape
  • Honey Gold Dot

Smartwool Women's Merino 250 Pattern Crewneck Baselayer Top

$82.97-$110.00

WAS: $110.00*

Smartwool Women's Merino 250 1/4 Zip Baselayer Top
  • Black

Smartwool Women's Merino 250 1/4 Zip Baselayer Top

$120.00

Smartwool Women's Thermal Merino Crew
  • Arctic Green Heather
  • Toasted Coconut Heather
  • Charcoal Heather

Smartwool Women's Thermal Merino Crew

$120.00

Smartwool Men's Intraknit Merino 200 Pattern Crewneck Baselayer Top
  • Honey Gold Mountain

Smartwool Men's Intraknit Merino 200 Pattern Crewneck Baselayer Top

$130.00

Smartwool Women's Merino 250 Pattern 1/4 Zip Baselayer Shirt
  • Jade Marble

Smartwool Women's Merino 250 Pattern 1/4 Zip Baselayer Shirt

$115.00

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

Smartwool Kids' Classic Thermal Merino Base Layer Crew

$64.95

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