Base Layer & Thermal Underwear

33% Off

$29.99

~~$45.00~~

The Thermolator 2.0 Crew Neck Top is the ideal piece for all day warmth and comfort while being out in the elements. This versatile piece features an ultra-soft, midweight fabric utilizing our fe...

33% Off

Terramar ThermaSilk CS Silk Lightweight Long Sleeve Crew Shirt - Men's

$40.20

~~$60.00~~

Over forty years ago Terramar was the first company to introduce pure silk performance base layer products. Today, Thermasilk is still the standard for people wanting a natural and breathable gar...

25% Off

Coldpruf Platinum II Midweight Underwear Crew Shirt - Men's

Black long-sleeve shirt on a white background

$29.99

~~$40.00~~

Your TRUSTED base layer REBUILT for the MODERN ADVENTURE. Inside Layer: 100% ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness Outside Layer: 70% polyester / 30% MERINO WOOL...

SmartWool Merino 250 Baselayer Crew - Men's

$115.00

Meet the better-than-ever Men's Merino 250 Base Layer Crew. We've updated this 100% Merino wool fan-favorite with new colors and a new fit to improve functionality while enhancing aesthetics. Shoul...

27% Off

Terramar Ecolator CS 3.0 Long Sleeve Fleece Crew Shirt - Men's

$39.99

~~$55.00~~

Our Ecolator® Crew is made from 95% recycled Polyester and features high loft grid channels that create an ideal microclimate which efficiently traps air and effectively allows circulation. A great...

20% Off

$39.99

~~$50.00~~

The Men's Terramar Thermolator Half Zip is a great base layer when the weather turns cold but you need to be out working or playing. Designed using Terramar's Climasense fabric (86% Recycled Polyes...

Smartwool Men's Intraknit Thermal Merino Base Layer Crew

$130.00

This minimalist-style crew is anything but insignificant. Our Men's Intraknit™ Thermal Merino Base Layer Crew is a lightweight, super-moveable top, made for all of your most extreme cold-weather ac...

27% Off

Coldpruf Platinum II Midweight Underwear Crew Shirt - Men's Tall

$32.99

~~$45.00~~

Your TRUSTED base layer REBUILT for the MODERN ADVENTURE. Inside Layer: 100% ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness Outside Layer: 70% polyester / 30% MERINO WOOL...

Coldpruf Expedition Single Layer Fleece Crew - Men's

$26.99

~~$0.00~~

A good base layer is always important; ColdPruf® Men’s Expedition Long Sleeve Crew is ideal for keeping warm in extreme cold. The material is a heavyweight Polyester Fleece meant to keep as much...

Coldpruf Journey Single Layer Fleece Crew - Men's

$21.99

~~$0.00~~

Single layer, lightweight fleece 100% ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness Fabric weight: 5 OZ. Rib Cuffs Drop Tail for added protection against cold Regular Fit

Coldpruf Journey Single Layer Fleece Crew - Women's

$19.99

~~$0.00~~

Regular fit crew Single layer, lightweight fleece Rib cuffs Drop tail for added protection against cold Technology: 100% ColdPruf® technical fiber polyester with SILVADUR™ intelligent freshne...

25% Off

Coldpruf Platinum Mid Weight Crew Shirt - Women's

$29.99

~~$40.00~~

Coldpruf Women's Platinum Crew Thermal Shirt is specifically engineered to trap air between its layers of fabric to provide a natural warmth shield. Product Features:Long sleeve, Crew neck, Flat se...

33% Off

Terramar 2.0 Cloud Nine CS Midweight Long Sleeve Scoopneck Shirt - Women's

$29.99

~~$45.00~~

With unsurpassed comfort, the Terramar Women's 2.0 Cloud Nine Scoop is the ultimate midweight base layer. With relaxed fitting spandex construction, coupled with soft, brushed polyester, this will ...

21% Off

Patagonia Women's Capilene Midweight Zip Neck

$69.99

~~$89.00~~

A classic, all-around 100% recycled polyester baselayer. The smooth, soft face makes for easy layering. Hollow-core yarns and a diamond-grid back trap warm air, wick moisture and dry fast. HeiQ® Pu...

29% Off

$49.99

~~$70.00~~

The secret of our Thermawool® is blending merino wool with just the right number of microfibers to make the ideal technical thermal fabric to breathe and manage moisture. Thermawool® has the benefi...

25% Off

$55.99

~~$75.00~~

Terramar's Thermawool CS 3.0 half zip for Women represent Terramar’s highest thermal rating and are the optimal choice for regulating temperature. This half zip top is constructed with a blend of M...

27% Off

Terramar Below Zero Crew 3.0 Shirt - Women's

$39.99

~~$55.00~~

The Below Zero Crew is the perfect piece to keep you warm. The extra durable four way stretch provides support and ease of movement in all directions as you move. The smooth face of the fabric is...

Smartwool Women's Classic Thermal Merino Base Layer 1/4 Zip

$120.00

We've updated the fit of our Women's Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of our heaviest base layer tops and one of our best b...

53% Off

Terramar Cloud Nine Scoopneck Print Shirt - Women's

from $21.00

~~$45.00~~

The Cloud Nine Scoop Neck Top is the ideal piece for all day warmth and comfort while being out in the elements. This versatile piece features an ultra-soft, midweight fabric utilizing our featur...

21% Off

Woman wearing a black long-sleeve top and pants on a white background

Person wearing a black long-sleeve athletic top on a white background

$69.99

~~$89.00~~

A classic, all-around polyester baselayer made with 50-100% recycled content. The smooth, soft face makes for easy layering. Hollow-core yarns and a diamond-grid back trap warm air, wick moisture a...

27% Off

Woman wearing a black long-sleeve shirt on a white background

$39.99

~~$55.00~~

The Below Zero Crew is the perfect piece to keep you warm. The extra durable four way stretch provides support and ease of movement in all directions as you move. The smooth face of the fabric is g...

30% Off

$38.50

~~$55.00~~

We all hate it. That stiff, distracted feeling you get when you're out in the cold. That's why, we built a baselayer that keeps you warm and dry without being bulky or riding up, so you can stay fo...

30% Off

$42.00

~~$60.00~~

Meet the all-new UA Base™—delivering the same trusted warmth without the bulk—now softer and smoother than ever for unmatched comfort on every adventure. UA Base™ 2.0 Active Baselayer is lightweig...

30% Off

$42.00

~~$60.00~~

Meet the all-new UA Base™—delivering the same trusted warmth without the bulk—now softer and smoother than ever for unmatched comfort on every adventure. UA Base™ 2.0 Active Baselayer is lightweig...

Woman wearing a blue and floral long-sleeve top on a white background

Woman wearing a patterned long-sleeve top and leggings on a white background

$130.00

Meet the Women's Classic Thermal Merino Base Layer Colorblock Crew. This 100% Merino wool fan-favorite combines the moisture management, temperature regulation, and odor resistance of Merino with t...

Woman wearing a black long-sleeve athletic shirt on a white background

Person wearing a black full-body suit on a white background

$90.00

An all-season favorite, the Women's Classic All-Season Merino Base Layer Long Sleeve can be sported as a base layer in the fall or summer when it's time to go backpacking. This base layer features ...

25% Off

Coldpruf Quest Performance Women's Crew Shirt

$29.99

~~$40.00~~

The Holy Grail of base layers. Single-layer, jersey knit fabric Fabric Weight: 6.5 oz Fiber Content: 85% ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness / 15% Spandex...

Smartwool Kids' Classic Thermal Merino Base Layer Crew

$65.00

Our Kids' Classic Thermal Merino Base Layer Crew is made of 100% responsibly sourced Merino wool to help your little ones stay comfortable on snow days and activities in the mountains. With a flatl...

$43.00

~~$0.00~~

Our Men's Active Stretch Crewneck delivers reliable thermal performance with a comfortable, flexible fit. Designed to wick moisture and retain warmth, this top keeps you dry and cozy during intense...

$43.00

~~$0.00~~

The Women's Active Stretch Crewneck is a versatile long-sleeve base layer designed to keep you comfortable and dry during any activity. Its moisture-wicking fabric moves with you, providing a snug ...

25% Off

Coldpruf Polypropylene Underwear Crewneck Shirt - Kid's

$14.99

~~$20.00~~

Sizes: XS(4-5), S(6-8), M(10-12), L(14-16), XL(18-20).The Enthusiast underwear program by Coldpruf features single-layer 100% polypropylene construction. It is designed to give a close comfortable ...

Coldpruf Quest Performance Youth Crew Shirt

$25.00

The Holy Grail of base layers. Single-layer, jersey knit fabric Fabric Weight: 6.5 oz Fiber Content: 85% ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness / 15% Spandex...

Base Layer

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