Base Layer & Thermal Underwear

79% Off

Terramar Ultra Merino 2.0 Scoop Neck Shirt - Women's

$14.99

~~$70.00~~

This mid-weight, duo layer crew, consists of a fully synthetic inside and Merino blend face. Our bi-layer construction, creates an air pocket in-between both layers for additional insulation and ...

50% Off

Terramar Below Zero 1/2 Zip 3.0 Shirt - Women's

$29.99

~~$60.00~~

The Below Zero Half-Zip Top 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 f...

80% Off

Terramar Ultra Merino 1/2 Zip Shirt 2.0 - Women's

$14.99

~~$75.00~~

This mid-weight, duo layer crew, consists of a fully synthetic inside and Merino blend face. Our bi-layer construction, creates an air pocket in-between both layers for additional insulation and ...

Patagonia Women's Capilene Midweight Zip Neck

$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...

38% Off

Terramar Cloud Nine Turtle Neck - Women's

$29.99

~~$48.00~~

The Cloud Nine Turtle 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 Clima...

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...

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...

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...

30% Off

Terramar Women's Heritage Fleece Crew Shirt

$34.99

~~$50.00~~

Elevate your everyday wear with the Terramar Women's Heritage Fleece Crew Shirt. Designed to blend comfort and style seamlessly, this shirt is the perfect addition to your wardrobe, whether you're ...

$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...

25% Off

Smartwool Women's Intraknit Thermal Merino Base Layer Crew

from $97.50

~~$130.00~~

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

38% Off

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

$24.95

~~$39.95~~

This form-fitting, lightweight top for men will help keep you warm and dry. Its wicking properties take moisture away from your body while the poly blend fibers help keep you warm. Active stretch a...

38% Off

Person wearing a black long-sleeve athletic shirt and leggings on a white background

$24.95

~~$39.95~~

This form-fitting, super soft baselayer top for women will help keep you warm and dry. Its wicking properties take moisture away from your body while the poly blend fibers help keep you warm. Activ...

27% Off

Three children wearing black wetsuits on a white background

$21.99

~~$30.00~~

This form-fitting, lightweight base layer will help keep you warm and dry. Its wicking properties take moisture away from your body while the poly blend fibers help keep you warm. Active stretch an...

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

$89.00

~~$0.00~~

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...

33% Off

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

Woman wearing a blue long-sleeve top and leggings on a light gray background

$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...

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...

38% Off

$29.99

~~$48.00~~

This Terramar Cloud Nine 2.0 Baselayer Turtle Neck is designed to keep you warm and comfortable during outdoor activities. Made with soft, lightweight fabric and featuring a turtle neck, it is perf...

53% Off

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

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

$21.00

~~$45.00~~

Women's 2.0 Cloud Nine Crew Lightweight Top A light base for your winter cardio pursuits Ultra-soft brushed surface traps in heat and is breathable 4-way stretch fabric doesn’t restrict movement A...

$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...

$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...

$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 black long-sleeve top with a zipper on a light pink background

$140.00

~~$0.00~~

Warm, versatile Polartec® Power Stretch® Pro base layer for cold conditions. The Kyanite Baselayer Zip Neck was previously the Rho Heavyweight Zip Neck. The Kyanite Baselayers are made for cold day...

Person wearing a black long-sleeve top and blue pants with a beige cap on a light gray background

Person wearing a black hoodie and gray pants on a light gray background

$65.00

~~$0.00~~

The super soft UPF 50 hoody for adventures big and small Perfect for giving it your all on the next pitch or pacing on your favorite trail, the Butter™ Long Sleeve Hoody is big on performance witho...

Person wearing a black long-sleeve top and red beanie on a light gray background

Woman wearing a light purple long-sleeve athletic top on a white background

$70.00

~~$0.00~~

The super soft, half-zip that’s at home in the high alpine and casual days at lower elevations This perfect moisture-wicking base layer is buttery soft, allowing you to move effortlessly through an...

Person wearing a black long-sleeve top and maroon puffer pants with a purple beanie on a light gray background

Person wearing a purple long-sleeve shirt and green pants on a light gray background

$60.00

~~$0.00~~

Crucial UPF 50 sun protection that’s moisture wicking and anti-odor for running solo or layering. Make every high effort outing smooth as butter with a long-sleeve layer that’s worth its weight in ...

$129.00

Now available in our Phase.SC™ concealment patterns, Blowdown and Harvest, the 1/4 Zip Mock Neck is the feather-light companion for folks on the move. Revel in comfort and style with this adaptable...