Base Layer & Thermal Underwear

40% Off

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

$39.00

~~$65.00~~

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...

40% Off

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

$42.00

~~$70.00~~

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...

40% Off

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

$36.00

~~$60.00~~

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 ...

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...

40% Off

Mountain Hardwear Men's Butter Up™ Long Sleeve Shirt

$36.00

~~$60.00~~

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 ...

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...

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...

Black long-sleeve athletic shirt on a white background

$37.99

~~$0.00~~

Performance that moves with you. The ColdPruf® Style 49A Performance Crew is built for cold to very cold weather and medium- to high-activity levels. Its athletic, close-to-body fit makes it an exc...

$37.99

Performance that moves with you. Designed for cold to very cold conditions and medium- to high-activity levels, the ColdPruf® Style 89A Performance Crew is a versatile base layer that can also be w...

5% Off

Black compression pants on a white background

$37.99

~~$40.00~~

Performance that moves with you. Designed for cold to very cold conditions and medium- to high-activity levels, the ColdPruf® Style 89B Performance Pants deliver essential warmth, comfort, and flex...

$37.99

~~$0.00~~

Performance that moves with you. The ColdPruf® Style 49B Performance Pants are designed for cold to very cold weather and medium- to high-activity levels. With a close athletic fit, they sit just b...

Black long-sleeve shirt on a white background

$48.00

~~$0.00~~

Billowy warmth without added weight, Micro Fleece under layers are durable and breathable. When it's really chilly outside, let our Micro Fleece keep you warm so you can focus on fun! Our Micro Fle...

$48.00

~~$48.00~~

Extremely soft warmth without weight, our Micro Fleece base layer shirt is durable and breathable. When it's really cold outside, this microfiber polyester crew is an excellent choice for layering ...

$48.00

~~$0.00~~

Microfiber polyester yarns make the fabric of these fleece thermal pants so soft to the touch! Billowy warmth without weight, Micro Fleece base layers are durable and breathable. When it's cold, th...

$49.00

~~$0.00~~

Originals thermal tights are a long time kids' favorite with a soft cotton-like hand feel that does not hold moisture. Made with MTF Moisture Transfer Fibers, these children's winter tights move...

Black long-sleeve shirt with blue accents on a white background

$49.00

~~$0.00~~

If you're looking for classic children's thermal, look no further than Hot Chillys Originals. Improving on the qualities that made the first generation so popular, this updated thermal underwear ...

24% Off

$25.99

~~$34.00~~

jersey knit that locks in warmth by trapping air between the layers. These midweight base layer pants utilize Acclimate Dry hydrophobic yarns to effectively wick moisture away, keeping you dry and ...

24% Off

$25.99

~~$34.00~~

Experience ultimate warmth with our men's thermal top, featuring a two-layer soft jersey knit and a unique double layer construction for superior thermal retention. The special Acclimate Dry hydrop...

24% Off

Navy blue leggings on a white background

$25.99

~~$34.00~~

Experience exceptional warmth and comfort with our Men's Double Layer Bottoms. Featuring a unique two-layer soft jersey knit construction, these bottoms offer superior thermal insulation by trappin...

Base Layer

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