Base Layer & Thermal Underwear

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 ...

$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 ...

Person wearing black leggings on a white background

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

from $115.00

100% Merino. 100% capable. Our Women's Merino Base Layer Bottom is always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a ran...

Coldpruf Journey Single Layer Fleece Pant - Women's

$19.99

~~$0.00~~

Regular fit pants Comfort waistband Front and back rise Single layer, lightweight fleece Rib cuffs Technology: 100% ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness ...

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~~

Made with a special two-layer soft jersey knit, this Polarmax Double Layer thermal is sure to keep you warm when you need it most. The unique double layer construction of this women's crew neck bas...

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...

23% Off

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

$49.99

~~$65.00~~

The Miracle of SilkAfter 4000 years, nature and science have joined forces to produce silk long underwear which can help thermo-regulate the body's temperature and dramatically speed up the dispers...

$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...

$179.00

The Men's Expedition 1/4-Zip Top is the new benchmark for base layers. This top redefines warmth and breathability with our innovative DUAL SURFACE™ Precision Blended Wool. This lofted material cr...

50% Off

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

$19.99

~~$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...

50% Off

$19.99

~~$39.95~~

This form-fitting, lightweight pant 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 ...

50% Off

$19.99

~~$39.95~~

This form-fitting, super soft baselayer pant 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. Acti...

33% Off

Three children wearing black wetsuits on a white background

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

$19.99

~~$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...

23% Off

Man wearing a gray long-sleeve athletic shirt on a white background

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

from $75.99

~~$99.00~~

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® P...

Base Layer

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