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Base Layer

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Black long-sleeve athletic shirt on a white background
$37.99
$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...
Black long-sleeve shirt on a white background
$48.00
$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...
Black long-sleeve shirt on a white background
$48.00
$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 ...
Black long-sleeve shirt with blue accents on a white background
$49.00
$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
Black long-sleeve shirt on a white background
$25.99
$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
Black long-sleeve shirt on a white background
$25.99
$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
$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...
17% Off
Terramar Ecolator CS 3.0 Long Sleeve Fleece Half Zip - Men's Terramar Ecolator CS 3.0 Long Sleeve Fleece Half Zip - Men's
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+1
$49.99
$49.99
$60.00
The Terramar Men's Ecolator CS 3.0 Long Sleeve Fleece 1/4 Zip is made from heavyweight grid fleece and is perfect as a temperature regulation layer. Featuring Climasense fabric treatment for a bet...
Voormi 1/4 Zip Mock Neck Voormi 1/4 Zip Mock Neck
+2
+1
$129.00
$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...
Men's Expedition 1/4 Zip Top Men's Expedition 1/4 Zip Top
+4
+3
+2
+1
$179.00
$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
$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
Person wearing a black long-sleeve athletic shirt and leggings on a white background
$19.99
$19.99
$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...
33% Off
Three children wearing black wetsuits on a white background Child wearing a black long-sleeve shirt on a white background
$19.99
$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
+3
+2
+1
from $75.99
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...
50% 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
+2
+1
$30.00
$30.00
$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 ...

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