Base Layer & Thermal Underwear

Coldpruf Basic Midweight Underwear Crew Shirt - Men's

$15.99

The Coldpruf Men's Basic Midweight Crew Shirt is a base layer underwear garment, designed to trap air between its two layers, providing a natural barrier of warmth. The two-layer engineering delive...

Coldpruf Basic Midweight Underwear Pants - Men's

$15.99

The Coldpruf Men's Basic Midweight Underwear Pants are a base layer underwear garment, designed to trap air between its two layers, providing a natural barrier of warmth. The two-layer engineering ...

17% Off

Terramar EC2 Expedition Weight Military Fleece Union Suit - Men's

$49.99

~~$60.00~~

The Terramar Men's Military Fleece Expedition Weight Union Suit, with ec2 Qwik-Dri Thermoregulation Comfort Technology, is an ideal baselayer choice for those blustery cold days of winter, when the...

33% Off

Coldpruf Basic Midweight Underwear Tall Pants - Men's

$19.99

~~$30.00~~

The Coldpruf Men's Tall Basic Midweight Underwear Pants are a base layer underwear garment, designed to trap air between its two layers, providing a natural barrier of warmth. The two-layer enginee...

23% Off

Coldpruf Enthusiast Polypropylene Lightweight Tall Pants - Men's

$22.99

~~$30.00~~

The Coldpruf Men's Enthusiast Polypropylene Lightweight Tall Pants are a single-layer garment made out of 100% polypropylene, engineered to give a close comfortable fit without being restrictive. T...

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...

25% Off

Coldpruf Platinum II Midweight Underwear Pants - Men's

$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 Bottom - Men's

$115.00

We've updated our Men's Merino 250 Base Layer Bottom to bring you a better fitting, more functional tight. The technical benefits of 100% Merino wool will help you keep your game at a high level fo...

Coldpruf Extreme Performance Underwear Pants - Men's

$50.00

The Coldpruf Men's Extreme Performance Expedition Weight Pants have been specifically engineered with Coldpruf Technology (CTF) for warmth, dryness, and odor control, with spandex for superior fit....

23% Off

Terramar ThermaSilk CS Silk Lightweight Tall Pants - 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...

Smartwool Men's Classic All-Season Merino Base Layer Bottom

$90.00

A year-round favorite, our Classic All-Season Merino Base Layer Bottom works hard to keep you comfortable everywhere, from the ski lifts to the campsite. With an updated fit to improve functionalit...

SmartWool Merino 250 Baselayer 1/4 Zip - Men's

$120.00

We've updated the fit of our Men's Merino 250 Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of our heaviest base layer tops and best base layers for cold weath...

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...

Coldpruf Basic Midweight Underwear Crew Shirt - Women's

$15.99

The Coldpruf Women's Basic Midweight Crew Shirt is a base layer underwear garment, designed to trap air between its two layers, providing a natural barrier of warmth. The two-layer engineering deli...

20% Off

Coldpruf Enthusiast Polypropylene Lightweight Crew Shirt - Women's

$19.99

~~$25.00~~

The Coldpruf Women's Enthusiast Polypropylene Lightweight Crew Shirt is a single-layer garment made out of 100% polypropylene, engineered to give a close comfortable fit without being restrictive. ...

20% Off

Coldpruf Enthusiast Polypropylene Lightweight Pants - Women's

$19.99

~~$25.00~~

The Coldpruf Women's Enthusiast Polypropylene Lightweight Pant are a single-layer garment made out of 100% polypropylene, engineered to give a close comfortable fit without being restrictive. The e...

Coldpruf Extreme Performance Expedition Weight Underwear Crew Shirt - Women's

$50.00

The Coldpruf Women's Extreme Performance Expedition Weight Crew Shirt has been specifically engineered with Coldpruf Technology (CTF) for warmth, dryness, and odor control, with spandex for superio...

25% Off

Coldpruf Platinum Mid Weight Pants - Women's

$29.99

~~$40.00~~

The Platinum two layer garment has been specifically engineered with our ColdPruf technology to trap air between the layers of fabric to provide a natural warmth shield. The Platinum offers the des...

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 ...

17% Off

Coldpruf Enthusiast Polypropylene Lightweight Tall Crew Shirt - Men's

$24.99

~~$30.00~~

The Coldpruf Men's Enthusiast Polypropylene Lightweight Tall Crew Shirt is a single-layer garment made out of 100% polypropylene, engineered to give a close comfortable fit without being restrictiv...

27% Off

Terramar Men's Ecolator 3.0 Ecolator Pant

$39.99

~~$55.00~~

Called a "Killer Value" in the Winter Outside Magazine Buyer's Guide, warmth and layering performance is what the Terramar Ecolator is all about. The high loft grid channels create an ideal microcl...

27% Off

Coldpruf Platinum II Midweight Underwear Pants - 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...

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 ...

$43.00

~~$0.00~~

Our Men's Active Stretch Bottom offers superior moisture-wicking performance combined with thermal warmth to keep you comfortable during any activity. Its flexible, stretch fabric moves with you, p...

Black long-sleeve athletic shirt on a white background

$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...

17% Off

Terramar Ecolator CS 3.0 Long Sleeve Fleece Half Zip - Men's

$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...

Base Layer

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