Base Layer & Thermal Underwear

33% Off

Terramar 2.0 Thermolator II CS Midweight Pants - Men's

$29.99

~~$45.00~~

A midweight, extremely comfortable, brushed polyester spandex pant with four-way stretch for unrestricted movement, and Climasense thermoregulation comfort. The Terramar Men's 2.0 Thermolator II CS...

33% Off

Terramar ThermaSilk CS Silk Lightweight Pants - Men's

$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...

34% Off

Terramar EC2 Military Fleece Expedition Weight Pants - Men's

$22.99

~~$35.00~~

The Terramar Men's Military Fleece Expedition Weight Pants, with ec2® Qwik-Dri Thermoregulation Comfort Technology, are an ideal base layer choice for those blustery cold days of winter when the t...

27% Off

Terramar Ecolator CS 3.0 Fly Front Fleece Pants - Men's

$39.99

~~$55.00~~

The Terramar Men's Ecolator CS 3.0 Fly Front Fleece Pants are made from heavyweight grid fleece and are perfect as a temperature regulation layer. Featuring Climasense fabric treatment for a bette...

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...

12% Off

$21.99

~~$25.00~~

The Terramar Men's Transport Pant are the light weight high energy base layer you want when you want to cut the shill and keep the sea down. These Transport pants are made with Terramars Transport ...

37% Off

Terramar Transport +1.0 Lightweight Pant - Women's

$21.99

~~$35.00~~

The Terramar Women’s Transport® +1.0 Pants excel as a breathable, lightweight layering piece with optimal moisture and temperature management so you feel comfortable wherever you may roam. A wide w...

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...

30% Off

Terramar EC2 Military Fleece Expedition Weight Tall Pants - Men's

$27.99

~~$40.00~~

The Terramar Men's Military Fleece Expedition Weight Tall Pants, with ec2® Qwik-Dri Thermoregulation Comfort Technology, are an ideal baselayer choice for those blustery cold days of winter when t...

25% Off

Terramar 2.0 Men's Thermolator Performance 3/4 Pant

$29.99

~~$40.00~~

The Thermolator® 3/4 Pant is the ideal piece for all day warmth and comfort while being out in the elements. This versatile piece features an ultra-soft, mid-weight fabric utilizing our features Cl...

33% Off

Terramar Genesis Fleece Pant - Toddler's

$19.99

~~$30.00~~

Terramar Toddler Genesis Fleece Pant is great when your little one wants be out in real cold weather. A expedition Wt. 4.0 base layer made from Terramar's Climasense polyester fabric which mana...

Coldpruf Expedition Single Layer Fleece Pant - Men's

$26.99

~~$0.00~~

Single Layer Engineering 100% Polyester Fleece – Heavyweight 10 oz. Comfort Waistband Rib Cuffs for added protection against cold Tagless and Flat seams for added comfort Full Cut True Fit

Coldpruf Journey Single Layer Fleece Pant - Men's

$21.99

~~$0.00~~

Single layer, lightweight fleece 100% ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness Fabric weight: 5 oz. Rib Cuffs Comfort Waistband Front and Back Rise Regular Fit

Smartwool Kids' Classic Thermal Merino Base Layer Bottom

$65.00

Our Kids' Classic Thermal Merino Base Layer Bottom uses our super soft Mid 250 interlock knit—perfect for layering in cool conditions and great for wearing alone on a mild day. Now your kids can be...

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 ...

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...

33% Off

Person wearing black leggings on a white background

Terramar 2.0 Cloud Nine CS Midweight Pants - Women's

$29.99

~~$45.00~~

With unsurpassed comfort, the Terramar Women's 2.0 Cloud Nine Pants are the ultimate midweight base layer. With relaxed fitting spandex construction, coupled with soft, brushed polyester, these wil...

Patagonia Women's Capilene Midweight Bottoms

$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® P...

25% Off

$14.99

~~$20.00~~

Our Terramar Everyday Essentials Leggings are a great combination of comfort and warmth. Seamlessly made, these leggings are brushed on the inside and are a heavier weight making them perfect for ...

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...

Patagonia Men's Capilene Midweight Bottoms

$79.00

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...

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

$39.99

~~$55.00~~

The Below Zero Performance Tight is the perfect piece to keep you warm. The extra durable four way stretch provides support and ease of movement in all directions. The smooth face of the fabric is ...

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...

Under Armour UA Base™ 2.0 Women's Leggings

$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...

Under Armour UA Base™ 2.0 Men's Leggings

$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...

25% Off

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

$60.00

~~$80.00~~

An alpine-inspired tight that can be worn as a single or base layer From high alpine trails to the climbing gym, the Butter™ Tight is a versatile, buttery soft base layer that pairs perfectly under...

25% Off

Mountain Hardwear Men's Butter Up™ Slim Pant

$74.25

~~$99.00~~

An alpine-inspired active slim pant that can be worn alone or as a base layer From high alpine trails to the climbing gym, the Butter™ Slim Pant is a versatile, buttery soft base layer that pairs p...

33% Off

Three children wearing black wetsuits 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...

$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...

Base Layer

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