Base Layers and Underwear

Showing 1-50 of 1290 items

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Tops (604)
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Patagonia (83)
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Patagonia Capilene 2 Lightweight Zip-Neck

Base Layer Top

 
based on 3 reviews

$26 - $55
where to buy

Icebreaker Bodyfit 260 Olympia Zip

Base Layer Top

 
based on 2 reviews

$70
where to buy

Arc'teryx Rho LT Zip

Base Layer Top

 
based on 2 reviews

$70 - $118
where to buy

Marmot Lightweight Crew LS

Base Layer Top

 
based on 2 reviews

$26 - $38
where to buy

Marmot Midweight Bottom

Base Layer Bottom

 
based on 2 reviews

$25 - $50
where to buy

Patagonia Merino 2 Lightweight Crew

Base Layer Top

 
based on 2 reviews

$45 - $75
where to buy

Patagonia Capilene 4 Expedition Weight Zip-Neck

Base Layer Top

 
based on 2 reviews

$40 - $99
where to buy

Patagonia R1 Pants

Base Layer Bottom

 
based on 2 reviews

$59 - $99
where to buy

Under Armour ColdGear Fitted Legging

Base Layer Bottom

 
based on 2 reviews

$50
where to buy

SmartWool Microweight Tee

Base Layer Top

 
based on 3 reviews

$42 - $70
where to buy

Stoic Merino Bliss Shirt - Long-Sleeve

Base Layer Top

 
based on 2 reviews

$38 - $51
where to buy

Icebreaker 260 Midweight Tech Top

Base Layer Top

 
based on 1 review

$33 - $110
where to buy

Stoic Merino 200 1-Z Suit

One-Piece Base Layer

 
based on 1 review

$89 - $96
where to buy

Icebreaker Bodyfit 260 Slalom Zip

Base Layer Top

 
based on 1 review

$60 - $78
where to buy

Patagonia Capilene 2 Lightweight Crew

Base Layer Top

 
based on 1 review

$23 - $45
where to buy

Ibex Balance Briefs

Base Layer Bottom

 
based on 1 review

$22 - $29
where to buy

Mountain Hardwear Power Stretch Zip T

Base Layer Top

 
based on 1 review

$39 - $94
where to buy

Icebreaker GT 260 Rapid Legging

Base Layer Bottom

 
based on 1 review

$63
where to buy

Polarmax Tech Silk Crew

Base Layer Top

 
based on 1 review

$15 - $29
where to buy

REI Midweight Polartec Power Dry Zip-T

Base Layer Top

 
based on 1 review

$31
where to buy

Patagonia Capilene 1 Silkweight Scoop

Base Layer Top

 
based on 1 review

$21 - $45
where to buy

SmartWool Midweight Bottom

Base Layer Bottom

 
based on 1 review

$38 - $95
where to buy

Helly Hansen Fly Pant

Base Layer Bottom

 
based on 1 review

$29
where to buy

Icebreaker Siren Bra

Sports Bra

 
based on 1 review

$36 - $44
where to buy

Terramar Hot Totties Grid Fleece Tights

Base Layer Bottom

 
based on 1 review

$30 - $41
where to buy

ExOfficio Give-N-Go Boxer Brief

Boxers, Briefs, Bikini

 
based on 1 review

$17 - $29
where to buy

SmartWool Midweight Zip T

Base Layer Top

 
based on 1 review

$35 - $105
where to buy

Marmot Lightweight Bottom

Base Layer Bottom

 
based on 1 review

$23 - $74
where to buy

SmartWool Midweight Hoody

Base Layer Top

 
based on 1 review

$70 - $124
where to buy

Stoic Alpine Merino 150 Crew - Long-Sleeve

Base Layer Top

 
based on 1 review

$32 - $89
where to buy

Marmot Midweight Crew LS

Base Layer Top

 
based on 1 review

$27 - $55
where to buy

Patagonia Capilene 3 Midweight Bottoms

Base Layer Bottom

 
based on 1 review

$7 - $49
where to buy

SmartWool Lightweight Zip T

Base Layer Top

 
based on 4 reviews

$38 - $95
where to buy

Icebreaker 260 Midweight LS Crewe

Base Layer Top

 
based on 3 reviews

$27 - $90
where to buy

Eddie Bauer First Ascent Midweight Crewneck Baselayer

Base Layer Top

 
based on 1 review

$45
where to buy

Eddie Bauer First Ascent Midweight Baselayer Pants

Base Layer Bottom

 
based on 1 review

$45 - $49
where to buy

Icebreaker 150 Ultralite LS Atlas

Base Layer Top

 
based on 1 review

$35 - $69
where to buy

SmartWool Microweight Bottom

Base Layer Bottom

 
based on 1 review

$35 - $75
where to buy

Patagonia Capilene 2 Lightweight T-Shirt

Base Layer Top

 
based on 1 review

$23 - $39
where to buy

SmartWool Microweight Crew

Base Layer Top

 
based on 1 review

$41 - $75
where to buy

Icebreaker Anatomica Brief

Boxers, Briefs, Bikini

 
based on 1 review

$28 - $34
where to buy

SmartWool Midweight Funnel Zip

Base Layer Top

 
based on 1 review

$75 - $115
where to buy

Patagonia Merino 3 Midweight Crew

Base Layer Top

 
based on 1 review

$49 - $90
where to buy

Icebreaker GT 200 L/S Chase Zip

Base Layer Top

 
based on 1 review

$69 - $82
where to buy

Marmot Midweight Zip LS

Base Layer Top

 
based on 2 reviews

$32 - $55
where to buy

Terramar Thermolator II Pant

Base Layer Bottom

 
based on 1 review

$25
where to buy

Isis Henna Day

Sports Bra

 
based on 1 review

$23 - $27
where to buy

Stoic Breathe Composite Bottom

Base Layer Bottom

 
based on 1 review

$32
where to buy

ExOfficio Give-N-Go Lacy Full Cut Brief

Boxers, Briefs, Bikini

 
based on 1 review

$11 - $21
where to buy

Ibex Zepher Zip T-Neck

Base Layer Top

 
based on 1 review

$69 - $81
where to buy