Men's Base Layer Tops - Activewear
gym, fitness, workout, sports clothing

Clothes you can move freely and feel comfortable in while pushing your physical limits.


Columbia Baselayer Midweight Top - Men
Columbia Baselayer Midweight Top - Men's
On sale - now $29.22 - was $44.95

Helly Hansen Dry Stripe Crew Top - Men
Helly Hansen Dry Stripe Crew Top - Men's
On sale - now $29.96 - was $39.95

Louis Garneau 2002 Mock Neck Top - Men
Louis Garneau 2002 Mock Neck Top - Men's
On sale - now $29.97 - was $49.95

Under Armour Coldgear Infrared Evo Crew - Men
Under Armour Coldgear Infrared Evo Crew - Men's
On sale - now $30.24 - was $54.99

Burton Lightweight Crew - Men
Burton Lightweight Crew - Men's
On sale - now $31.46 - was $44.95

Marmot Harrier Crew Top - Men
Marmot Harrier Crew Top - Men's
On sale - now $32.47 - was $49.95

DAKINE Grant Crew Top - Men
DAKINE Grant Crew Top - Men's
On sale - now $33.71 - was $44.95

Patagonia Capilene Lightweight Crew Shirt - Men
Patagonia Capilene Lightweight Crew Shirt - Men's
On sale - now $34.3 - was $49

Burton Midweight Crew - Men
Burton Midweight Crew - Men's
On sale - now $34.96 - was $49.95

Under Armour Coldgear Infrared Evo CG Mock Top - Men
Under Armour Coldgear Infrared Evo CG Mock Top - Men's
On sale - now $35.74 - was $54.99

Saga Tek Crewneck Shirt - Men
Saga Tek Crewneck Shirt - Men's
On sale - now $35.96 - was $44.95

Under Armour ColdGear Infrared Scent Control Tevo Crew Top - Men
Under Armour ColdGear Infrared Scent Control Tevo Crew Top - Men's
On sale - now $37.49 - was $74.99

Marmot Kestrel 1/2-Zip Top - Men
Marmot Kestrel 1/2-Zip Top - Men's
On sale - now $38.46 - was $54.95

Burton Midweight Long Neck Top - Men
Burton Midweight Long Neck Top - Men's
On sale - now $38.46 - was $54.95

Saga Tek Pullover Hoodie - Men
Saga Tek Pullover Hoodie - Men's
On sale - now $38.46 - was $54.95

Under Armour Base 2.0 1/4-Zip Top - Men
Under Armour Base 2.0 1/4-Zip Top - Men's
On sale - now $38.99 - was $59.99

Under Armour Base 3.0 Crew - Men
Under Armour Base 3.0 Crew - Men's
On sale - now $41.24 - was $74.99

Patagonia Capilene Midweight Crew Top - Men
Patagonia Capilene Midweight Crew Top - Men's
On sale - now $41.3 - was $59

Helly Hansen Dry Performance 1/2-Zip Top - Men
Helly Hansen Dry Performance 1/2-Zip Top - Men's
On sale - now $41.96 - was $59.95

Icebreaker BodyFit 150-Ultralight Anatomica V-Neck Shirt - Men
Icebreaker BodyFit 150-Ultralight Anatomica V-Neck Shirt - Men's
On sale - now $42 - was $70

Under Armour Coldgear Infrared Evo CG 1/4 Zip Top - Men
Under Armour Coldgear Infrared Evo CG 1/4 Zip Top - Men's
On sale - now $42.24 - was $64.99

Arc
Arc'teryx Phase SL Crew Top - Long-Sleeve - Men's
On sale - now $44.85 - was $69

The North Face Light Crew Neck Top - Men
The North Face Light Crew Neck Top - Men's
$44.95

Helly Hansen Dry Charger 1/2-Zip Top - Men
Helly Hansen Dry Charger 1/2-Zip Top - Men's
On sale - now $44.96 - was $59.95

Marmot Harrier 1/2-Zip Top - Men
Marmot Harrier 1/2-Zip Top - Men's
On sale - now $44.96 - was $59.95

Under Armour Base 1.0 Crew - Men
Under Armour Base 1.0 Crew - Men's
$44.99

Under Armour ColdGear Infrared Scent Control Tevo Mock-Neck Top - Men
Under Armour ColdGear Infrared Scent Control Tevo Mock-Neck Top - Men's
On sale - now $44.99 - was $74.99

Under Armour Scent Control Nutech 1/4-Zip Top - Men
Under Armour Scent Control Nutech 1/4-Zip Top - Men's
On sale - now $44.99 - was $89.99

Minus 33 Explorer Crew Top - Men
Minus 33 Explorer Crew Top - Men's
On sale - now $45.59 - was $75.99

FlyLow Gear Clark Top - Men
FlyLow Gear Clark Top - Men's Coal/Military
On sale - now $46.72 - was $84.95

Nike Pro Hyperwarm Mock-Neck Shirt - Men
Nike Pro Hyperwarm Mock-Neck Shirt - Men's
On sale - now $47.96 - was $59.95

Ibex Woolies 1 Crew Top - Men
Ibex Woolies 1 Crew Top - Men's
On sale - now $48 - was $80

Patagonia Capilene Midweight Zip-Neck Top - Men
Patagonia Capilene Midweight Zip-Neck Top - Men's Legend Green
On sale - now $48.3 - was $69

Burton Active Crew - Men
Burton Active Crew - Men's
On sale - now $48.96 - was $69.95

Burton Roadie Tech Top - Men
Burton Roadie Tech Top - Men's
On sale - now $48.96 - was $69.95

Kavu Ridgway 1/2-Zip Top - Long-Sleeve - Men
Kavu Ridgway 1/2-Zip Top - Long-Sleeve - Men's
$49.95

The North Face Warm Crew Neck Top - Men
The North Face Warm Crew Neck Top - Men's
$49.95

Castelli 10m Lung Warmer Top - Men
Castelli 10m Lung Warmer Top - Men's
$49.95

Simms Waderwick Core Crewneck Shirt - Men
Simms Waderwick Core Crewneck Shirt - Men's
$49.95

Under Armour Base 4.0 Crew - Men
Under Armour Base 4.0 Crew - Men's
On sale - now $50.99 - was $84.99

Under Armour ColdGear Infrared Scent Control Tevo Zip-Neck Top - Men
Under Armour ColdGear Infrared Scent Control Tevo Zip-Neck Top - Men's
On sale - now $50.99 - was $84.99

Brixton Fargo Long Underwear Set - Men
Brixton Fargo Long Underwear Set - Men's
On sale - now $51.32 - was $78.95

Icebreaker Everyday Half-Zip Top - Men
Icebreaker Everyday Half-Zip Top - Men's
On sale - now $52 - was $80

Burton Expedition 1/4-Zip Top - Men
Burton Expedition 1/4-Zip Top - Men's
On sale - now $52.46 - was $74.95

Spyder Venom Crew - Men
Spyder Venom Crew - Men's
On sale - now $52.5 - was $75

Arc
Arc'teryx Phase AR Crew - Long-Sleeve - Men's
On sale - now $52.5 - was $75

Stoic Merino Lightweight 1/4 Zip Top - Men
Stoic Merino Lightweight 1/4 Zip Top - Men's
On sale - now $53.97 - was $89.95

Under Armour Base 2.0 Crew - Men
Under Armour Base 2.0 Crew - Men's Black/Steel
$54.99

Icebreaker Everyday Long Sleeve Crew - Men
Icebreaker Everyday Long Sleeve Crew - Men's
On sale - now $56 - was $70

Arc
Arc'teryx Phase SL Crew Top - Men's
On sale - now $56.25 - was $75

Rab Merino Plus 160 Long-Sleeve Crew - Men
Rab Merino Plus 160 Long-Sleeve Crew - Men's
On sale - now $58.47 - was $89.95

Arc
Arc'teryx Phase SL Crew Short-Sleeve Baselayer - Men's
On sale - now $58.65 - was $69

Patagonia Capilene Lightweight Zip-Neck Top - Men
Patagonia Capilene Lightweight Zip-Neck Top - Men's
$59

Simms Waderwick Thermal Top - Men
Simms Waderwick Thermal Top - Men's
$59.95

The North Face Warm Zip-Neck Top - Men
The North Face Warm Zip-Neck Top - Men's
$59.95

Helly Hansen Active Flow 1/2-Zip Top - Men
Helly Hansen Active Flow 1/2-Zip Top - Men's
$59.95

Outdoor Research Sequence Crew Top - Men
Outdoor Research Sequence Crew Top - Men's
$59.95

Bjorn Daehlie Compete Top - Men
Bjorn Daehlie Compete Top - Men's
$59.95

Minus 33 Ticonderoga Lightweight Crew Top - Men
Minus 33 Ticonderoga Lightweight Crew Top - Men's
$59.99

Icebreaker BodyFit 150-Ultralite Anatomica Tank Top - Men
Icebreaker BodyFit 150-Ultralite Anatomica Tank Top - Men's
$60

Icebreaker Everyday Crew Top - Men
Icebreaker Everyday Crew Top - Men's
$60

Marmot Neothermo 1/2-Zip Fleece Top - Men
Marmot Neothermo 1/2-Zip Fleece Top - Men's
On sale - now $60.47 - was $109.95

Icebreaker BodyFit 200 Oasis Hooded Top - Men
Icebreaker BodyFit 200 Oasis Hooded Top - Men's
On sale - now $60.5 - was $110

Helly Hansen Warm Ice Long-Sleeve Crew Top - Men
Helly Hansen Warm Ice Long-Sleeve Crew Top - Men's
On sale - now $62.96 - was $89.95

Outdoor Research Radiant LT Zip Top - Men
Outdoor Research Radiant LT Zip Top - Men's
On sale - now $63.71 - was $84.95

Nike Ultimate Dry Short-Sleeve Shirt - Men
Nike Ultimate Dry Short-Sleeve Shirt - Men's
On sale - now $63.96 - was $79.95

Columbia Arctic Trek Baselayer - Men
Columbia Arctic Trek Baselayer - Men's
On sale - now $64.32 - was $98.95

Mammut Trovat Pro Half-Zip Top - Men
Mammut Trovat Pro Half-Zip Top - Men's
On sale - now $64.32 - was $98.95

The North Face TKA 100 Microvelour Glacier 1/4-Zip Top - Men
The North Face TKA 100 Microvelour Glacier 1/4-Zip Top - Men's Cardinal Red
$64.95

Craft Warm CN Top - Men
Craft Warm CN Top - Men's
On sale - now $64.97 - was $99.95

Eider Tignes 1/2-Zip Top - Men
Eider Tignes 1/2-Zip Top - Men's
On sale - now $64.97 - was $129.95

Minus 33 Allagash Lightweight Zip-Neck Top - Men
Minus 33 Allagash Lightweight Zip-Neck Top - Men's Black
$64.99

Under Armour Base 2.0 Hooded Top - Men
Under Armour Base 2.0 Hooded Top - Men's
$64.99

Minus 33 Chocorua Midweight Crew Top - Men
Minus 33 Chocorua Midweight Crew Top - Men's
$65.95

Mons Royale 1961 Henley Top - Men
Mons Royale 1961 Henley Top - Men's
On sale - now $65.97 - was $119.95

Black Crows Corpus Baselayer Top - Men
Black Crows Corpus Baselayer Top - Men's
On sale - now $67.46 - was $89.95

Outdoor Research Sequence Zip-Neck Top - Men
Outdoor Research Sequence Zip-Neck Top - Men's Black
$68.95

Spyder Charger Therma Stretch Zip-Neck Top - Men
Spyder Charger Therma Stretch Zip-Neck Top - Men's
On sale - now $69.3 - was $99

Patagonia Capilene Thermal Weight Zip-Neck Top - Men
Patagonia Capilene Thermal Weight Zip-Neck Top - Men's
On sale - now $69.3 - was $99

Columbia Heavyweight II Half-Zip Top - Men
Columbia Heavyweight II Half-Zip Top - Men's
$69.95

SmartWool NTS Micro 150 T-Shirt - Men
SmartWool NTS Micro 150 T-Shirt - Men's
$69.95

Bjorn Daehlie Raw Seamless Top - Men
Bjorn Daehlie Raw Seamless Top - Men's
On sale - now $69.96 - was $99.95

Burton AK Power Grid Hooded Top - Men
Burton AK Power Grid Hooded Top - Men's
On sale - now $69.96 - was $99.95

Helly Hansen Warm Freeze 1/2-Zip Top - Men
Helly Hansen Warm Freeze 1/2-Zip Top - Men's
On sale - now $69.96 - was $99.95

Ibex Woolies 1 Top - Men
Ibex Woolies 1 Top - Men's
$70

Icebreaker BodyFit 150-Ultralite Anatomica Crew - Men
Icebreaker BodyFit 150-Ultralite Anatomica Crew - Men's
$70

Dynafit Thermal 1/2-Zip Shirt - Men
Dynafit Thermal 1/2-Zip Shirt - Men's
On sale - now $71.47 - was $129.95

ROJK Superwear PrimaLoft SuperBase Sweater - Men
ROJK Superwear PrimaLoft SuperBase Sweater - Men's
On sale - now $71.47 - was $109.95

Mons Royale Original Top - Men
Mons Royale Original Top - Men's
On sale - now $71.47 - was $109.95

Icebreaker Bodyfit 260 Midweight Tech Top Crewe - Men
Icebreaker Bodyfit 260 Midweight Tech Top Crewe - Men's
On sale - now $71.5 - was $110

Dynafit TLT 1/2-Zip Top - Men
Dynafit TLT 1/2-Zip Top - Men's
On sale - now $71.97 - was $119.95

Icebreaker BodyFit 200 Zone Zip-Neck Top - Men
Icebreaker BodyFit 200 Zone Zip-Neck Top - Men's
On sale - now $72 - was $120

Icebreaker Bodyfit 260 Midweight Tech Top 1/2-Zip Crew - Men
Icebreaker Bodyfit 260 Midweight Tech Top 1/2-Zip Crew - Men's
On sale - now $72 - was $120

Ibex OD Henley Shirt - Men
Ibex OD Henley Shirt - Men's
On sale - now $74.75 - was $115

Ibex Woolies 2 Zip-Neck Top - Men
Ibex Woolies 2 Zip-Neck Top - Men's
On sale - now $74.75 - was $115

Adidas Primeknit Parley T-Shirt - Men
Adidas Primeknit Parley T-Shirt - Men's
$74.95

Duckworth Maverick T-Shirt - Men
Duckworth Maverick T-Shirt - Men's
$74.95

SmartWool Merino 150 Baselayer - Men
SmartWool Merino 150 Baselayer - Men's
$74.95

SmartWool Merino 150 Pattern Baselayer - Men
SmartWool Merino 150 Pattern Baselayer - Men's
$74.95

SmartWool Micro 150 Crew - Long-Sleeve - Men
SmartWool Micro 150 Crew - Long-Sleeve - Men's Sea Pine
$74.95

SmartWool NTS Micro 150 Pattern T-Shirt - Men
SmartWool NTS Micro 150 Pattern T-Shirt - Men's
$74.95

Icebreaker Bodyfit 180 Lightweight Anatomica Rib Crewe Shirt - Short-Sleeve - Men
Icebreaker Bodyfit 180 Lightweight Anatomica Rib Crewe Shirt - Short-Sleeve - Men's
$75

Minus 33 Isolation Midweight Zip-Neck Top - Men
Minus 33 Isolation Midweight Zip-Neck Top - Men's
$75.95

Mons Royale Ninja Jersey Crew Top - Men
Mons Royale Ninja Jersey Crew Top - Men's
On sale - now $77.97 - was $119.95

Arc
Arc'teryx Phase AR Crew - Men's
$79

Columbia Diamond Peak 1/2-Zip Top - Men
Columbia Diamond Peak 1/2-Zip Top - Men's
$79.95

SmartWool Merino 150 Baselayer - Men
SmartWool Merino 150 Baselayer - Men's
$79.95

SmartWool Merino 150 Pattern Baselayer - Men
SmartWool Merino 150 Pattern Baselayer - Men's Taupe
$79.95

SmartWool Micro 150 Combo T-Shirt - Men
SmartWool Micro 150 Combo T-Shirt - Men's
$79.95

Rab Flux Pull-On Top - Men
Rab Flux Pull-On Top - Men's
$79.95

Airblaster Hoodless Ninja Suit - Men
Airblaster Hoodless Ninja Suit - Men's
On sale - now $82.46 - was $109.95

Mons Royale Temple Tech Hooded Zip Top - Men
Mons Royale Temple Tech Hooded Zip Top - Men's
On sale - now $84.47 - was $129.95

Arc
Arc'teryx Phase SL Zip Neck Top - Men's Vermillion
$85

Ibex Woolies 1 Stripe Crew Top - Men
Ibex Woolies 1 Stripe Crew Top - Men's
$85

Ibex Woolies 1 Zip-Neck Top - Men
Ibex Woolies 1 Zip-Neck Top - Men's
$85

Arc
Arc'teryx Phase AR Zip Neck Top - Men's Black
$89

Patagonia Capilene Thermal Weight Crew Top - Men
Patagonia Capilene Thermal Weight Crew Top - Men's Black
$89

Duckworth Comet Long-Sleeve Crew - Men
Duckworth Comet Long-Sleeve Crew - Men's
$89.95

Outdoor Research Radiant Hybrid Pullover Fleece Jacket - Men
Outdoor Research Radiant Hybrid Pullover Fleece Jacket - Men's
$89.95

Duckworth Maverick Crew - Men
Duckworth Maverick Crew - Men's
$89.95

SmartWool Micro 150 Henley - Men
SmartWool Micro 150 Henley - Men's
$89.95

Under Armour Gamutlite 1/2-Zip Jacket - Men
Under Armour Gamutlite 1/2-Zip Jacket - Men's
$89.99

Icebreaker BodyFit 200 Oasis Crew - Men
Icebreaker BodyFit 200 Oasis Crew - Men's Gritstone Heather/Oxblood
$90

Mountain Equipment Eclipse Zip Top - Men
Mountain Equipment Eclipse Zip Top - Men's
On sale - now $90.72 - was $164.95

Icebreaker BodyFit 260 Winter Zone 1/2-Zip Top - Men
Icebreaker BodyFit 260 Winter Zone 1/2-Zip Top - Men's
On sale - now $91 - was $130

Arc
Arc'teryx Delta AR Zip Neck Shirt - Men's
On sale - now $93.71 - was $124.95

Marmot Thermo Fleece Hooded Top - Men
Marmot Thermo Fleece Hooded Top - Men's
On sale - now $94.46 - was $134.95

Duckworth Comet Henley Shirt - Men
Duckworth Comet Henley Shirt - Men's
$94.95

SmartWool NTS Midweight Crew - Men
SmartWool NTS Midweight Crew - Men's
$94.95

Airblaster Ninja Suit - Men
Airblaster Ninja Suit - Men's
On sale - now $95.96 - was $119.95

Icebreaker Compass Half-Zip Pullover Hoodie - Men
Icebreaker Compass Half-Zip Pullover Hoodie - Men's
On sale - now $96 - was $160

Mountain Equipment Eclipse Half-Zip Hoodie - Men
Mountain Equipment Eclipse Half-Zip Hoodie - Men's
On sale - now $98.97 - was $179.95

Arc
Arc'teryx Delta LT Zip-Neck Top - Men's Black
$99

Ibex Shak Classic Full-Zip Top - Men
Ibex Shak Classic Full-Zip Top - Men's
On sale - now $99 - was $165

SmartWool NTS Midweight Zip Top - Men
SmartWool NTS Midweight Zip Top - Men's
$99.95

Icebreaker BodyFit 200 Oasis Zip-Neck Top - Men
Icebreaker BodyFit 200 Oasis Zip-Neck Top - Men's
$100

Norr Wool Round Neck Top - Men
Norr Wool Round Neck Top - Men's
$100

Ibex Woolies 2 Crew Top - Men
Ibex Woolies 2 Crew Top - Men's
$100

Marmot Powertherm 1/2-Zip Wool Top - Men
Marmot Powertherm 1/2-Zip Wool Top - Men's
On sale - now $101.97 - was $169.95

SmartWool Midweight Pattern Crew - Men
SmartWool Midweight Pattern Crew - Men's
$104.95

SmartWool NTS Midweight 250 Color Block Crew - Men
SmartWool NTS Midweight 250 Color Block Crew - Men's Deep Navy/Dark Blue Steel Heather
$104.95

Icebreaker Descender Half-Zip Top - Men
Icebreaker Descender Half-Zip Top - Men's
On sale - now $108 - was $180

Ibex Shak T-Neck Jersey - Men
Ibex Shak T-Neck Jersey - Men's
On sale - now $108.5 - was $155

Ortovox Rock N Wool Top - Men
Ortovox Rock N Wool Top - Men's
$108.95

Outdoor Research Radiant Hybrid Hooded Top - Men
Outdoor Research Radiant Hybrid Hooded Top - Men's
$109.95

Simms Montana Wool Mid Top - Men
Simms Montana Wool Mid Top - Men's
$109.95

SmartWool NTS Mid 250 Pattern Zip Top - Men
SmartWool NTS Mid 250 Pattern Zip Top - Men's
$109.95

Icebreaker Bodyfit 200 Zone Crew - Men
Icebreaker Bodyfit 200 Zone Crew - Men's
$110

Mons Royale Motatapu Hooded 1/2-Zip Top - Men
Mons Royale Motatapu Hooded 1/2-Zip Top - Men's
On sale - now $110.47 - was $169.95

Minus 33 Kobuk Expedition Zip-Neck Top - Men
Minus 33 Kobuk Expedition Zip-Neck Top - Men's
$110.99

Arc
Arc'teryx Konseal 3/4-Zip Fleece Hoodie - Men's
On sale - now $115.5 - was $165

Arc
Arc'teryx Satoro AR Crew Top - Men's
$119

Patagonia Capilene Thermal Weight Hooded Zip-Neck Top - Men
Patagonia Capilene Thermal Weight Hooded Zip-Neck Top - Men's Smolder Blue/Electron Blue X-dye
$119

Craft Stars and Stripes Active Extreme Set - Men
Craft Stars and Stripes Active Extreme Set - Men's
$119.95

Norr Wool Zip Neck Top - Men
Norr Wool Zip Neck Top - Men's
$120

The North Face Summit L1 Baselayer Top - Men
The North Face Summit L1 Baselayer Top - Men's
$124.95

Rab Merino Plus 160 Hooded Top - Men
Rab Merino Plus 160 Hooded Top - Men's
$124.95

Arc
Arc'teryx Rho LT Zip Top - Men's Alpine Slate
$125

The North Face Progressor Top - Men
The North Face Progressor Top - Men's
$128.95

SmartWool NTS 250 Midweight Hoodie - Men
SmartWool NTS 250 Midweight Hoodie - Men's
$129.95

Mammut Moench Shirt - Men
Mammut Moench Shirt - Men's Black
$129.95

SmartWool NTS Midweight 250 Color Block Pullover Hoodie - Men
SmartWool NTS Midweight 250 Color Block Pullover Hoodie - Men's
$129.95

Arc
Arc'teryx Satoro AR Zip Neck Top - Men's
$139

Simms Montana Techwool 1/2-Zip Top - Men
Simms Montana Techwool 1/2-Zip Top - Men's
$139.95

Airblaster Merino Wool Ninja Suit - Men
Airblaster Merino Wool Ninja Suit - Men's
On sale - now $142.46 - was $189.95

Arc
Arc'teryx Rho AR Zip-Neck Top - Men's
$145

Arc
Arc'teryx Stryka Hooded Jacket - Men's
$149

Norr Super Hoodie - Men
Norr Super Hoodie - Men's
$149

Norr Wool Hoodie - Men
Norr Wool Hoodie - Men's
$150

SmartWool Propulsion 60 Hybrid Jacket - 1/2-Zip - Men
SmartWool Propulsion 60 Hybrid Jacket - 1/2-Zip - Men's
$179.95

Norr Super One-Piece - Men
Norr Super One-Piece - Men's
$199