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

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


REI Co-op  Lightweight Base Layer Crew Top - Men
REI Co-op Lightweight Base Layer Crew Top - Men's
$29.95

Odlo  Kinship Light Crew Base Layer Top - Men
Odlo Kinship Light Crew Base Layer Top - Men's
On sale - now $31.83
was $65

Burton  Midweight X Base Layer Crew Top - Men
Burton Midweight X Base Layer Crew Top - Men's
On sale - now $34.93
was $69.95

Picture Organic Clothing  Nangha Base Layer Top - Men
Picture Organic Clothing Nangha Base Layer Top - Men's
On sale - now $36.83
was $75

REI Co-op  Lightweight Base Layer Long-Sleeve Crew Top - Men
REI Co-op Lightweight Base Layer Long-Sleeve Crew Top - Men's
$39.95

REI Co-op  Lightweight Base Layer Long-Sleeve Crew Top Tall Sizes - Men
REI Co-op Lightweight Base Layer Long-Sleeve Crew Top Tall Sizes - Men's
$39.95

L.L.Bean Lightweight Base Layer Crew Long Sleeve
L.L.Bean Lightweight Base Layer Crew Long Sleeve
$39.95

Carhartt Men
Carhartt Men's Force Heavyweight Polyester-Wool Base Layer Long Sleeve Shirt
On sale - now $39.99
was $44.99

Carhartt Men
Carhartt Men's Force Midweight Classic Henley Thermal Base Layer Long Sleeve Shirt
$39.99

Carhartt Men
Carhartt Men's Force Midweight Classic Henley Thermal Base Layer Long Sleeve Shirt
$39.99

Carhartt Men
Carhartt Men's Force Midweight Classic Henley Thermal Base Layer Long Sleeve Shirt
$39.99

L.L.Bean Fleece Base Layer Long Sleeve Crew Print
L.L.Bean Fleece Base Layer Long Sleeve Crew Print
On sale - now $41.36
was $49.95

Odlo  Whistler Eco Long-Sleeve Half-Zip Base Layer Top - Men
Odlo Whistler Eco Long-Sleeve Half-Zip Base Layer Top - Men's
On sale - now $44.83
was $90

REI Co-op  Lightweight Base Layer Half-Zip Top - Men
REI Co-op Lightweight Base Layer Half-Zip Top - Men's
$44.95

REI Co-op  Lightweight Base Layer Long-Sleeve Zip-Neck Top Tall Sizes - Men
REI Co-op Lightweight Base Layer Long-Sleeve Zip-Neck Top Tall Sizes - Men's
$44.95

L.L.Bean Fleece Base Layer Long Sleeve Crew
L.L.Bean Fleece Base Layer Long Sleeve Crew
$44.95

Ariat Big Tall Rebar Gridwork Balaclva Long Sleeve Base Layer
Ariat Big Tall Rebar Gridwork Balaclva Long Sleeve Base Layer
On sale - now $44.99
was $54.95

Carhartt Men
Carhartt Men's Force Heavyweight Thermal Base Layer Long Sleeve Pocket Shirt
On sale - now $44.99
was $59.99

Carhartt Men
Carhartt Men's Force Heavyweight Thermal Base Layer Long Sleeve Pocket Shirt
On sale - now $44.99
was $49.99

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
On sale - now $44.99
was $57.99

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
On sale - now $44.99
was $57.99

Craft  Active Intensity Base Layer Top - Men
Craft Active Intensity Base Layer Top - Men's
On sale - now $46.73
was $64.98

Threads 4 Thought  Brennan Base Layer Long-Sleeve Quarter-Zip Top - Men
Threads 4 Thought Brennan Base Layer Long-Sleeve Quarter-Zip Top - Men's
On sale - now $46.73
was $68

Saxx  Viewfinder Long-Sleeve Crew Base Layer Top - Men
Saxx Viewfinder Long-Sleeve Crew Base Layer Top - Men's
On sale - now $47.73
was $75

Billabong Operator Graphene Long Sleeve Base Layer
Billabong Operator Graphene Long Sleeve Base Layer
$49.9

L.L.Bean Midweight Base Layer Crew Long Sleeve
L.L.Bean Midweight Base Layer Crew Long Sleeve
$49.95

L.L.Bean Midweight Base Layer Crew Long Sleeve
L.L.Bean Midweight Base Layer Crew Long Sleeve
$49.95

L.L.Bean Midweight Base Layer Crew Long Sleeve Tall
L.L.Bean Midweight Base Layer Crew Long Sleeve Tall
$49.95

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
On sale - now $49.99
was $54.99

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
On sale - now $49.99
was $61.99

Carhartt Men
Carhartt Men's Force Heavyweight Polyester-Wool Base Layer Long Sleeve Shirt
On sale - now $49.99
was $54.99

Carhartt Men
Carhartt Men's Force Heavyweight Polyester-Wool Base Layer Long Sleeve Shirt
$49.99

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
On sale - now $49.99
was $64.99

Carhartt Men
Carhartt Men's Tall Size Force Midweight Tech Thermal Base Layer Long Sleeve Shirt
On sale - now $49.99
was $53.99

Carhartt Men
Carhartt Men's Tall Size Force Midweight Tech Thermal Base Layer Long Sleeve Shirt
On sale - now $49.99
was $53.99

Smartwool Merino 150 Plant-Based Dye Base Layer Long Sleeve
Smartwool Merino 150 Plant-Based Dye Base Layer Long Sleeve
On sale - now $51
was $85

Craft Core Warm Base Layer Set
Craft Core Warm Base Layer Set
On sale - now $51.28
was $79.99

Obermeyer  Lean Crew Base Layer Top - Men
Obermeyer Lean Crew Base Layer Top - Men's
On sale - now $54.73
was $79

Saxx  Viewfinder Long-Sleeve Half-Zip Base Layer Top - Men
Saxx Viewfinder Long-Sleeve Half-Zip Base Layer Top - Men's
On sale - now $54.73
was $80

L.L.Bean Midweight Base Layer 1/4 Zip Tall
L.L.Bean Midweight Base Layer 1/4 Zip Tall
$54.95

Bulwark FR Big Tall Long Sleeve FR Base Layer with Concealed Chest Pocket
Bulwark FR Big Tall Long Sleeve FR Base Layer with Concealed Chest Pocket
On sale - now $54.99
was $67

Bulwark FR Long Sleeve FR Base Layer with Concealed Chest Pocket
Bulwark FR Long Sleeve FR Base Layer with Concealed Chest Pocket
On sale - now $54.99
was $67

Pearl Izumi Transfer Mesh Sleeveless Base Layer
Pearl Izumi Transfer Mesh Sleeveless Base Layer
$55

Carhartt Men
Carhartt Men's Force Heavyweight Thermal Base Layer Long Sleeve Pocket Shirt
$55.99

Carhartt Men
Carhartt Men's Force Heavyweight Thermal Base Layer Long Sleeve Pocket Shirt
$55.99

Carhartt Men
Carhartt Men's Force Heavyweight Thermal Base Layer Long Sleeve Pocket Shirt
On sale - now $55.99
was $59.99

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
On sale - now $55.99
was $57.99

Saxx  Quest Long-Sleeve Crew Base Layer Top - Men
Saxx Quest Long-Sleeve Crew Base Layer Top - Men's
$58

Icebreaker  200 Oasis Crewe Base Layer Top - Men
Icebreaker 200 Oasis Crewe Base Layer Top - Men's
On sale - now $58.93
was $85

Burton  Midweight Base Layer Crew Top - Men
Burton Midweight Base Layer Crew Top - Men's
$59.95

REI Co-op  Midweight Base Layer Half-Zip Top - Men
REI Co-op Midweight Base Layer Half-Zip Top - Men's
$59.95

Burton Lightweight X Base Layer
Burton Lightweight X Base Layer
$59.95

Smartwool Merino 150 Base Layer Short Sleeve
Smartwool Merino 150 Base Layer Short Sleeve
On sale - now $59.99
was $75

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
$61.99

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
$61.99

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
On sale - now $61.99
was $64.99

Carhartt Men
Carhartt Men's Force Tech Quarter-Zip Thermal Base Layer Long Sleeve Shirt
$61.99

Obermeyer  Lean Half-Zip Base Layer Top - Men
Obermeyer Lean Half-Zip Base Layer Top - Men's
On sale - now $62.73
was $99

Smartwool  Merino 150 Long-Sleeve Base Layer Top - Men
Smartwool Merino 150 Long-Sleeve Base Layer Top - Men's
On sale - now $63.73
was $85

Ariat Big Tall Rebar Gridwork Balaclva Long Sleeve Base Layer
Ariat Big Tall Rebar Gridwork Balaclva Long Sleeve Base Layer
$64.95

Windstopper Base Layer Sleeveless Shirt - Men
Windstopper Base Layer Sleeveless Shirt - Men's
$0

Windstopper Base Layer Sleeveless Shirt - Men
Windstopper Base Layer Sleeveless Shirt - Men's
$0

Bulwark FR Big Tall Long Sleeve FR Base Layer with Concealed Chest Pocket
Bulwark FR Big Tall Long Sleeve FR Base Layer with Concealed Chest Pocket
$67

Bulwark FR Long Sleeve FR Base Layer with Concealed Chest Pocket
Bulwark FR Long Sleeve FR Base Layer with Concealed Chest Pocket
$67

Motus SL Crew Neck Shirt SS Men
Motus SL Crew Neck Shirt SS Men's
$69

Motus SL Crew Neck Shirt SS Men
Motus SL Crew Neck Shirt SS Men's
$69

Motus SL Crew Neck Shirt SS Men
Motus SL Crew Neck Shirt SS Men's
$69

Motus SL Crew Neck Shirt SS Men
Motus SL Crew Neck Shirt SS Men's
$69

Odlo  Blackcomb Base Layer Top with Face Mask - Men
Odlo Blackcomb Base Layer Top with Face Mask - Men's
On sale - now $69.73
was $110

Patagonia  Capilene Thermal Weight Zip-Neck Base Layer Top - Men
Patagonia Capilene Thermal Weight Zip-Neck Base Layer Top - Men's
On sale - now $69.73
was $99

Saxx  Roast Master Midweight Crew Base Layer Top - Men
Saxx Roast Master Midweight Crew Base Layer Top - Men's
$75

SAXX UNDERWEAR Roast Master Midweight Long Sleeve Base Layer
SAXX UNDERWEAR Roast Master Midweight Long Sleeve Base Layer
$75

SAXX UNDERWEAR Roast Master Midweight Long Sleeve Base Layer
SAXX UNDERWEAR Roast Master Midweight Long Sleeve Base Layer
$75

SAXX UNDERWEAR Roast Master Midweight Long Sleeve Base Layer
SAXX UNDERWEAR Roast Master Midweight Long Sleeve Base Layer
$75

Smartwool Merino 150 Base Layer Short Sleeve
Smartwool Merino 150 Base Layer Short Sleeve
$75

Smartwool Merino 150 Base Layer Short Sleeve
Smartwool Merino 150 Base Layer Short Sleeve
$75

Smartwool Merino 150 Base Layer Short Sleeve
Smartwool Merino 150 Base Layer Short Sleeve
$75

Smartwool Merino 150 Plant-Based Dye Base Layer Short Sleeve
Smartwool Merino 150 Plant-Based Dye Base Layer Short Sleeve
$75

Smartwool Merino 150 Plant-Based Dye Base Layer Short Sleeve
Smartwool Merino 150 Plant-Based Dye Base Layer Short Sleeve
$75

Smartwool Merino 150 Plant-Based Dye Base Layer Short Sleeve
Smartwool Merino 150 Plant-Based Dye Base Layer Short Sleeve
$75

Patagonia  Capilene Midweight Crew Base Layer Top - Men
Patagonia Capilene Midweight Crew Base Layer Top - Men's
$79

REI Co-op  Merino 185 Long-Sleeve Base Layer Top - Men
REI Co-op Merino 185 Long-Sleeve Base Layer Top - Men's
$79.95

REI Co-op  Merino 185 Long-Sleeve Base Layer Top Tall Sizes - Men
REI Co-op Merino 185 Long-Sleeve Base Layer Top Tall Sizes - Men's
$79.95

Windstopper Base Layer Long Sleeve Shirt - Men
Windstopper Base Layer Long Sleeve Shirt - Men's
$0

Windstopper Base Layer Long Sleeve Shirt - Men
Windstopper Base Layer Long Sleeve Shirt - Men's
$0

Windstopper Base Layer Shirt - Men
Windstopper Base Layer Shirt - Men's
$0

Windstopper Base Layer Shirt - Men
Windstopper Base Layer Shirt - Men's
$0

Smartwool  Classic Thermal Merino Colorblock Base Layer Crew Top - Men
Smartwool Classic Thermal Merino Colorblock Base Layer Crew Top - Men's
On sale - now $82.73
was $110

Smartwool  Intraknit Thermal Merino Colorblock Crew Base Layer Top - Men
Smartwool Intraknit Thermal Merino Colorblock Crew Base Layer Top - Men's
On sale - now $82.73
was $120

Smartwool  Merino 250 Pattern Crew Base Layer Top - Men
Smartwool Merino 250 Pattern Crew Base Layer Top - Men's
On sale - now $82.73
was $110

Smartwool  Merino 250 Plant-Based Dye Logo Crew Base Layer Top - Men
Smartwool Merino 250 Plant-Based Dye Logo Crew Base Layer Top - Men's
On sale - now $82.73
was $110

Icebreaker  200 Oasis Long-Sleeve Crew Move to Natural Base Layer Top - Men
Icebreaker 200 Oasis Long-Sleeve Crew Move to Natural Base Layer Top - Men's
On sale - now $83.73
was $105

Smartwool  Classic All-Season Merino Base Layer Long-Sleeve Top - Men
Smartwool Classic All-Season Merino Base Layer Long-Sleeve Top - Men's
$85

Icebreaker 175 Everyday Merino Base Layer Long Sleeve Crewe
Icebreaker 175 Everyday Merino Base Layer Long Sleeve Crewe
$85

SAXX UNDERWEAR Roast Master Heavyweight Long Sleeve Base Layer
SAXX UNDERWEAR Roast Master Heavyweight Long Sleeve Base Layer
$85

SAXX UNDERWEAR Roast Master Heavyweight Long Sleeve Base Layer
SAXX UNDERWEAR Roast Master Heavyweight Long Sleeve Base Layer
$85

SAXX UNDERWEAR Roast Master Heavyweight Long Sleeve Base Layer
SAXX UNDERWEAR Roast Master Heavyweight Long Sleeve Base Layer
$85

Smartwool Merino 150 Base Layer Long Sleeve
Smartwool Merino 150 Base Layer Long Sleeve
$85

Smartwool Merino 150 Base Layer Long Sleeve
Smartwool Merino 150 Base Layer Long Sleeve
$85

Smartwool Merino 150 Base Layer Long Sleeve
Smartwool Merino 150 Base Layer Long Sleeve
$85

Smartwool Merino 150 Plant-Based Dye Base Layer Long Sleeve
Smartwool Merino 150 Plant-Based Dye Base Layer Long Sleeve
$85

Smartwool Merino 150 Plant-Based Dye Base Layer Long Sleeve
Smartwool Merino 150 Plant-Based Dye Base Layer Long Sleeve
$85

Smartwool Merino 150 Plant-Based Dye Base Layer Long Sleeve
Smartwool Merino 150 Plant-Based Dye Base Layer Long Sleeve
$85

Odlo  Natural + Kinship Warm Base Layer Top with Face Mask - Men
Odlo Natural + Kinship Warm Base Layer Top with Face Mask - Men's
On sale - now $86.73
was $115

Patagonia  Capilene Midweight Zip-Neck Base Layer Top - Men
Patagonia Capilene Midweight Zip-Neck Base Layer Top - Men's
$89

Patagonia  Capilene Air Crew Base Layer Top - Men
Patagonia Capilene Air Crew Base Layer Top - Men's
On sale - now $89.73
was $129

REI Co-op  Merino 185 Long-Sleeve Half-Zip Base Layer Top - Men
REI Co-op Merino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
$89.95

REI Co-op  Merino 185 Long-Sleeve Half-Zip Base Layer Top Tall Sizes - Men
REI Co-op Merino 185 Long-Sleeve Half-Zip Base Layer Top Tall Sizes - Men's
$89.95

Burton Midweight X Base Layer Long Neck Hoodie
Burton Midweight X Base Layer Long Neck Hoodie
$89.95

Ariat Men
Ariat Men's Flame Resistant Polartec Powerdry Long Sleeve BaselayerHenley Shirt
On sale - now $89.95
was $104.95

Ariat Men
Ariat Men's Flame Resistant Polartec Powerdry Long Sleeve BaselayerHenley Shirt
On sale - now $89.95
was $109.95

Windstopper Base Layer Thermo Long-Sleeve Shirt - Men
Windstopper Base Layer Thermo Long-Sleeve Shirt - Men's
$62.97

Windstopper Base Layer Thermo Long-Sleeve Shirt - Men
Windstopper Base Layer Thermo Long-Sleeve Shirt - Men's
$62.97

Smartwool  Classic All-Season Merino Quarter-Zip Base Layer Top - Men
Smartwool Classic All-Season Merino Quarter-Zip Base Layer Top - Men's
$90

Smartwool Classic All-Season Merino Base Layer Vans Long Sleeve Crew
Smartwool Classic All-Season Merino Base Layer Vans Long Sleeve Crew
$90

Smartwool  Intraknit Thermal Merino Quarter-Zip Base Layer Top - Men
Smartwool Intraknit Thermal Merino Quarter-Zip Base Layer Top - Men's
On sale - now $97.73
was $130

Burton Heavyweight X Base Layer 1/4 Zip
Burton Heavyweight X Base Layer 1/4 Zip
$99.95

Windstopper Base Layer Thermo Turtleneck - Men
Windstopper Base Layer Thermo Turtleneck - Men's
$69.97

Windstopper Base Layer Thermo Turtleneck - Men
Windstopper Base Layer Thermo Turtleneck - Men's
$69.97

Helly Hansen  Lifa Merino Midweight Crew Base Layer Top - Men
Helly Hansen Lifa Merino Midweight Crew Base Layer Top - Men's
$100

Ortovox  120 Comp Light Long-Sleeve Base Layer Top - Men
Ortovox 120 Comp Light Long-Sleeve Base Layer Top - Men's
$100

Ortovox  185 Merino Rock
Ortovox 185 Merino Rock'n'wool Base Layer Top - Men's
$100

Artilect  Boulder 125 Crew Base Layer Top - Men
Artilect Boulder 125 Crew Base Layer Top - Men's
$110

Icebreaker  200 Oasis Crewe Ski Stripes Long-Sleeve Base Layer Top - Men
Icebreaker 200 Oasis Crewe Ski Stripes Long-Sleeve Base Layer Top - Men's
$110

Ortovox  185 Merino Rock
Ortovox 185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's
$110

Smartwool  Classic Thermal Merino Colorblock Base Layer Crew Top - Men
Smartwool Classic Thermal Merino Colorblock Base Layer Crew Top - Men's
$110

Smartwool  Classic Thermal Merino Crew Base Layer Top - Men
Smartwool Classic Thermal Merino Crew Base Layer Top - Men's
$110

Smartwool Merino 250 Base Layer Crew
Smartwool Merino 250 Base Layer Crew
$110

Smartwool Merino 250 Base Layer Crew
Smartwool Merino 250 Base Layer Crew
$110

Smartwool Merino 250 Base Layer Crew
Smartwool Merino 250 Base Layer Crew
$110

Smartwool Merino 250 Base Layer Crew
Smartwool Merino 250 Base Layer Crew
$110

Smartwool Merino 250 Base Layer Plant-Based Dye Logo Crew
Smartwool Merino 250 Base Layer Plant-Based Dye Logo Crew
$110

Smartwool Merino 250 Base Layer Plant-Based Dye Logo Crew
Smartwool Merino 250 Base Layer Plant-Based Dye Logo Crew
$110

Icebreaker  200 Oasis Half-Zip Base Layer Top - Men
Icebreaker 200 Oasis Half-Zip Base Layer Top - Men's
$115

Smartwool  Classic Thermal Merino Quarter-Zip Base Layer Top - Men
Smartwool Classic Thermal Merino Quarter-Zip Base Layer Top - Men's
$115

Rho Hybrid Crew Neck Men
Rho Hybrid Crew Neck Men's
$115

Rho Hybrid Crew Neck Men
Rho Hybrid Crew Neck Men's
$115

Rho Hybrid Crew Neck Men
Rho Hybrid Crew Neck Men's
$115

Artilect  Boulder 125 Quarter-Zip Base Layer Top - Men
Artilect Boulder 125 Quarter-Zip Base Layer Top - Men's
$120

Arc
Arc'teryx Rho LT Zip-Neck Base Layer Top - Men's
$125

Icebreaker  260 Tech Crewe Base Layer Top - Men
Icebreaker 260 Tech Crewe Base Layer Top - Men's
$125

Smartwool  Intraknit Thermal Merino Colorblock Crew Base Layer Top - Men
Smartwool Intraknit Thermal Merino Colorblock Crew Base Layer Top - Men's
$125

Smartwool  Intraknit Thermal Merino Crew Base Layer Top - Men
Smartwool Intraknit Thermal Merino Crew Base Layer Top - Men's
$125

Rho Hybrid 1/2 Zip Neck Men
Rho Hybrid 1/2 Zip Neck Men's
$125

Rho Hybrid 1/2 Zip Neck Men
Rho Hybrid 1/2 Zip Neck Men's
$125

Rho Hybrid 1/2 Zip Neck Men
Rho Hybrid 1/2 Zip Neck Men's
$125

Icebreaker 260 Tech Merino Base Layer Long Sleeve 1/2 Zip
Icebreaker 260 Tech Merino Base Layer Long Sleeve 1/2 Zip
$125

Artilect  Flatiron 185 Base Layer Crew Top - Men
Artilect Flatiron 185 Base Layer Crew Top - Men's
$130

Icebreaker 260 Zone Merino Base Layer Long Sleeve Crewe
Icebreaker 260 Zone Merino Base Layer Long Sleeve Crewe
$130

Icebreaker  260 Tech Half-Zip Base Layer Top - Men
Icebreaker 260 Tech Half-Zip Base Layer Top - Men's
$135

Smartwool  Intraknit Thermal Merino Quarter-Zip Base Layer Top - Men
Smartwool Intraknit Thermal Merino Quarter-Zip Base Layer Top - Men's
$135

Icebreaker  260 Zone Crew Base Layer Top - Men
Icebreaker 260 Zone Crew Base Layer Top - Men's
$140

Artilect  Darkhorse 185 Zoned Crew Base Layer Top - Men
Artilect Darkhorse 185 Zoned Crew Base Layer Top - Men's
$150

Icebreaker  260 Zone Half-Zip Base Layer Top - Men
Icebreaker 260 Zone Half-Zip Base Layer Top - Men's
$150

Smartwool  Intraknit Thermal Max Quarter-Zip Base Layer Top - Men
Smartwool Intraknit Thermal Max Quarter-Zip Base Layer Top - Men's
$150