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Men's Base Layers

Sleek bamboo, toasty wool, or versatile synthetic? When it comes to base layers, there’s a material for every occasion. Use our thin thermal underwear sets all year round and cozy up with our warmest base layers when the mercury drops. Regardless of the season, we have a base layer for you. All our men’s thermal underwear is snug-fitting, moisture-wicking, and fast-drying to keep you comfortable even during the most intense days in the great outdoors.

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View Products (24)
Sneaky Balaclava Base Layer Set Kalamata Men
New In
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1487 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,487)

Sneaky Balaclava Base Layer Set Men Kalamata 

Sneaky Balaclava Base Layer Set

Kalamata Men

$85
$85
+ 1
Fuse Merino Base Layer Set Stargazer Men
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
155 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.5 (155)

Fuse Merino Base Layer Set Men Stargazer 

Fuse Merino Base Layer Set

Stargazer Men

$119
$119
Hiball Waffle Base Layer Set Dark Denim Men
New In
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
707 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.8 (707)

Hiball Waffle Base Layer Set Men Dark Denim 

Hiball Waffle Base Layer Set

Dark Denim Men

$89
$89
+ 1
Bambooskin Base Layer Set Molten Lava Men
New In
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Molten Lava 

Bambooskin Base Layer Set

Molten Lava Men

$79
$79
10 more colors
+ 8
Sneaky Balaclava Base Layer Set Smokey Camo Men
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1487 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,487)

Sneaky Balaclava Base Layer Set Men Smokey Camo 

Sneaky Balaclava Base Layer Set

Smokey Camo Men

$85
$85
+ 1
Bambooskin Base Layer Set Anthracite Men
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Anthracite 

Bambooskin Base Layer Set

Anthracite Men

$79
$79
10 more colors
+ 8
Hiball Waffle Base Layer Set Olive Night Men
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
707 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.8 (707)

Hiball Waffle Base Layer Set Men Olive Night 

Hiball Waffle Base Layer Set

Olive Night Men

$89
$89
+ 1
Hiball Waffle Base Layer Set Black/Flame Men
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
707 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.8 (707)

Hiball Waffle Base Layer Set Men Black/Flame 

Hiball Waffle Base Layer Set

Black/Flame Men

$89
$89
+ 1
Bambooskin Base Layer Set Autumn Aztec Men
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Autumn Aztec 

Bambooskin Base Layer Set

Autumn Aztec Men

$79
$79
10 more colors
+ 8
Fuse Merino Base Layer Set Forest Night Men
New In
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
155 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.5 (155)

Fuse Merino Base Layer Set Men Forest Night 

Fuse Merino Base Layer Set

Forest Night Men

$119
$119
Hiball Waffle Base Layer Set Anthracite/Radiant Yellow Men
New In
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
707 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.8 (707)

Hiball Waffle Base Layer Set Men Anthracite/Radiant Yellow 

Hiball Waffle Base Layer Set

Anthracite/Radiant Yellow Men

$89
$89
+ 1
Bambooskin Base Layer Set Blueberry Men
New In
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Blueberry 

Bambooskin Base Layer Set

Blueberry Men

$79
$79
10 more colors
+ 8
Sneaky Balaclava Base Layer Set Black/Flame Men
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1487 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,487)

Sneaky Balaclava Base Layer Set Men Black/Flame 

Sneaky Balaclava Base Layer Set

Black/Flame Men

$85
$85
+ 1
Bambooskin Base Layer Set Forest Night Men
New In
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Forest Night 

Bambooskin Base Layer Set

Forest Night Men

$79
$79
10 more colors
+ 8
Sneaky Balaclava Base Layer Set Moonlit Ocean Men
New In
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1487 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,487)

Sneaky Balaclava Base Layer Set Men Moonlit Ocean 

Sneaky Balaclava Base Layer Set

Moonlit Ocean Men

$85
$85
+ 1
Bambooskin Base Layer Set Black/Grey Men
Out of stock
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Black/Grey 

Bambooskin Base Layer Set

Black/Grey Men

$79
$79
10 more colors
+ 8
Fuse Merino Base Layer Set Anthracite Men
Out of stock
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
155 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.5 (155)

Fuse Merino Base Layer Set Men Anthracite 

Fuse Merino Base Layer Set

Anthracite Men

$119
$119
Bambooskin Base Layer Set Sniper Camo Men
Out of stock
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Sniper Camo 

Bambooskin Base Layer Set

Sniper Camo Men

$79
$79
10 more colors
+ 8
Bambooskin Base Layer Set Butcher Camo Men
Out of stock
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Butcher Camo 

Bambooskin Base Layer Set

Butcher Camo Men

$79
$79
10 more colors
+ 8
Bambooskin Base Layer Set Grey Mr.Cozy Men
Out of stock
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Grey Mr.Cozy 

Bambooskin Base Layer Set

Grey Mr.Cozy Men

$79
$79
10 more colors
+ 8
Bambooskin Base Layer Set Grey Men
Out of stock
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Grey 

Bambooskin Base Layer Set

Grey Men

$79
$79
10 more colors
+ 8
Merino Wool Pants Captain Men
Out of stock
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
95 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.5 (95)

Merino Wool Pants Men Captain 

Merino Wool Pants

Captain Men

$59
$59
Bambooskin Base Layer Set Spot on Men
Out of stock
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
1803 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.7 (1,803)

Bambooskin Base Layer Set Men Spot on 

Bambooskin Base Layer Set

Spot on Men

$79
$79
10 more colors
+ 8
Merino Wool Pants Black/Fern Men
Out of stock
Slim Fit
Slim Fit
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
95 reviews
Star backgroundStar backgroundStar backgroundStar backgroundStar background
Filled starFilled starFilled starFilled starFilled star
4.5 (95)

Merino Wool Pants Men Black/Fern 

Merino Wool Pants

Black/Fern Men

$59
$59

Showing 24 of 24 products

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Men's Base Layers

Sleek bamboo, toasty wool, or versatile synthetic? When it comes to base layers, there’s a material for every occasion. Use our thin thermal underwear sets all year round and cozy up with our warmest base layers when the mercury drops. Regardless of the season, we have a base layer for you. All our men’s thermal underwear is snug-fitting, moisture-wicking, and fast-drying to keep you comfortable even during the most intense days in the great outdoors.

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