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About Men's Baselayer Clothing

Warmth and wicking performance are the primary benefits of our men’s baselayer clothing. Designed as a technical upgrade to traditional long underwear, our form-fitting styles enhance mobility and comfort when worn as the first layer in an active system. Trim fits reduce constriction when hiking, climbing, skiing or camping.

Sort By 1Viewing All ( 8 items )
Circuit 1/4-Zip Baselayer
Light Steel
$49.95-$54.95$39.99-$44.99First AscentAvailable in Tall
( 4 )
Expedition Weight Baselayer Pants
Black
$59.95-$69.95$54.99-$64.99First AscentAvailable in Tall
( 3 )
Midweight Crewneck Baselayer
BlackLimeade
$44.95-$49.95$39.99-$44.99First AscentAvailable in Tall
( 11 )
Midweight 1/4-Zip Baselayer
BlackSteel
$49.95-$54.95$44.99-$49.99First AscentAvailable in Tall
( 13 )
Expedition Weight 1/4-Zip Baselayer Top
Black
$69.95-$79.95$64.99-$74.99First AscentAvailable in Tall
( 4 )
Expedition Weight Crewneck Baselayer
Black
$59.95-$69.95$54.99-$64.99First AscentAvailable in Tall
( 4 )
Expedition Weight THERMOLENE® Bat Hang Hoodie
Black
$89.95-$99.95$69.99-$79.99First AscentAvailable in Tall
( 5 )
Midweight Baselayer Pants
Black
$44.95-$49.95$39.99-$44.99First AscentAvailable in Tall
( 6 )
1Viewing All ( 8 items )
Related Products
This next to skin midweight baselayer features Cocona technology that microscopically increases surface area and harnesses body heat to speed evaporation of perspiration during high output activities. Said simply: moisture moves faster so you stay dryer. And Cocona never washes...
Our warmest, next to skin layer, this wicking poly piece foundation keeps skin warm and dry in cold conditions. Grid construction trims bulk while delivering superior insulation....
This next to skin midweight baselayer features Cocona technology that microscopically increases surface area and harnesses body heat to speed evaporation of perspiration during high output activities. Said simply: moisture moves faster so you stay dryer. And Cocona never washes...
Our warmest, next to skin layer, this wicking polyester foundation piece keeps skin warm and dry in cold conditions. Grid construction trims bulk while delivering superior insulation....
Used either as a spring weight baselayer or for cool weather training, this efficient wicking shirt moves sweat quickly to keep you dry. A deep front zipper dumps excess heat fast....