Men Underwear Base Layers

With traditional long johns, you often sacrifice weight and flexibility for sweet, sweet warmth – and the problem only gets worse the more you layer up. To create a better base layer from the inside out, our AKHG Boar’s Nest Base Layer Pants are made with innovative hollow-core fibers that...

Guys running in brisk weather tend to be in shorts (too cold), sweats (too baggy) or windbreakers (too chafing). Then there are guys who’ve seen the light: running tights. We built ours with ideal compression and made them with Dry on the Fly® fabric tech, the fastest-wicking, fastest-drying solution we...

Originally developed for the space program, ultra-light Aerogel polyester adapts to your body temperature for out-of-this world regulation. So it was the perfect insulation for the AirLoc base layer system. Engineered with body-mapped quilting for targeted warmth where you need it most. And stretchy jersey panels with gussets and articulated...

Originally developed for the space program, ultra-light Aerogel polyester adapts to your body temperature for out-of-this world regulation. So it was the perfect insulation for the AirLoc base layer system. Engineered with body-mapped quilting for targeted warmth where you need it most. Stretchy jersey panels and a Crouch Gusset® flex...

Don’t let summer’s scorch slow you down. This base layer tee features Armachillo® tech in every fiber, so it feels cool against skin and wicks sweat relentlessly. UPF 50 blocks the sun’s harshest rays, while anti-odor properties squelch stink through long, hot shifts. The cut sits close and layers under...

Summer heat hits hardest from the waist down. But these base layer pants fight back with Armachillo® fabric that wicks sweat, squelches stink and cools skin on contact. Our Bullpen® pouch gives your goods the room and support they deserve, while a seamless waistband won’t dig in. UPF 50 blocks...

Trade in those cotton thermal longies that get all soggy and stinky when you work up a sweat. Buck Naked® Base Layers are now a long stretch better at keeping you warm and comfortable. In diamond knit 4.4-oz. 93% nylon/7% spandex, they wick sweat, fight stink, won't pinch when you...

Trade in those cotton thermal longies that get all soggy and stinky when you work up a sweat. Buck Naked® Base Layers are now a long stretch better at keeping you warm and comfortable. In diamond knit 4.4-oz. 93% nylon/7% spandex, they wick sweat, fight stink, won't pinch when you...

The very first one-piece long johns valiantly sheltered soldiers during the Civil War, but we’ve set out to achieve a more perfect Union. Instead of thin jersey, we use the very same fabric that’s earned Buck Naked® underwear thousands of 5-star reviews. It’s smooth on skin, stretches when you move,...

Trade in those cotton thermal longies that get all soggy and stinky when you work up a sweat. Buck Naked® Base Layers are now a long stretch better at keeping you warm and comfortable. In diamond knit 4.4-oz. 93% nylon/7% spandex, they wick sweat, fight stink, won't pinch when you...

There’s cold and then there’s Noorvik cold. In this far remote Alaskan town, the nighttime temperatures don’t budge above freezing for months on end – and the days aren’t a whole lot warmer. For conditions this chilled, we’ve engineered our warmest base layers. The densely knit poly/spandex fabric is smooth...

There’s cold and then there’s Noorvik cold. In this far remote Alaskan town, the nighttime temperatures don’t budge above freezing for months on end – and the days aren’t a whole lot warmer. For conditions this chilled, we’ve engineered our warmest base layers. The densely knit poly/spandex fabric is smooth...

Merino wool has evolved for eons to be nature’s ultimate next-to-skin insulator. This superlatively soft fiber naturally regulates temperature, fights stink and wicks moisture to keep you feeling dry, warm and chafe-free all day. We’ve amped up its performance even more by adding quick-dry polyester and flexible spandex for more...

Merino wool has evolved for eons to be nature’s ultimate next-to-skin insulator. This superlatively soft fiber naturally regulates temperature, fights stink and wicks moisture to keep you feeling dry, warm and chafe-free all day. We’ve amped up its performance even more by adding quick-dry polyester and flexible spandex for more...