Men's Baselayer

Stay warm with the Indera 880LS Men's Raschel Knit Heavyweight Long Sleeve Thermal Crew. Rated for extremely cold temperatures with the highest qua...

We've updated our Men's Classic Thermal Merino Base Layer Bottom to bring you a better fitting, more functional tight. The technical benefits of 10...

Our Men's Classic Thermal Merino Base Layer Colorblock Crew features 100% responsibly sourced Merino wool made with an interlock knit for enhanced ...

Meet the better-than-ever Men's Classic Thermal Merino Base Layer Crew. We've updated this 100% Merino wool fan-favorite with new colors and a new ...

The Thermolator 2.0 Crew Neck Top is the ideal piece for all day warmth and comfort while being out in the elements. This versatile piece features ...

These 5" Basic Poly/Cotton Boxer Briefs combine the mobility of Rugged Flex with the comfort of a cotton/poly blend. Available in 2-packs, for twic...

Whether you work on a winter road crew or hot factory floor, this men's half-zip thermal shirt helps you tackle the job in comfort. The heavyweight...

Since 1889, Carhartt has made durable workwear you can count on as you tackle the toughest jobs. This men's long-sleeve thermal henley is made of m...

From trekking across Thailand to traversing the toughest stretches of Baja, we've spent over 20 years perfecting the art of adventure—and underwear...

From trekking across Thailand to traversing the toughest stretches of Baja, we've spent over 20 years perfecting the art of adventure—and underwear...

9.5 oz.100% Combed Cotton Raschel Knit Thermals Traps and retains body heat Heavy raschel knit Minimal shrinkage Rated for extremely cold temperatu...

9.5 oz.100% Combed Cotton Raschel Knit Thermals Traps and retains body heat Heavy raschel knit Minimal shrinkage Rated for extremely cold temperatu...

Base Force: now made with 37.5™ Technology, which is scientifically proven to give you more stamina. Men's, Fitted, Lightweight Undershirt 4-ounce,...

Cut the morning chill with this men's thermal shirt. This base layer top was designed to keep you warm and comfortable in any time of year. It's ma...

These 5" Basic Poly/Cotton Boxer Briefs combine the mobility of Rugged Flex with the comfort of a cotton/poly blend. Available in 2-packs, for twic...

Built with sweat-wicking FastDry technology and stretchable Rugged Flex fabric, our 5" Tech Boxer Briefs work hard to keep you dry, comfortable, an...

17 countries. 6 weeks. One pair of award-winning underwear. (Ok, maybe two.) Join the thousands of people who have discovered the ExOfficio travel ...

Thermolator is the Terramar product where form perfectly meets function. The midweight fabric is ultra-soft and features ClimaSense Thermoregulatio...

Thermolator is the Terramar product where form perfectly meets function. The midweight fabric is ultra-soft and features ClimaSense Thermoregulatio...

Thermolator is the Terramar product where form perfectly meets function. The midweight fabric is ultra-soft and features ClimaSense Thermoregulatio...

17 countries. 6 weeks. One pair of award-winning underwear. (Ok, maybe two.)Join the thousands of people who have discovered the ExOfficio travel u...

17 countries. 6 weeks. One pair of award-winning underwear. (Ok, maybe two.) Join the thousands of people who have discovered the ExOfficio travel ...