Base Layer Clothing

Over forty years ago Terramar was the first company to introduce pure silk performance base layer products. Today, Thermasilk is still the standard...

Buy the Wool Thermo LS w/Inlay locally.

With its innovative, seamless, 3-D knit structure, our Capilene Air Bottoms offer amazing warmth and comfort range. An airy blend of 51% responsibl...

Made from a quick-dry, wash-and-go fabric with odor resistance, this low-maintenance pair is like your favorite adventure partner: comfortable, sup...

Made from a quick-dry, wash-and-go fabric with odor resistance, this low-maintenance pair is like your favorite adventure partner: comfortable, sup...

Made from the same moisture-wicking material as our best-selling Vibe, Ultra comes in a Relaxed Fit it's a bit looser around the leg is equipped wi...

Bright, bold, and exceptionally breathable, Volt is a performance powerhouse designed to increase airflow when you're active. Constructed using a p...

Buy the Wool Thermo Longs w/Inlay locally.

Buy the Super Thermo C-Shirt locally.

The Kari Traa Fryd pant is a soft, quick-drying synthetic baselayer that's as warm as it is stunning. With a slim fit, the super-soft, 4-way stretc...

The Below Zero Performance Tight is the perfect piece to keep you warm. The extra durable four way stretch provides support and ease of movement in...

The Below Zero Crew is the perfect piece to keep you warm. The extra durable four way stretch provides support and ease of movement in all directio...

The Cloud Nine Performance Scoop is the ideal piece for all day warmth and comfort while being out in the elements. This versatile piece features a...

The Below Zero Half-Zip Top is the perfect piece to keep you warm. The extra durable four way stretch provides support and ease of movement in all ...

The Cloud Nine Performance Tight is the ideal piece for all day warmth and comfort while being out in the elements. This versatile piece features a...

The Cloud Nine Scoop Neck Top is the ideal piece for all day warmth and comfort while being out in the elements. This versatile piece features an u...

Meet the new and improved Women's Merino 250 Base Layer Crew. We've updated this 100% Merino wool fan-favorite with new color options and an enhanc...

Our most versatile baselayer: warm, breathable, quick-drying and with HeiQ Fresh durable odor control for daily use. The Capilene Midweight Crew hi...

With its innovative, seamless, 3-D knit structure, our Capilene Air Hoody offers amazing warmth and comfort range. An airy blend of 51% responsibly...

Buy the Super Thermo SS Tee locally.

With its innovative, seamless, 3-D knit structure, our Capilene Air Crew offers amazing warmth and comfort range. An airy blend of 51% responsibly ...

These men's boxer briefs are a triple threat of eco-friendly goodness, combining breathable material with anti-stink properties, plus Tencel Lyocel...

Start your layering system with our most innovative foundation to date; our Intraknit collection. Our Men's Intraknit Thermal Merino Base Layer Bot...

The wind is howling, and the snow looks like it isn't going to let up anytime soon. Sounds like the perfect time to pull on a pair of our Men's Mer...