Base Layer

Everyday boxers made with moisture-wicking, breathable TENCEL lyocell/spandex stretch jersey. Fair Trade Certified sewn.

We've updated our Men's Merino 250 Base Layer Bottom to bring you a better fitting, more functional tight. The technical benefits of 100% Merino wo...

We've updated the fit of our Men's Merino 250 Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of our heaviest b...

Change can be a good thing. We've improved the fit on our 100% Merino bottoms with new side seams and a curved seam in the back to help provide a s...

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

With a new fit that is designed to reduce excess fabric, our Women's Merino 250 Baselayer Pattern Bottom will help keep you looking good, while fee...

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

A classic, all-around polyester baselayer made with 50-100% recycled content. The smooth, soft face makes for easy layering. Hollow-core yarns and ...

A classic, all-around polyester baselayer made with 100% recycled content. The smooth, soft face makes for easy layering. Hollow-core yarns and a d...

Our new and improved Women's Merino 250 Base Layer 1/4 Zip is here to bring you a better feeling, better performing, and better-looking garment. As...

We designed Capilene Cool Trail, our softest performance knit, to keep you cool and dry when you're active, while providing day-long, next-to-skin ...

No Seams. Plenty of comfort. Our Women's Seamless Bikini Boxed features seamlessly knit Merino wool for enhanced comfort next to skin and a mesh kn...

Need a tee that does it all and still looks good? Our freshly redesigned Merino 150 Short Sleeve works undercover as a baselayer on cool mornings o...

Whether you're lounging at home or trekking to parts unknown, ultra-comfy, responsibly sourced Merino next to skin helps regulate body temperature,...

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

Made from our warmest baselayer fabric, these bottoms will keep you warm even on the coldest summits. Features a covered elastic waistband, flatloc...

Performance micro-mesh underwear that dries in under an hour, the cool-wearing Sender Briefs are made from moisture-wicking 89% recycled nylon/11% ...

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...

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...

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

Our Women's Merino 150 Base Layer Bottoms are the perfect layer to put on for your warm weather adventures. Made of lightweight, breathable Merino,...

A classic, all-around polyester baselayer made with 50-100% recycled content. The smooth, soft face makes for easy layering. Hollow-core yarns and ...