snow first layer

100% Merino. 100% capable. Smartwools Women's Classic Thermal Merino Base Layer B is always ready for what's ahead and what's next. With a fit upda...

Meet the new and improved Women's Classic Thermal Merino Base Layer Crew. Smartwool updated its 100% Merino wool fan favorite with new color option...

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 ...

Smartwool has updated the fit of their Men's Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As...

100% Merino. 100% capable. Smartwools Women's Classic Thermal Merino Base Layer B is always ready for what's ahead and what's next. With a fit upda...

100% Merino. 100% capable. Smartwools Women's Classic Thermal Merino Base Layer B is always ready for what's ahead and what's next. With a fit upda...

This minimalist-style crew is anything but insignificant. Smartwools Women's Intraknit™ Thermal Merino Base Layer Crew is a lightweight, super-move...

With floral patterns and even more functionality, Women's Intraknit™ Thermal Merino Base Layer Pattern Crew is engineered to enhance your performan...

The original Pepper in the Hot Chillys Peppers Collection, Pepper Skins are your standard, dependable thermals. Originally designed with the workin...

These kids' thermal base layer pants have a single jersey knit with slight brushing for a soft, lived-in feel. The MTF polyester fibers of our Pepp...

The original Pepper in the Hot Chillys Peppers Collection, Pepper Skins are your standard, dependable thermals. Originally designed with the workin...

The original Pepper in the Hot Chillys Peppers Collection, Pepper Skins are your standard, dependable thermals. Originally designed with the workin...

These women's thermal leggings have a single jersey knit with slight brushing for a soft, lived-in feel. MTF polyester fibers work to transport moi...

Meet the new and improved Women's Classic Thermal Merino Base Layer Crew. Smartwool has updated its 100% Merino wool fan-favorite with new color op...

Meet the new and improved Women's Classic Thermal Merino Base Layer Crew. Smartwool has updated its 100% Merino wool fan-favorite with new color op...

Description Our Kids' Classic Thermal Merino Base Layer Crew is made of 100% responsibly sourced Merino wool to help your little ones stay comforta...

Built to fit, flex, and follow you like a shadow, our Women's Intraknit™ Thermal Merino Base Layer Bottom uses our innovative 3D knitting technolog...

Built to fit, flex, and follow you like a shadow, our Women's Intraknit™ Thermal Merino Base Layer Bottom uses our innovative 3D knitting technolog...

Our Kids' Classic Thermal Merino Base Layer Bottom uses our super soft Mid 250 interlock knit—perfect for layering in cool conditions and great for...

Whether you're taking on the Nordic trails or heading out for a cooler-weather hike, the Men's Classic All-Season Merino Base Layer 3/4 Bottom is p...

The original Pepper in the Hot Chillys Peppers Collection, Pepper Skins are your standard, dependable thermals. Originally designed with the workin...

Your go-to for a classic base layer, Micro-Elite Chamois is synonymous with the Hot Chillys brand. The descendant of the first technical baselayer ...

It's hard to beat THE ORIGINAL. This is the one-piece hooded base layer that started it all, developed to virtual perfection over the course of 15 ...

Ninja with the top down. If you feel claustrophobic in a hood, prefer classic mock neck base layer, or just like to let your hair blow in the wind,...