Shop Smartwool Base Layer Clothing

Men's Classic Thermal Merino Base Layer Crew

Women's Classic Thermal Merino Base Layer Crew Top

Men's Classic Thermal Merino Base Layer Crew Top

Men's Classic All-Season Merino Base Layer Bottom

Men's Classic All-Season Merino Base Layer Long Sleeve Top

Women's Classic All-Season Merino Base Layer Long Sleeve Top

Women's Classic Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer 1/4 Zippers Top

Women's Classic Thermal Merino Base Layer 1/4 Zippers Top

Women's Merino Blend Bralette

Women's Active Crop Bra

Men's Classic Thermal Merino Base Layer Bottom

Women's Intraknit Thermal Merino Base Layer Crew Top

Women's Classic All-Season Merino Base Layer 1/4 Zippers Top

Men's Intraknit Thermal Merino Base Layer Crew Top

Women's Thermal Merino Rib Turtleneck

Kid's Classic Thermal Merino Base Layer Crew Top

Women's Intraknit Thermal Merino Base Layer Bottom

Kid's Classic Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer 1/2 Zippers Hoodie

Women's Classic Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer 1/4 Zip

Women's Intraknit Thermal Merino Base Layer Colorblock 1/4 Zippers Top

Men's Merino Boxer Brief

Men's Active Boxer Brief

Women's Intraknit Hipster

Men's Classic Thermal Merino Base Layer Bottom

Women's Intraknit Bikini

Men's Wind Boxer Brief

Women's Classic Thermal Merino Base Layer 1/4 Zip Boxed