Shop Smartwool Base Layer Clothing

Women's Intraknit Thermal Merino Base Layer Crew Top

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

Women's Classic Thermal Merino Base Layer Crew Top

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

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

Men's Classic Thermal Merino Base Layer Crew Top

Women's Merino Blend Bralette

Women's Classic All-Season Merino Base Layer Crew Top

Women's Classic Thermal Merino Base Layer Bottom

Women's Active Crop Bra

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

Men's Classic All-Season Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Crew Top Boxed

Men's Intraknit Thermal Merino Base Layer Crew Top

Women's Thermal Merino Rib Turtleneck

Kids' Classic Thermal Merino Base Layer Crew Top

Women's Classic Thermal Merino Base Layer Bottom Boxed

Men's Merino Boxer Brief Boxed

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

Men's Classic Thermal Merino Base Layer Crew Top Boxed

Women's Intraknit Hipster

Women's Intraknit Thermal Merino Base Layer Bottom

Kids' Classic Thermal Merino Base Layer Bottom

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

Men's Active Boxer Brief Boxed

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

Men's Wind Boxer Brief

Men's Classic Thermal Merino Base Layer Bottom Boxed

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

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