Shop Smartwool Base Layer Clothing

Men's Classic Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Crew Top

Women's Classic Thermal 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 Intraknit Bikini

Women's Classic All-Season Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Crew

Men's Classic All-Season Merino Base Layer Bottom

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

Women's Everyday Merino Bikini

Men's Classic Thermal Merino Base Layer Crew

Women's Thermal Merino Rib Turtleneck

Women's Classic Thermal Merino Base Layer Bottom

Men's Merino Boxer Brief

Men's Active Boxer Brief

Women's Merino Bikini

Women's Classic All-Season Merino Base Layer Bottom

Men's Merino Plant-Based Dye Boxer Brief Boxed

Men's Merino Boxer Brief Boxed

Women's Intraknit Racerback Bra

Men's Classic All-Season Merino Base Layer Bottom

Men's Classic All-Season Merino Base Layer 1/4 Zip Boxed

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

Women's Merino Sport Seamless Bikini Boxed

Women's Merino Lace Bikini Boxed

Men's Classic All-Season Plant-Based Dye Merino Base Layer Long Sleeve

Women's Intraknit Strappy Bra

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

Men's Classic Thermal Merino Base Layer Crew Top