Shop Smartwool Base Layer Clothing

Men's Classic Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Crew Top

Men's Classic Thermal Merino Base Layer Crew Top

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

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

Men's Merino Boxer Brief

Women's Intraknit Thermal Merino Base Layer Crew Top

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

Women's Merino Blend Bralette

Men's Intraknit Thermal Merino Base Layer Crew Top

Men's Active Boxer Brief

Women's Everyday Merino Bikini

Men's Intraknit Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Hoodie

Men's Classic All-Season Merino Base Layer Bottom

Women's Intraknit Hipster

Men's Everyday Merino Boxer Brief

Women's Thermal Merino Rib Turtleneck

Kid's Classic Thermal Merino Base Layer Crew Top

Men's Merino Boxer Brief

Women's Intraknit Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer One Piece Top

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

Women's Classic Thermal Merino Base Layer One Piece Top

Men's Classic Thermal Merino Base Layer Crew

Women's Classic All-Season Merino Base Layer Bottom

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