Shop Smartwool Base Layer Clothing

Men's Classic All-Season 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

Men's Classic Thermal Merino Base Layer Bottom

Women's Everyday Merino Bikini

Women's Intraknit Thermal Merino Base Layer Crew Top

Women's Merino Blend Bralette

Men's Active Boxer Brief

Men's Everyday Merino Boxer Brief

Women's Intraknit Hipster

Men's Intraknit Thermal Merino Base Layer Crew Top

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

Men's Intraknit Thermal Merino Base Layer Bottom

Men's Merino Boxer Brief

Men's Classic Thermal Merino Base Layer Hoodie

Kid's Classic Thermal Merino Base Layer Crew Top

Women's Thermal Merino Rib Turtleneck

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

Women's Active Crop Bra

Women's Intraknit Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer One Piece Top

Men's Classic Thermal Merino Base Layer One Piece Top

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

Women's Classic All-Season Merino Base Layer Bottom