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 All-Season Merino Base Layer Long Sleeve Top

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

Men's Everyday Party Short Sleeve Button Down T-Shirt

Men's Intraknit Thermal Merino Base Layer Crew Top

Women's Classic Thermal Merino Base Layer Crew

Men's Classic Thermal Merino Base Layer Crew Top

Women's Intraknit Thermal Merino Base Layer Bottom

Men's Intraknit Thermal Merino Base Layer Bottom

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

Women's Classic Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Hoodie

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

Men's Classic Thermal Merino Base Layer Bottom

Women's Thermal Merino Rib Turtleneck

Men's Classic Thermal Merino Base Layer Crew

Men's Classic Thermal Merino Base Layer Colorblock Crew Top

Men's Active Boxer Brief

Men's Classic Thermal Merino Base Layer Bottom

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

Men's Merino Boxer Brief

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

Men's Merino Print Boxer Brief

Men's Classic Thermal Merino Base Layer 3/4 Bottom

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

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

Women's Classic Thermal Merino Base Layer Bottom

Men's Merino Boxer Brief