Shop Smartwool Base Layer Clothing @ Kittery Trading Post

Women's Classic Thermal Merino Base Layer Crew Top

Men's Classic Thermal Merino Base Layer Crew Top

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

Women's Classic Thermal Merino Base Layer Bottom

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

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

Women's Merino Blend Bralette

Men's Classic Thermal Merino Base Layer Bottom

Men's Intraknit Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Bottom Plus

Men's Classic Thermal Merino Base Layer Colorblock Crew Top

Men's Active Boxer Brief

Men's Merino Print Boxer Brief

Women's Merino Bikini

Kids' Classic Merino Blend Base Layer Bottom