Shop Smartwool Base Layer Clothing

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 Bottom

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

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

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

Men's Classic Thermal Merino Base Layer Bottom

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

Men's Intraknit Thermal Merino Base Layer Crew Top

Women's Intraknit Thermal Merino Base Layer Crew Top

Women's Classic All-Season Merino Base Layer Bottom

Women's Intraknit Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Crew Top

Women's Merino Blend Bralette

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

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

Women's Classic Thermal Merino Base Layer Crew

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

Men's Intraknit Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Bottom Plus

Women's Active Leggings

Men's Classic All-Season Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Hoodie

Women's Thermal Merino Rib Turtleneck

Women's Active Crop Bra

Men's Classic Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Bottom

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

Women's Classic All-Season Merino Base Layer Bottom Plus

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