Shop Smartwool Base Layer Clothing

Women's Classic Thermal Merino Base Layer Crew Top

Women's Classic Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Crew Top

Women's Classic Thermal Merino Base Layer Crew

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

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

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

Women'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 Classic Thermal Merino Base Layer Bottom

Men's Active Boxer Brief

Women's Classic All-Season Merino Base Layer Crew

Men's Classic Thermal Merino Base Layer Colorblock Crew

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

Women's Classic Thermal Merino Base Layer Pattern Crew

Women's Merino Sport Fleece Wind Tight

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

Women's Active Biker Short

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

Men's Merino Sport Wind Boxer Brief

Women's Intraknit Thermal Max Merino Base Layer 1/4 Zip

Men's Classic Thermal Merino Base Layer Bottom

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

Men's Intraknit Thermal Merino Base Layer Bottom

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

Women's Classic All-Season Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Bottom

Men's Merino Boxer Brief