Shop Smartwool Base Layer Clothing

Women's Intraknit Thermal Merino Base Layer Crew Top

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

Women's Classic All-Season Merino Base Layer Crew Top

Men's Classic All-Season Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Crew Top

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

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

Men's Classic Thermal Merino Base Layer Crew Top

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

Women's Classic Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Bottom

Women's Classic All-Season Merino Base Layer Bottom

Women's Thermal Merino Rib Turtleneck

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

Men's Merino Boxer Brief Boxed

Men's Intraknit Thermal Merino Base Layer Bottom

Women's Intraknit Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Bottom Plus

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

Women's Classic Thermal Merino Base Layer Crew Plus Top

Men's Boxer Brief Boxed

Men's Active Boxer Brief Boxed

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

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

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

Women's Classic Thermal Merino Base Layer Bottom

Men's Everyday Merino Boxer Brief Boxed

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

Kids' Classic Thermal Merino Base Layer Bottom

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