Shop Smartwool Base Layer Clothing

Men's Classic Thermal Merino Base Layer Crew

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 Bottom

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

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

Women's Classic Thermal Merino Base Layer Bottom

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

Women's Everyday Merino Bikini

Men's Classic Thermal Merino Base Layer Bottom

Women's Intraknit Thermal Merino Base Layer Crew Top

Women's Thermal Merino Rib Turtleneck

Women's Intraknit Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Bottom Plus

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

Women's Classic Thermal Merino Base Layer Crew Plus Top

Men's Classic Thermal Merino Base Layer Colorblock Crew Top

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

Women's Classic Thermal Merino Base Layer Bottom

Men's Merino Boxer Brief

Men's Active Boxer Brief

Women's Intraknit Hipster

Men's Classic Thermal Merino Base Layer Bottom

Women's Intraknit Bikini

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

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

Men's Intraknit 6" Boxer Brief

Women's Intraknit Thermal Merino Base Layer Pattern Crew Top

Men's Classic Thermal Merino Base Layer Colorblock Crew

Women's Active Biker Short