Shop Smartwool Base Layer Clothing

Men's Classic Thermal Merino Base Layer Bottom

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 Crew

Men's Classic Thermal Merino Base Layer Bottom

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 All-Season Merino Base Layer Long Sleeve Top

Men's Intraknit Thermal Merino Base Layer Crew Top

Women's Intraknit Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Crew Top

Women's Classic All-Season Merino Base Layer Bottom

Men's Classic All-Season Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Bottom

Women's Active Leggings

Women's Thermal Merino Rib Turtleneck

Men's Classic Thermal Merino Base Layer Crew

Women's Classic Thermal Merino Base Layer Bottom Plus

Women's Classic Thermal Merino Base Layer Crew Plus Top

Men's Classic Thermal Merino Base Layer Bottom

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

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

Men's Active Boxer Brief

Men's Merino Boxer Brief

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

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

Women's Intraknit Thermal Merino Base Layer Pattern Crew Top

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

Men's Classic Thermal Merino Base Layer Colorblock Crew

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