Shop Smartwool Base Layer Clothing

Women's Classic Thermal Merino Base Layer Crew Top

Women's Classic Thermal Merino Base Layer Bottom

Women's Intraknit Thermal Merino Base Layer Bottom

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

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

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

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

Women's Classic Thermal Merino Base Layer Bottom

Women's Merino Blend Bralette

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

Women's Classic Thermal Merino Base Layer Bottom Plus

Women's Classic Thermal Merino Base Layer Crew Plus Top

Men's Classic All-Season Merino Base Layer Bottom

Women's Classic All-Season Merino Base Layer Bottom

Men's Classic All-Season Merino Base Layer 3/4 Bottom

Men's Active Boxer Brief

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

Men's Merino Print Boxer Brief

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

Men's Merino Boxer Brief

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

Women's Classic All-Season Merino Base Layer Bottom

Women's Intraknit Thermal Merino Base Layer Pattern Crew Top

Men's Merino Print Boxer Brief Boxed

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

Women's Merino Short Sleeve Tee

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

Men's Merino Boxer Brief Boxed

Men's Merino Short Sleeve Tee

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