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 Bottom

Men's Classic Thermal Merino Base Layer Crew Top

Men's Intraknit Thermal Merino Base Layer Bottom

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

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

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

Men's Intraknit Thermal Merino Base Layer Crew Top

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 Long Sleeve Top

Women's Intraknit Thermal Merino Base Layer Bottom

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 Plus

Women's Classic Thermal Merino Base Layer Crew Plus Top

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

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

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

Women's Classic Thermal Merino Base Layer Crew

Women's Classic All-Season Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Bottom

Men's Merino Boxer Brief

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

Men's Classic Thermal Merino Base Layer Crew Top

Men's Everyday Merino Boxer Brief

Men's Merino Boxer Brief

Men's Active Boxer Brief

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