Shop Smartwool Base Layer Clothing

Men's Classic Thermal Merino Base Layer Crew

Men's Classic All-Season Merino Base Layer Bottom

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

Women's Classic Thermal Merino Base Layer Crew Top

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

Women's Merino Blend Bralette

Women's Classic Thermal Merino Base Layer Bottom

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

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

Women's Classic All-Season Merino Base Layer Bottom

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

Men's Intraknit Thermal Merino Base Layer Crew Top

Women's Everyday Merino Thong

Women's Intraknit Thermal Merino Base Layer Crew Top

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

Men's Intraknit Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Hoodie

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 Intraknit Thermal Merino Base Layer Colorblock Crew Top

Women's Intraknit Hipster

Men's Classic Thermal Merino Base Layer Colorblock Crew Top

Women's Classic Thermal Merino Base Layer Bottom

Men's Active Boxer Brief

Men's Merino Boxer Brief

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

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