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 Bottom

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

Men's Everyday Party Short Sleeve Button Down T-Shirt

Men's Intraknit Thermal Max 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

Women's Classic All-Season Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Crew

Men's Classic Thermal Merino Base Layer Crew Top

Women's Intraknit Thermal Merino Base Layer Bottom

Men's Intraknit Thermal Merino Base Layer Bottom

Women's Active Crop Bra

Men's Classic All-Season Merino Base Layer Bottom

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

Women's Classic Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Hoodie

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

Men's Classic Thermal Merino Base Layer Bottom

Women's Thermal Merino Rib Turtleneck

Women's Active Leggings

Men's Classic Thermal Merino Base Layer Crew

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