Shop Smartwool Base Layer Tops

Women's Intraknit Thermal Merino Base Layer Crew Top

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

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

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

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

Men's Intraknit Thermal Merino Base Layer Crew Top

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

Men's Intraknit Thermal Merino Base Layer Colorblock Crew Top

Women's Thermal Merino Rib Turtleneck

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

Women's Classic Thermal Merino Base Layer Crew Plus Top

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

Women's Classic Thermal Merino Base Layer 1/2 Zippers Hoodie

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

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

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

Men's Classic Thermal Merino Base Layer Crew Top

Men's Classic Thermal Merino Base Layer Colorblock Crew Top

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

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

Men's Classic Thermal Merino Base Layer Crew

Men's Classic Thermal Merino Base Layer Crew Top

Women's Intraknit Thermal Merino Base Layer Pattern Crew Top

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

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

Women's Thermal Drape Neck Hoodie

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

Men's Classic All-Season Plant-Based Dye Merino Base Layer Long Sleeve

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

Women's Intraknit Thermal Max Merino Base Layer Pattern Hoodie