Shop Smartwool Base Layer Tops

Women's Classic Thermal Merino Base Layer Crew Top

Men's Classic Thermal Merino Base Layer Crew Top

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 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 Thermal Merino Base Layer Crew Plus Top

Men's Classic Thermal Merino Base Layer Crew

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

Men's Classic Thermal Merino Base Layer Hoodie

Women's Thermal Merino Rib Turtleneck

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

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

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

Men's Classic Thermal Merino Base Layer Colorblock Crew Top

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

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

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

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

Men's Classic Thermal Merino Base Layer Pattern Crew

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

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

Men's Merino Short Sleeve Tee

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

Women's Thermal Drape Neck Hoodie

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

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

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