Shop Smartwool Base Layer Tops

Women's Classic Thermal Merino Base Layer Crew Top

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

Men's Classic Thermal Merino Base Layer Crew Top

Women'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 All-Season Merino Base Layer Long Sleeve Top

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

Women's Thermal Merino Rib Turtleneck

Men's Classic Thermal Merino Base Layer Hoodie

Men's Classic Thermal Merino Base Layer Colorblock Crew Top

Men's Classic Thermal Merino Base Layer Crew

Women's Intraknit Thermal Merino Base Layer Colorblock 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 All-Season Merino Base Layer Long Sleeve Plus Top

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

Women's Thermal Drape Neck Hoodie

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

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

Women's Merino 250 Baselayer Plant-Based Dye Logo Crew

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

Women's Classic Thermal Merino Base Layer Crew

Men's Classic 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