Shop Smartwool Base Layer Tops

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

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

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 Crew Top

Women's Classic Thermal Merino Base Layer Crew Top

Men's Intraknit Thermal Merino Base Layer Colorblock Crew Top

Women's Thermal Merino Rib Turtleneck

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

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

Women's Classic Thermal Merino Base Layer Crew Plus Top

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

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

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

Men's Classic Thermal Merino Base Layer Crew

Women's Intraknit Thermal Merino Base Layer Pattern Crew Top

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

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

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

Men's Classic Thermal Merino Base Layer Hoodie

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

Men's Classic Thermal Merino Base Layer Crew Top

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

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

Men's Classic Thermal Merino Base Layer Colorblock Crew

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