Shop Smartwool Base Layer Tops @ Bivouac

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

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

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

Women's Thermal Merino Rib Turtleneck

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

Men's Intraknit Thermal Merino Base Layer Colorblock Crew Top

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

Men's Classic Thermal Merino Base Layer Colorblock Crew Top