Shop Smartwool Base Layer Bottoms

Women's Classic Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer 3/4 Bottom

Men's Classic All-Season Merino Base Layer Bottom

Men's Intraknit Thermal Merino Base Layer Bottom

Women's Intraknit Thermal Merino Base Layer Bottom

Women's Classic All-Season Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Bottom

Women's Active Leggings

Men's Classic Thermal Merino Base Layer Bottom

Men's Intraknit Thermal Merino Base Layer 3/4 Bottom

Men's Classic Thermal Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer Bottom Plus

Men's Classic All-Season Merino Base Layer 3/4 Bottom

Women's Intraknit Thermal Merino Base Layer 3/4 Bottom

Women's Classic All-Season Merino Base Layer Bottom Plus

Men's Classic All-Season Merino Base Layer Bottom

Men's Classic Thermal Merino Base Layer 3/4 Bottom

Women's Classic All-Season Merino Base Layer Bottom

Women's Classic Thermal Merino Base Layer 3/4 Bottom

Men's Classic All-Season Merino Base Layer Bottom Boxed

Women's Active Biker Short

Women's Intraknit Active Base Layer Bottom

Women's Classic Thermal Merino Base Layer 3/4 Bottom

Women's Classic Thermal Merino Base Layer Bottom Plus

Men's Intraknit Active Base Layer Bottom

Men's Classic All-Season Merino Base Layer Bottom

Men's Merino Plant-Based Dye Boxer Brief

Women's Classic All-Season Merino Base Layer Bottom Boxed

Women's Intraknit Thermal Max Merino Base Layer Bottom