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 Classic Thermal 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

Women's Intraknit Thermal Max Merino Base Layer Bottom

Women's Classic All-Season Merino Base Layer Bottom

Women's Merino Sport Fleece Wind Tight

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

Women's Classic Thermal Merino Base Layer Pattern Bottom

Kid's Classic Thermal Merino Base Layer Pattern Bottom

Women's Intraknit Active Base Layer Bottom

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 Bottom Plus

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