If you've ever had to cut a great day short because Junior got a bad case of the shivers, it's time to pick up the Smartwool Classic Thermal Merino Base Layer Bottoms. With a super soft and comfy next-to-skin feel, Merino 250 fabric offers breathable warmth for cold days on the mountain and is naturally moisture wicking and odor resistant. Primo warmth to keep the good times going.