evo.com | Smartwool Long Underwear Tops > 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 Crew Top. With a super soft and comfy next-to-skin feel, Merino 250 fabric offers breathable warmth for cold days on the mountain and works great worn on it's own for milder days around town. Primo warmth to keep the good times going. 100% Merino Wool Made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance. Crew Neck with Set Sleeves Fabric Weight | Merino 250 This heavier, soft, 100% Merino wool fabric offers breathable warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. Slim Fit Flatlock Seam Construction Designed to Eliminate Chafing | Kid's Smartwool Classic Thermal Base Layer Crew Top 2026 - X-Small Pink