SmartWool's Intraknit Thermal Vans base layer top is crafted from a moisture-wicking, temperature regulating merino wool thermal fabric blend to keep you warm as the temperatures drop. Designed in collaboration with Vans Itch-free merino wool is temperature regulating, moisture wicking and odor resistant Polyester, spandex and nylon added for stretch, durability and warmth Crew neck Chafe-free flat seams Close, layer-friendly fit