Double layered fabric for extra warmth and cold-weather protection Low-profile, skullcap design is designed to comfortably fit under your helmet Stylish hat made from fluffy, recycled polyester material for cold temperatures; quick-drying and breathable Marmot crafts professional quality outdoor gear, born from working mountain guides and instructors. Inspired by the Alpinist spirit of adventure to search and achieve in a harsh world, our products are simple, appropriate, dependable and good looking. PFAS-Free