Size: Adult, One Size fits most. Also fits Juniors and Teens; Dimensions -10.5" (W) x 9.75" (L). Outer shell: Comfort Shell Performance Fabric - 92% Polyester, 8% Spandex. Stay warm and sun protected: UPF 50+ Sun Protection - Blocks 97% of UV Rays Fully-lined with 100% polyester Comfort Plush for extra comfortable next-to-skin softness. Perfect for skiing, snowboarding, snowshoeing, running and an active winter lifestyle. This neck warmer is packed with power. A quick-drying technical performance outer layer ensures breathability while the inner layer is insanely warm and soft against the skin.