Turtle Fur Comfort Shell UV Detonator Cap, Light Performance Helmet Liner, Cosmic Abundance Size: Adult, One Size fits most. Also fits Juniors and Teens Single-layer Comfort Shell Lightweight Performance Fabric - 92% Polyester, 8% Spandex UPF 50+ Sun Protection - Blocks 97% of UV Rays Anti-Microbial and High-Wicking Perfect for skiing, snowboarding, snowshoeing, running, hiking, camping and an active lifestyle.