Turtle Fur - Midweight Polartec Thermal Pro Stria Fleece Beanie, Grass Size One Size Size: Adult, One Size fits most. Also fits Juniors and Teens Single-layer Polartec Thermal Pro Stria fleece, a recycled fiber Breathable and Packable 100% Polyester (53% Recycled) Perfect for hiking/backpacking, skiing/snowboarding, and snowshoeing