Our Outdoor Sun Hat for Women is made of 100% Nylon, making it waterproof, sweat-absorbent, and more importantly, breathable. The extra-large wide brim of 4.7in and long neck flap of 10in provides full sun protection, covering not only your face but also your neck and ears. With ventilation meshes placed on both sides of the hat, you can keep cool and comfortable even on the warmest days.