6-panel cap with structured front panels and curved brim that allow it to retain its shape over time Features laser-perforated side and rear panels for good ventilation that keeps you cool; Rated UPF 50+ fabric protects you from sunburn Crafted with water resistant and quick-drying properties along with the built-in soft moisture wicking sweatband to keep your head dry and comfortable One size fits most - Hook and loop closure at back for a custom fit for head size up to 23.6in Ideal for any outdoor activities and daily use; Easy care: hand wash, dry in shade The UVSAI unisex baseball cap features a durable and breathable design with performance water-resistant and UPF 50+ protection treatment - this is the perfect hat for running, cycling, tennis, golf, fishing, hiking, traveling as well as for everyday wear.