This baseball cap use quick dry polyester material with anti-UV coating which has passed UPF 50+ test. Combine with 3-panel bill design, the hat can be folded and fit into any pocket or pack. Extra mesh design enhance breathability. It is suitable for regular daily use and outdoor activities. The back closure is adjustable which offers a custom fit. Great for running, hiking, tennis, golfing, baseball, camping... It can be used all the year round, especially for hot days.