Sun UV Blocking: Material passed UPF 50+ test which is the highest UPF rating. Perfect for regular daily use and outdoor Sport such as walking, fishing, running, traveling, baseball, cycling, golf, tennis and so on; Breathable & Waterproof:Moisture absorption and sweat discharge fabric can keep your head dry and comfortable . Inner mesh design enhance breathability. It??s waterproof Material. can temporarily help you out if you are caught up with the small rain. Foldable & Quick dry: The cap crown is unstructured. Combine with 3-panel foldable bill design, Can be folded and fit into any pocket or pack. This hat can Dry out very fast after washing. Size adjustable: Rear strap has a brass buckle and ensures a perfect fit; adjust the girth for your head. It Fit for head circumference: about 21.6 – 24.5 inch.(we suggest buyer measure the head circumference before ordering to make sure it can fit well) The brim is 3.4 inch in length. Light Weight: about 60g.