100% polyesterHandwash only1. Superior Sun Protection: The material is UPF 50+ tested for true UV protection. Combined with the wide and long visor design, it covers your head, face, nose and front neck well. It can better protect you from sunburn. Great choice for everyday use and outdoor activities, especially bushwalking, fishing, running, hitchhiking, baseball, cycling, golf, tennis.2. Portable and quick drying: The crown is unstructured. Combined with the 3 panel bill design, this hat can be folded and placed in any pocket or bag. It can be carried around without taking up too much space. The hat also dries very quickly after washing. Both of these functions bring you a lot of convenience during use.3. Breathable and Waterproof: Moisture wicking keeps your head dry and comfortable. Additional mesh design enhances breathability. Its waterproof feature can help you temporarily if you get wet in the rain.4. COMFORTABLE AND ADJUSTABLE: The inner sweatband is very soft and comfortable. Back closure combined with elastic straps and snaps. Flexible shoulder straps fit better around your head circumference and give you a custom fit. You won't feel too tight or too loose. And you just need to adjust the size once and for all.5. One Size Fits All--Number Size: 6-3/4''-7-3/4'' Suitable for Head Circumference: 21.3-24"(54-62cm). The brim measures 3-5/8 inches long. Washing InstructionsHand wash only, not machine wash, do not bleach.