Size: Hat Circumference: 56-60cm(adjustable) Hood Height: 11cm Brim: 7.5 cm Material: 99% Polyester mesh Gender: Unisex Soft mesh panels for better ventilation and keep you dry and snug. Applying Massive Durable Mesh Vent sets your head free from stuffiness. The adjustable strap is stretchy and has enough length. It can fit your head girth very well. You will not fill too tight or too loose. It can dry up very fast. Great for running, hiking, tennis, golfing, baseball, camping and any indoor or outdoor activities.