Panegy Camo Boonie Hats Sun Caps UPF 50+ Fishing Hiking Hunting Hats Aussie Caps polyester Diameter(inch): 7.5 inner, 13.5 outer.Dual pull strings, one for tightening it around the top of your head and one for your neck to keep it from blowing away.Adjustable drawstring for fixing the hat, especially in windy days.Four ventilation holes keep the hat ventilate. The cap is made of 100% polyester and the material is soft.UPF 50+ excellent sun protection, Anti-UV and Vented make the hat all-day comfortable protect your face One Size Fits Most, With Chin Cord for Comfortable Fit.Side snaps give this cap an authentic Aussie look. The wider brim provides better protection than other caps which have only a bill in the front. Nice size brim to cover face and neck and the mesh part will keep your head from getting too hot. Perfect packable for traveling, hiking, gardening, fishig and other outdoor activities.100% Satisfaction Guaranteed After-sale Service - Any problems, DO NOT hesitate to contact us, we will try our best to meet your expectation.