King Star Men Women Outdoor Sun Waterproof Quick-Drying Baseball Cap Hat MATERIAL:By applying super light and moisture wicking fabric and massive mesh design, it brings you a lot of cool and comfortable. FAST DRY& SUPERIOR SWEAT ABSORPTION:With quick drying feature of the fabric, the cap can dry out fast to enable you everyday use. Improved high quality soft sweat band is more functional and cozy during hot weather. ADJUSTABLE:Adjustable the back metal strap closure offers a custom fit.It is more durable than the plastic snap-back closure.By adjustment, this cap can fit most by 20-7/8" to22-13/16" head girth. please measure your head girth before purchasing especially your head girth is bigger or smaller than normal SIZE:For head girth:20-7/8-22-13/16(53cm-58cm).Cap depth:4'' (10cm) Bill length in the middle?3-1/8(8cm) OCCASION: Great for running, hiking, tennis,golfing,baseball, camping... It can be used all the year round,especially for hot days.