100% Polyester Drawstring closure ?One Size Fit Most: Brim width of this sun hat is 3 3/8 inches, inside circumference measures about 23 inches, but an internal adjustable drawstring ties to fit a variety of head shapes and sizes, for adults and teens, not include babies. ?Wind and Sun Protection: This sun protection hat is equipped with an adjustable rope buckle, this adjustable chin drawstring can hold the hat in place on windy days, very practical and classic decoration. UPF 50+ excellent sun protection, keeps the sun from your face and neck and offers great protection from the damaging rays. ?Foldable Easy to Carry: Fold-up brim material can be worn folded up or down in various cute styles while still maintaining its shape, also it can be easily carried inside your bags. You can even put it in your POCKETS. ?Fine Fabrics and Workmanship: 100% high quality comfy polyester and stitching process. The top of the quick-dry hat is made of breathable nylon mesh, which is beautiful, comfortable and not stuffy, and the inner cotton sweatband has a sweat-absorbing function. ?Applicable Occasions: Perfect choices for beach, pool, park, camping, hiking, fishing, race day events, tourism, gardening or any outdoor sports and activities.