ONE SIZE FITS MOST: Ponytail sun hat head circumference is 22-23inch. Elastic buckle behind sun hats is for adjusting to fit your head size. The ponytail hole is specially designed for women. UPF50+: Outdoor sun hat is made of high-quality waterproof polyester, quick-drying, lightweight and breathable. Wide brim summer beach hat will provide the optimal protection against harmful UV rays and effectively protect your skin from sunshine. ADJUSTABLE BREATHABLE: Adjustable chin strap can effectively hold the hat in place on windy days. Built in sweatband removes sweat from eyes and face. Mesh vents on both sides keep your head cool and breathable. LIGHTWEIGHT FOLDABLE: It is packable, crushable and flexible without loosing its shape, so floppy bucket hat can be easily carried inside your handbag and save lots of space. Perfect outside gifts for your girlfriend, wife, mother, sister. WIDE BRIM DESIGN: Suitable for fishing, hiking, gardening, traveling, camping, boating, hunting, safari, beach, pool, doing yard work and field research or any other outdoor activity for all seasons use.