100% Polyester Button closure Hand Wash Only [ PREMIUM MATERIAL ] Womens ponytail sun hat is made of high quality polyester, quick-drying, waterproof, lightweight and comfortable to wear. The ponytail opening at the back of the hat is considerate design for women to pack up messy hair. [ FULL PROTECTION ] 3.7 inch Wide brim sun hat with neck flap and breathable face flap provides great UV protection to protect your face, ears and neck from harmful UV rays and annoying insects bites during outdoor activities. [ ONE SIZE FITS MOST ] Casual style suitable for women. Adjustable elastic buckle design, one size fits most adult head circumference: 22.6 - 23.8 inch. 10.5 inches wide neck protection on the back. [ ADJUSTABLE & BREATHABLE ] Adjustable chin cord for fixing the summer hat, especially in windy days. The built-in sweatband removes sweat from eyes and face. Two-side mesh vent keeps your head cool and breathable. [ LIGHTWEIGHT & PACKABLE ] Hat can be rolled up for easy carrying and absolutely save lots of space. Perfect for beach, pool, park, travel, fishing, gardening, hiking, camping, hunting or any outdoor sports and activities.