65% Cotton, 35% Polyester SUN PROTECTION & WIDE BRIM - The hats sun protective rating is up to UPF 50+, with 3.74 inch enlarged wide brim BREATHABLE & COOLING - The lining is made of cotton and polyester, with vented mesh windows on both sides. The breathable sunhat can keep your head ventilated and cool, the built-in moisture wicking headband maintains breathability and moisture absorption ADJUSTABLE & FITTING - The hat is designed with elastic draw straps, which can fit circumference 22-23.2 inches（7 3/8）. The chin string is adjustable WATERREPELLENT& QUICK DRYING - Made of 100% ripstop nylon material, with a water-repellent design FOLDABLE & LIGHTWEIGHT - Makes the hat easy to use