100% Polyester. The Unisex Lightweight Packable Summer Bucket Hat is perfect for outdoor activities including hunting, fishing, camping, hiking, and lounging on the beach. It's foldable and compact for any sized backpack. Made with High Quality Polyester, it will help protect your skin against exposure to harmful UV rays. The brass tone ventilation eyelets on the crown of each hat provides constant cool airflow, allowing your head to breathe. Combining trendy styles with vibrant colors, this Unisex hat is a must have accessory for both men and women. Cool, lightweight and stylish. Ideal for casual wear or for out door use. Made in China. Original J & Jin hat. FITTING GUIDE: One size fits most.