100% Polyester Easy to pack and rollable to your bag and pocket. It is great for the vacation , trip , outdoor activities , street strolling for the sun and rain protection headwear. Size: One size fits most (head circumference is 56-58cm=22.0"-22.8") Two side is wearable which means you will have two types of hat at the same time Made of lightweight fabric provides you sun protection while the sun is beating down and keep you cool and comfortableProducts from Chunchuan's store Unisex Print Double-side-wear Reversible Bucket Hat