Polyester,Mesh Material: 100% polyester One adjustable size: 57cm-60cm (7 1/8- 7 1/2). Please kindly check your head size before you buy Lightweight and breathable, side with adjustable belt Classic 11 colors are available: Black, Burgundy, Coffee, Green, Grey, Khaki, Navy, Red, Royal Blue, White, Yellow Ideal for summer and hot weather VOBOOM Men Breathable Mesh Summer Hat Adjustable Newsboy Beret Ivy Cap Cabbie Flat Cap - B5JWM8FSR