100% Cotton1. Material: 100% Cotton2. One adjustable Size: 57cm-60cm(7 1/8- 7 1/2). Please kindly check your head size before buy!3. Classic and Quality Design For Summer, Spring and Autumn.4. 4 colors is available, Black, Grey, Khaki, Army Green.5. With adjustable belt, can be adjusted according to head size, simple and convenient.