100% Cotton If you have a BIG head: M/L suitable for 56-60cm, 7- 7 1/2, 22- 23.6inch; XL/XXL suitable for 61-64cm, 7 5/8- 8, 24- 25.2inch. Adjustable strap and buckle is for best desired fit. The hole at back also great for women or girls have ponytail. The crown deep is 3.5(9cm) and 2.4 (6cm) long bill/visor is a great alternative if you don’t like wide large brim, but still want to get a great sun protection in all year round except chilly winter during outdoor sports as hiking,fishing and travel. 100% high quality cotton fabric, metal eyelets air vent on both two sides of corp combines basic with the durability, ventilated breathablity and lightweight needed by spring, summer and fall season. Unisex Army Style: this classic cadet hat fits perfectly on Men, Women,and Teens(boys & girls). Because this military cap is made in our own factory of China, the price is extremely good.