100% Cotton. The Hat Height is 8.5 cm. The trench is 6.5 cm. The standard size of our hat is 57 cm. There is a lining and a sweatband on the inside of the hat. The height of the hat is 8.5 cm. The trench is 6.5 cm. It's made of 100% cotton fabric. It doesn't make you sweat. Sample Size: S/36/1; Model's Measurements: Height: 170, Bust: 80, Waist: 58, Hips: 89, Size: S/36/ 1; During Studio Shooting, the Colors May Vary Due to Differences in Light.