The GYM Old School Swim/Run Jockstrap with 1" Waistband is a classic 1" athletic supporter. The jockstrap is available in 2 colors: White, Black. Made with a 1" waistband and 1/2 inch leg straps. Composition: Pouch is 73% Nylon, 12% Rubber, 15% Cotton Waistband/Legstraps: Polyester and Rubber. PLEASE NOTE THE FOLLOWING REGARDING SIZING: Jockstraps fit tight. If you do not want a tight fit size up based on these dimensions. Before stretching the circumference of each waistband is approximately as follows: SMALL: 24", Medium: 27", Large: 30", XL: 33", 2XL: 36", 3XL: 38", 4XL: 40".