100% Cotton and measure 20.5 inches by 42 inches. That's plenty of towel to soak up sweat through the entire game. These are new towels, not seconds or irregulars. The Gatorade logo can be seen on both sides of the towel. Towels feature antimicrobial treatment that keeps them fresh. Gatorade Anti Microbial treated sports towels are ideal for any athlete whether sopping up sweat after aerobics or during time outs at the big game. Towels do not require bleach to stay sanitary.