Trolect (TM) Iphone Armband Case for Iphone 5, iPhone 5S, iPhone 5C, iPhone 4, iPhone 4S for running or exercise (Black) Sweatproof and water resistant for full protection of your iPhone Adjustable velcro strap enables great fit for most people, big or small. (fits arm circumference of approx 7-17 inches) Fits iPhone 4, 4S, 5, 5S, and 5C. Easily fit your iPhone into the armband to allow immediate workout or exercise Made of strong neoprene and nylon while allowing full access to the touch screen and all of the phone's buttons and ports