This arm band provides excellent protection during sports such as running, biking, jogging, walking, working out etc. his fitness arm band is made of neoprene that's lightweight, washable and flexible at the same time so as to help you remove sweat ,One Extra Poket on the Band for your other belongings Waterproof and adjustable - this is an adjustable and water proof Velcro arm band that could fit the arms of the circumference of about 11-20 inches Wide compatibility - easy, hand band case is compatible for smartphones till 5.7 inches. Wrap it around your wrist or your arm and slide in your device, where it will stay safe and secure It has precision cut-outs for easy access to headphones ports and controls.