Sport Armband Case for Smartphones - Black with Grey Accents Made of lightweight, breathable and elastic neoprene material Fits devices with and without a case to ensure that the phone functions properly when placed inside the armband Double-folding strap fits arms with circumference of 9 to 17 inches Plastic cover protects your screen from scratching without sacrificing touchscreen sensitivity Sweat proof design will keep your device dry while you are active