Galaxy Core Prime Armband, HHI Sports Armband with Key Holder Pocket For Samsung Galaxy Core Prime BLACK. Armband Fits Small to Large Arm Sizes Adjustable Armband: fits small to large arms Washable material Built in key holder pocket Perfect companion while you run, ride and lift. Flexible lightweight adjustable wrist/armband. Adjustable fastener for one size fits all. Perforated design to ventilate moisture. Complete protection while inside the case jacket. Transparent screen shie