HTC One (M8) Armband, HHI M8 Sports Armband with Key Holder Pocket For HTC One (M8) GRAY. HHI M8 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 with transparent screen shield.