Chooses high-grade Neoprene material manufacturing,so soft and elastic, wear-resisting, waterproof, prevent slippery.. Specification: 1 ... )Chooses high-grade Neoprene material manufacturing,so soft and elastic, wear-resisting, waterproof, prevent slippery, prevent collision, ... Special design, apply to i9300/i9100/htc...3)Elastic magic stick is convenient for adjustment cuff size4) ...