Tunewear Metal Bumper Case for iPhone 5 - 1 Pack - Retail Packaging - Silver the inner DVTPC frame (Dynamically Vulcanized Thermoplastic Elastomer Composite), is a specially developed method and material for TUNEWEAR a fully molded ZINC ALLOY frame adds shock absorbing protection to all four sides and extends this protection to the front and the back of the phone does not add extra thickness to your phone yet protects it from surface scratches and high gravity drops leaves iPhone 5 fully visible & usable