With a Gear4 Battersea back cover, the back of your Apple iPhone X / Xs is protected against scratches, drops and bumps. The case has an inner layer of D3O. This material consists of particles that clump together and harden if you drop the case or hit something. The particles naturally separate again after the moment of impact. The D3O material offers incredibly good protection while the case is relatively thin. The back cover has cut-outs on the side, bottom and top, making the buttons and inputs of your smartphone easy to use.