Cellairis Frabel Trek Case for Apple iPhone 4 / 4S - Black / Blue Slim protective dual layer case with ridges that add extra grip. Constructed of a flexible Polycarbonate shell with a soft TPU Material Protects against accidental bumps, scuffs and scratches that may occur during everyday use. Complete access to all ports and functions This case is compatible with all carrier models of the iPhone 4 / 4S.