Lumia 550 Case, CoverON [HexaGuard Series] Slim Hybrid Hard Phone Cover Case for Microsoft Lumia 550 - Black CoverON [HexaGuard Series] protective hard hybrid case for the Microsoft Lumia 550 Hard polycarbonate outer layer combined with a soft flexible rubber silicone inner layer Enhanced "basketball" grip on the back Shock absorbing and protective yet thin and lightweight 90 day manufacturer warranty