Lumia 640 Case, CoverON [Slim Guard Series] Shockproof Protective Tough Phone Cover Case for Microsoft Lumia 640 - Teal & Black CoverON [Slim Guard Series] hybrid armor phone case for the Microsoft Lumia 640 Upgraded durable semi-hard semi-flexible TPU rubber inner layer Protective hard polycarbonate outer layer Slim fit and lightweight; modern design 90 Day warranty Included