One Tough Shield &reg; 3-Layer Hybrid Design phone Case (Grey/Black) for Apple iPhone 4 4s - (Volleyball) Compatible with: Apple iPhone 4 4S 3-Layer casing. FRONT and BACK Hard Cover combined with Soft Silicone Case. The 2 outer layers are crafted out of high quality hard plastic. The inner piece is made with a durable silicone material. Shock Absorbing. phone NOT included.