The Incase Systm Chisel for iPhone 5S is flexible and tough to the core. Engineered for outdoor toughness and flexible for whatever comes it's way. The concept is based on a proven solution: hard on the outside and soft on the inside. A full layer of PORON XRD Extreme Impact Protection along the back absorbs the impact drop after drop. Chisel combines the armored protection of an external hardshell with the flexible convenience of a rubber case. Easy on. Easy off. You immediately feel the protection wrap around your iPhone. Seamless flexible protection.