Case Mate Tank case brings an extreme approach to defending the iPhone 4 / 4S with a rugged case that completely protects the iPhone 4 / iPhone 4S from screen to back. Modeled after motorcycle helmet engineering, Tank is designed with a hard, impact resistant exterior and a shock absorbing interior. A shatter resistant, polycarbonate hard shell combines with the thick, silicone cushioned interior. The retractable screen shields from impacts, cracking and condensation, fully protecting the iPhone screen. The Tank exterior is made of a premium, soft grip texture that slides easily in and out of your pockets. The Tank tests number one in impact resistance against the leading brand, and meets or exceeds US military standards. The Case Mate Tank case‘s polycarbonate exterior is 2.5 times more impact resistant than the leading branded cases.