Octane Pure for iPhone 5/5s/SE Black. Incipioâs impact absorbing Octane⢠Pure case is precision engineered with a rigid Plextonium⢠polycarbonate back shell and a shock absorbent Flex2O⢠bumper. Finished with a crystal clear back and contrasting colorful bumper, the Octane⢠Pure Case takes protection to the next level.