Octane Pure for iPhone 6/6s Clear/Gray. Incipioâs impact absorbing Octane(TM) Pure case is precision engineered with a rigid Plextonium(TM) polycarbonate back shell and a shock absorbent Flex2O(TM) bumper. Specially designed to be completely Clear, the Octane(TM) Pure case delivers long-lasting, durable protection in a slim shape without having to cover up your device.