Evutec Karbon Kozane S Sleek Carrying Case for Apple iPhone 5/5s - Retail Packaging - Kozane Red/Black Carbon S Series is a Super Slim, protective snap case with Visibly lined with official Kevlar Each Carbon S Series case is treated and polished with a specially formulated, five-layer Evutouch Coating for exceptionally easy-to-grip, scratch-resistant protection Kevlar is a woven material that is 5x stronger than steel at the same weight The case is only .7mm thin will not add any unnecessary bulk to your device Carbon S Series cases are designed without any metal substances which means you'll never have to worry about interference with your wireless signals