EVUTEC Karbon SP Case for Apple iPhone 5/5s in Kozane (Red/Black) The Carbon Kozane SP Series Case is a sleek 2 piece shockproof snap cases specially made to fit the iPhone 5/5s. The 0.7mm thin outer shell contains Kevlar fibers and combines with a 1.3mm thin inner TPU layer for 2mm of thinness. Made From Same Material as Bullet Proof Vest The Kevlar fibers make it 5 times stronger than steel at the same weight and will not block your GPS, Wi-Fi or cellular signal. Each case is sprayed and polished five times with our special formulated Evutouch Coating to help protect against scratching.