2Layer Dual Hybrid Slim Case Cover (shockproof) For Kyocera Hydro Wave C6740 C6740N / AT&T Kyocera Hydro Air C6745 Phone (Black Carbon Fiber) Premium 2layer dual hybrid slim case. Pre-cut to give full access to all ports, buttons, and features. Material: Poly-carbonate (exterior layer) and rugged soft silicone (interior layer). Anti skid design (prevent fall down) and shockproof. Easy self-installation (no tool required). Just snap-on top of your phone and no need to remove any part of your phone.