Quick install design Made with 100% Bpa lead phthalates free TPU Unique rib structure to reduce impact Protected volume and power buttons Screen edge protection Achieving distinction through design, the iSkin Exo for GS4 has a bold, brawny, yet sophisticated appearance. Offering effective protection to the delicate design og the GS4, its shock-absorbing rib structure protects vital areas of the new device, inclining the edges, and is designed to disperse impact energy.