Belkin Shield Shock Case for Apple iPhone 4 (Black Pearl) This unique two-piece design gives your iPhone an added layer of protection, and a better user experience. The contoured details give you enhanced grip and comfort for media-viewing, surfing and gaming. Start with a soft inner layer of silicone for shock-absorption. Then add an outer skeleton of lightweight, impact-resistant polycarbonate. The air-cushion design gives added drop-protection, without adding bulk.