The SkateBack for the iPhone 4/4s is made from the waste material created during the skateboard manufacturing process. It was created by Grove in collaboration with MapleXO. The SkateBack is available in 3 different colorways although no two are exactly alike. It easily attaches to your iPhone 4 or 4S via a peel-and-stick 3M adhesive.
You can purchase yours now from Grove for $50.