They have taken a chassis composed of aerospace grade carbon fiber and CNC machined aluminum, and combined it with high impact TPU. The result is a case that's incredibly lightweight, yet rugged enough to meet military specification drop-test requirements. When it comes to a pairing of protection and style, this is the winning formula.
Element Case Formula - Back cover for cell phone - carbon fiber, machined aluminum, thermoplastic polyurethane (TPU) - gray, blue