Griffin Technology has debuted the Survivor Custom, the company’s most rugged iPhone 4/4S case. It’s available with new mix-and-match color options for the first time exclusively at for US$49.99.

Each of the Survivor’s three components — silicone wrap, polycarbonate inner shell and belt clip — is customizable across a spectrum of colors. Tested to meet or exceed US Department of Defense Standards, Survivor is proven to protect iPhones from the most extreme conditions, including dirt, sand, rain, shock, vibration, temperature, humidity and a variety of other environmental factors, according to the folks at Griffin.

The case is built on a shatter-resistant polycarbonate frame, clad in shock-absorbing silicone. A built-in screen protector seals the iPhone’s multi-touch display from the outside environment, with hinged plugs that seal the dock connector, headphone port, hold switch and volume controls. A detachable heavy-duty clip secures the case to a belt or bag strap