Griffin Survivor Extreme-Duty Case Ridiculously over-engineered? Or the perfect case for your iPhone 4 no matter where you're headed? It's a little bit of both. Simply put, the Griffin Survivor Extreme-Duty Case is the most protective case ever built. Designed and independently tested to meet or exceed US Department of Defense Standard 810F and UK Department of Defense Standard 00-35, Griffin's Survivor Extreme-Duty Case is designed from the inside out to protect your iPhone from extreme conditions: dirt, sand, rain, shock, vibration, and a host of other environmental factors. Survivor is built on a shatter-resistant polycarbonate frame clad in rugged, shock absorbing silicone. A built-in screen protector seals your multi-touch display from the outside environment, while hinged plugs seal the dock connector, headphone port, hold switch, and volume controls.