We think it's a little bit of both.
Simply put, the Griffin Extreme Duty Case is the most protective case we've ever built.
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, with hinged plugs that seal the dock connector, headphone port, hold switch and volume controls. A detachable heavy-duty clip secures your iPhone to a belt or bag strap.
Survivor is independently tested and verified to meet or exceed environmental testing standards for blown rain, blown dust & grit, vibration, shock, temperature and humidity.