The Patrol Case incorporates the Tech21 Impact Shell with a ruggedised high grade polycarbonate outer casing for the iPhone 5. The outer casing provides the next level of protection that compliments the Impact Shell. The Patrol case is the perfect solution for those on the go where ever they maybe. D3O ® is a patented protective material that combines enhanced chemistry with product engineering to produce high performance shock absorption and impact protections solutions. The same revolutionary technology is used by the US Special Forces and Ministry of Defence as well as in Sports such as motorcycling and skiing.