The Tech21 Patrol Case is the most advanced 3-layer impact protection case yet. When dropped, the Impact Band inside helps absorb impact and then dissipates the shock force away from your phone. 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.