Tech21's Evo Mesh Case will absorb any force inflicted on your iPhone and repel it away from the device. Buy now at the Apple Online Store. The Tech21 Impact Tactical case protects your iPhone 5/5s in a ruggedized TPU formula that's lined with scientifically proven shock-absorbing D3O impact. Tech21's Patriot case is a ruggedised impact-protection design that safeguards the front and back of your iPhone 5/5s. It also provides acoustic vents that are.