Another great way to protect your iPhone is with the invisibleSHIELD by Zagg. It doesn't offer any shock protection like the OtterBox but it won't add any bulk to your iPhone and it offers complete scratch protection for the screen and the chrome backing. The invisibleSHIELD is .2 millimeters thick. The invisibleSHIELD has its origins in the military, where it was used to protect high-speed helicopter blades from dust, dirt and debris. A friend of mine uses invisibleSHIELD and after an entire year of usage her iPhone remains scratchless.