The low thickness, the sheath also contributes to not too much. The cut-outs for camera and speaker are in the right places and the operation remains entirely! The display is protected by the edge of one millimeter on the sides from scratches, so you can put the device without problems on the display side.
The special feature of the envelope are the nubs on the inside. This will better protect the device from bumps.
But whether this really works, I do not want to try;)
By the knobs a little air can at the back of the iPhone so do not circulate these too hot under the cover.
The synthetic material which is really crystal clear and has no yellow tinge, perfect for those who want to renounce neither to the design of Apple still on device protection.