The protective sleeve is perfect. It is dimensionally stable, protects even the most sensitive shiny polished edges of the iPhone and is a real value for bargains. All connections are easily accessible. In addition, the sleeve can be easily off and attach. Silicone has the property that it is a little looser with time and changes color slightly yellowish. However, this shell sitting due to the edge reinforcements fixed even after prolonged use. They should be now and then removed and cleaned, thus entering foreign body (the terminal entrances allow this; dust & Co.) with time not to scratch the unit. If you heed this, you will be amazed by the shell. I always order me two or three pieces on stock and exchange about every 1 1/2 months, the shell of. First, that is hygienic and secondly it also gets rid of the successive normal yellowing (which occurs even at 20/30 EUR cases) of a transparent silicone. Conclusion: a top product at an affordable price.