These case is only 0.5mm thick. It's not brittle and because of the thickness it's flexible in ultra frosted detail.
This case fit perfectly. I didn't expected to reach this fit but it's real!!
I tested it during 5 days know and I adopted it.
Just a recommandation if you buy it : clean it before to put it because of the wax remains.
In real, the case is more transparent than on the photos.
It's more than one week I have the case and it has not broken.
The case is well fit to the iphone and don't move at all.
It looks like to a polycarbonate case finally but more flexible.
Before to receive the case, I was thinking it will be brittle and it will not work. But it's working great!!