It consists of thin silicone, which is nevertheless stable. The advantage is that the pressure point of the buttons is not lost, that the camera is now protected and that the iPhone is just a few millimeters thick.
The casing is very smart and protects the iPhone yet optimal because it is just a little over the screen so that it is protected and the edges can no longer break down thanks to shell.
Also nice is that you can still get included a screen protector.
A great product at a great price!