This is a ultra-thin layer of chemically treated tempered glass with 2.5 D Edge Polish and 9H Hardness rating.
9H Hardness rating even exceeds the hardness of steel. This screen protector is made of Shatter-proof glass.
It has an Oleophobic coating that prevents scratches, smudges, fingerprints and other contaminants.
Once the glass is released on the phone, the silicone adhesive doesn't allow any bubble formation.
If the glass is removed, it doesn't damage the surface of the iPhone in any way.
It is reusable. Even the sharp objects like knives can't damage this tempered and processed shield.