I was looking at screen protectors. There is tempered glass, Gorilla Glass, and sapphire. There is a difference between tempered glass and Gorilla Glass. Tempered glass is more impact-resistant, and Gorilla Glass is more scratch-resistant.
Sapphire is more scratch-resistant than glass screen protectors but not as good with impacts. The big problem with the Sapphire screen protectors is their cost. +/- $65 bucks is way too expensive, for what you pay you get very rudimentary installation jigs, and usually only one screen protector. Now that I have the installation jig figured out on the ESR it is now my choice going into the future. the ESR glass screen protector's ease of installation on my iPad Pro M4 13" is what caused me to get an ESR for the new iPhone.