A tempered glass protector is a multi-layered screen protector. It has a bottom layer of absorbent silicon, PET film and an optically clear adhesive tempered glass and oleophobic coating in that order. Tempered glass is up to five times stronger than normal glass.
WHAT DOES IT DO FOR MY PHONE Tempered glass is more heat resistant than regular glass, meaning your phone is less likely to be damaged by heat. Plastic screen protectors are much more likely to be scratched than tempered glass protectors, which are up to five times as thick than standard plastic protectors. The smoothness and clarity of the tempered glass makes the screen protector feel more like your actual smart phone screen than a plastic screen cover would. Generally, tempered glass screen protectors are generally easier to put on your phone than plastic screen protectors.
IS IT WORTH IT In short: YES. This answer comes not only from research, but from my own personal experience. I dropped my phone down multiple brick stairs and when I picked it up, I was horrified to see what looked like a cracked screen. Low and behold, I took off my tempered glass screen cover – NOT A SCRATCH on my screen. I immediately went out and bought another one. I cannot say I’ve had the same positive experiences with standard plastic phone covers.