By using Japanese Asahi Tempered Glass 7H, you can be sure that your iPhone is protected from everyday scratches, smudges and heat. The tempered glass material is heat resistant, so you can go out in the sun and know that your phone won't overheat and turn off in the middle of an activity or an important text message. The screen protector is made of ultra-thin tempered glass, 0.3 mm thick to be precise.