Screen Protector for iPhone - Quad Lock® PROTECTIVE DESIGN Using Tempered Glass, you can be confident that your iPhone will be protected from everyday scratches, smudging and heat. HEAT RESISTANT The tempered glass material is designed to resist heat so you can go out in the sun knowing that your phone won't overheat and switch off in middle of an activity or important text message. ULTRA THIN The screen protector is designed using an ultra thin tempered glass material, 0.3mm thick to be exact. So thin in fact, you will barely notice it's there. Please Note: Use of a screen protector in combination with the Poncho may affect touch screen usability