The zNitro 610373717179 Nitro Glass Screen Protector for Apple iPhone X/XS/11/11 Pro/11 Pro Max is a premium screen protector that’s Hammer Tested! This uniquely strong protector is made of highly engineered tempered glass that can handle anything you throw at it. Since it is glass, it doesn’t have any of the distortion or finger drag that is possible with other plastic based protectors. Product is not designed to be reused.