Nitro Glass is a premium tempered glass 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 its glass, it doesn't have any of the distortion or finger drag that is possible with other plastic based protectors. You can confidently expect the highest quality from all zNitro products. Quick Overview Tempered glass Virtually invisible Scratch resistant Hammer Tested™ No sticky residue if ever removed Additional Nitro Glass benefits: Nitro Glass is clear tempered glass and is virtually invisible on your screen. Nitro Glass is designed with our customers in mind. Therefore, it's easy to install. Nitro Glass offers supreme protection for your screen. Nitro Glass is backed a team of professionals who operate out of a high tech facility.