The tempered glass by iNOS is a hardened glass, specially designed to cover and protect your mobile phone screen from scratches and other damages. It does not affect the screen's functionality. In case of a phone drop, it does not guarantee that the screen will not break along with it, but it provides additional protection. It is 2.5D, which means that its perimeter has rounded edges for a smoother touch feel during screen use. Useful for modern smartphones with curved screens.