The tempered glass by PanzerGlass is a hardened glass, specially designed to cover and protect your phone's screen from scratches and other damage. 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, however, it is an additional protection. With a special coating for antibacterial protection that kills 99.9% of bacteria and fungi. It is compatible with Galaxy Z Fold4.