It keeps your screen safe from any sharp objects in your pocket or bag, such as keys, coins, etc. Anti-Microbial Treatment to Keep Screen Clean: Anti-microbial treatment on the top layer of the screen inhibits the growth of odor-causing bacteria. This coating reduces the growth of bacteria on your screen up to 99% keeping your phone safe and clean. No Bubble Installation: The zero-residue advanced adhesive ensures quick and easy application. Install the screen protector on your device with a one-push super easy installation process enhanced with full silicone adhesive and leaves no residue when removed. As this Promate Screen Protector is a premium glass screen protector and not a film, minimal bubbles are formed on application. To remove any bubbles, simply use a microfiber cloth and push them towards the edge of the device. 0.33mm Ultra-Thin Glass Preserves Touch Sensitivity: The high-quality 0.33mm glass of the Aegis tempered glass screen protector preserves touchscreen responsiveness and provides the same touch sensitivity experience as the device itself. The 0.33mm thickness adds an almost imperceptible amount of extra thickness to your phone, so you can be sure it is safe from harm while looking as good as new.