The Helmet Diamond Glass 4D is a tempered glass screen protector designed specifically for the Samsung Galaxy A21s. Its 4D technology ensures full edge-to-edge coverage, providing a seamless fit that adheres securely to the front screen while maintaining an ultra-thin profile. This protective layer shields your device from daily wear by resisting scratches, dust, and shocks from accidental impacts. To keep the display clear, it features an anti-fingerprint and anti-grease coating, which makes it easier for you to maintain a clean screen during regular use.