High Quality Premium Tempered Glass Film Screen Protector for iPhone 4 4S Window display, high sensitivity and comfortable touch feeling. Anti-Fingerprint and Oleophobic Coated Ultra Slim Thickness Slim chemical treatment processed tempered glass A.S.F: Anti-shattered film (highly silicone coated). If the tempered glass is broken, it will breaks into small pieces that are not sharp, making it safer than other glass products.