The Impact X and Gravity X screen is extremely ruggedized. The aluminum chassis, combined with 2 mm thick Gorilla glass makes it extremely strong. By comparison, an Iphone has just 0.3 mm glass! Bartec wanted to make it even stronger and Bartec has therefore introduced a screen protector which offers even more protection for the device. Combined with the protective cover it gives you the most ruggedized device ever! Works perfectly in combination with BPX-AC-PROTECTIVE-COVER-BLACK.