This LCD Screen Protector Ultra from Vello is a sheet of ultra-thin (0.02") optical glass used to safeguard the LCD monitor of the Canon 5D Mark II, 40D, and 50D. It easily adheres to the screen via static, without trapping air bubbles, and if removed, won't leave a sticky residue behind. Multiple layers of protective material shield your display from dirt, scratches, sweat, smears, and light impact. The shatter-proof glass blocks UV rays while allowing visible light in. It can be easily cleaned using the supplied microfiber cloth and wet wipe.