GGS LCD Optical Glass Screen Protector for Canon EOS 1000d It is rigid and made of optical glass material, which achieves more than 9% of transmittance (higher than plastic LCD screen protectors), thus making the LCD screen clear. Only .5mm thick with 6 layers of coatings and UV Protection. Optical glass strengthened through special crafting process. Prevent scratches, collisions and moderate impact to the LCD screen. The protector is reusable.