ITEM NAME:2PCS New Square Camera Diving Lens Filter Kit Fit for GoPro - Yellow+Red Description: Specially design for Gopro Hero 5/6/7. The UV filter is used to reduce UV rays from outside to the lens. UV filters are commonly used to help protect the surface of the lens from scratches, smudges, dirt and other hazards. The CPL filter provide color and contrast enhancement. Polarizers reduce glare from water, glass, or any non-metallic surface. You can also use a polarizer filter to darken blue skies. The red filter is necessary to restore the red light absorbed by water in natural light, mostly used in large blue sea water, less algae, good water.Specially design for Gopro Hero 5/6/7. The UV filter is used to reduce UV rays from outside to the lens. UV filters are commonly used to help protect the surface of the lens from scratches, smudges, dirt and other hazards.