For Insta360 GO 3S STARTRC CPL Camera Lens Filter (Black Red)Features 1. Customized CPL filter for insta360 GO 3S, multi layer coating, waterproof, scratch proof, dust proof, oil proof, protect your GO 3S lens from all round damage. It can eliminate reflections from non metallic surfaces such as glass and water when shooting, and is often used to shoot scenery behind glass, clear and transparent water, and underwater creatures, etc. It also enhances color and contrast, making the sky bluer and the water