Highly Durable Lens Cover from Camera Butter. The cover is designed for GoPro cameras (series 9-13) and replaces the original lens cover by "screwing it on". Camera Butter cover is made from 2mm Gorilla glass and anodized aircraft aluminum, making it one of the most durable covers for GoPro in the world. The Shock Mod cover features tabs on the top and bottom that are not visible in the footage but provide excellent protection against impact damage. The cover is equipped with a nano coating, which reduces glare, repels water and grease, and makes it easier to remove fingerprints.