1. for reducing wind noise during recording high-speed activities or in windy environments.2. Protecting your camera body from scratching, fingerprints, dirty etc.3. The nice cut out allows you easily to get access to all function port and buttons, battery doors, memory card, lens etc..4. Thin and lightweight, durable and washable, yet protective, snugly fits.5. Specifically designed for DJI Osmo Action sport camera.