The Lens Cap for the Insta360 ONE X2 securely slides right over the top of the camera and can easily be pulled off. It covers both the front and rear lenses to protect them from scratches and dirt when you have the camera in your pocket or bag. It's made of silicone and designed to the contours of the lenses. It also fits over the lenses if you have the optional ONE X2 lens guards already attached to the lenses.