The Easycover Lens Cover for the Canon RF 800mm f/11 IS STM lens offers a customized fit, providing excellent protection for your lens when you're out in the field. The cover is made from flexible silicone, which wraps around the lens to protect it from environmental elements such as dirt, debris, and light bumps. The "Forrest Camo" pattern provides a natural, outdoorsy look, making it ideal for nature and wildlife photographers. The lens cover is easy to install and remove, and it does not interfere with the lens's performance, access to controls, or use of the lens hood.