The Lens Case 200-400 for Canon EF 200-400mm f/4L IS USM Lens with Internal 1.4x Extender from Canon is a hard lens case, providing substantial protection against impact during shipping and travel. It is made to carry the Canon EF 200-400mm f/4L IS USM Lens and has a molded, padded interior specific to the shape and size of that lens. There are also spaces within the case for accessories. The exterior of the case features a sliding closure with key locks, rubber feet on the bottom and side of the case and fold-down handles on the top and side. A detachable shoulder strap is also included.