The LensCoat Nikon Lens Cover (Realtree Max5) is designed to fit a Nikon 800mm f/5.6 AIS manual focus lens. It covers the lens with a 100% closed-cell neoprene coat that protects the lens from bumps and scratches. Ideal for nature and outdoor photographers, and for sports shooters and photojournalists. It also provides a thermal barrier, protecting your hands from cold lenses in lower temperatures. The cover is waterproof, providing protection in inclement weather.