The Lens Cover for the Canon 400mm f/2.8 IS II Lens (Realtree Max5) from LensCoat covers the lens with a 100% closed-cell neoprene coat, offering protection from weather, bumps, jars and nicks. Available in different finishes, this protective coat will allow your lens to blend in with your surroundings making it useful for nature and outdoor photographers. It is also beneficial for sports shooters and photojournalists since it provides a thermal barrier from cold lens surfaces when shooting in lower temperatures.