The lenscoat lens cover set for the canon 1.4 and 2x extenders protect the extenders with a 100% closed cell neoprene coat, offering your valuable equipment some resilience to bumps, jars, scrapes and nicks. Easy to install and remove, leaving no residue on the lens, lenscoat lens covers are ideal for nature and outdoor photographers, where the realtree advantage max4 hd pattern helps break up the shape of your lens, making it less noticeable to wildlife and allowing you to blend in with your surroundings. Lens covers are also suited to sports shooters and photojournalists as the neoprene provides a thermal barrier, protecting your hands from cold lenses in lower temperatures. The lenscoat extender covers features small holes that line up with the red dot indicators to ensure that using and mounting the extenders isn't hindered in any way by having the lens cover attached.