The Lens Cover for Canon EF 300mm NO IS f/4 in Canon white from LensCoat is made from 100% closed-cell neoprene, offering protection from minor bumps and scratches. This cover allows you to blend in with your surroundings and is useful for nature, outdoor, and sports photography, as well as photojournalists. The hood piece is designed to slide easily over the barrel, providing waterproof protection. It also acts as a thermal barrier, protecting your hands from the cold lens surface in low temperatures. This version is all white and blends in well with snow or sand.