This very sleek nylon rain cover will keep your camera and long lenses dry in rainy or snowy weather. It is comfortable to work under and will help to keep your own head dry in wet and nasty weather. The hassle free tie down system allows you to easily adjust the cover to fit your camera and lens combination. This is ideally suited for 300mm F/2.8 and larger lenses. This is not designed for 70-200 or 300 F4 lenses.