The WVD570-2 is the perfect size vacuum cleaner, big enough to do the job, wet or dry, but still very portable.The WVD570 range has a full Strutofoam construction. Structofoam is a material formulation embodying all the strength needed for bigger machines, yet without the weight penalty. It is really rugged. It doesn't dent, scratch, deteriorate and yet it is light in weight and resists all standard cleaning chemicals