Quilt is an oxymoron. it is a sheet of rigidized metal. thin metal with creases in its surface to render it more stiff. It is used in caravans, New York hot dog stands, trucks, Formula One and industrial kitchens.
This particular pattern gives it a quilted effect which moves it from the functional to something far more sensual and luxurious to wrap the radiator in.
It comes in a number of colours including bright stainless steel.