Multi-foil insulation is made up of multi-layered reflective films, only a few microns thick. These layers, which are separated by wadding or foam are sewn together to form a thin insulating blanket. It is three to five times thinner than traditional thick insulation (including air spaces) but performs to the same level. These products are perfectly suitable for insulating residential, commercial and industrial buildings, in roofs, attics, walls and floors.