VELUX darkening energy curtain is more than a curtain. It's the only curtain from VELUX, which gives a darkening effect, insulation, view and light - a flexible curtain. We call it "floating", since the manual curtain is neither attached to the top or bottom and can thus be placed freely in the window. VELUX darkening energy curtain holds the decorative qualities of the plush curtain, but as we add a special aluminum backing, it also has an outstanding insulating effect. This allows you to achieve both a flexible shield and a comfortable indoor climate and keep warm in the winter. In other words, it is a design-oriented curtain and a good way to increase your home's energy balance. Very suitable for bedrooms.