Cornices are upholstery for your windows and are made with wood, batting and your choice of fabric.
A window cornice is a box-like wooden valance that is crafted from wood, batting and a fabric of your choice. It mounts to the wall above your window for a type of layering effect on a window. It can be paired with soft window treatments such as shades, blinds, drapes or curtains or you may use it alone for a more formal look to a room. Cornices work great in rooms that have little architectural interest to add stylish detailing to a room. They can make a room more elegant and finished in appearance, especially if you have no window trim or crown molding.