Abstract: An arch-shaped window treatment has a front and back and consists of a frame and a flexible material construction mounted thereon. The frame has a curved semi-rigid upper portion and a lower elongated piece. The curved portion and elongated piece are detachably connected at the respective ends thereof. A ruffle is formed from the flexible material construction and extends outwardly from the curved portion of the frame. Soft folds are created in the body portion of the flexible material construction which essentially fills the area within the frame. The folds are formed by virtue of hems of the flexible material construction being threaded over portions of the frame and the remaining excess fabric being further gathered on a cord which is tied at a central point along the straight portion of the frame.