Cascades are a type of window curtain that hangs on both sides of the window. Cascades also have a variety of motifs and lengths, some are the same length or one side is longer. Cascades usually don’t separate from the swag, the wavy top that forms a semicircle. The two combine to form a graceful and charming window curtain. Cascades and swags are suitable for installation in reading rooms or private rooms.