SkyFold Mirage are frosted glass partitions that are hard, rigid and flat in its down position. When not in use, however, it folds vertically for storage in the ceiling. Developed as a modular system, it consists of a grid of rectangular acoustical panels. When not in use stores in the ceiling so it does not use valuable floor space, has no visible hinges and does not have any floor or wall tracks. SkyFold Mirage are the only frosted glass partitions that do not appear to be an operable wall.