POCKET SHUTTER
A shutter assembly includes a first and second shutter panel, where each panel includes a missile-repelling membrane panel, a frame having an elongated hollow body with inwardly disposed wall elements forming an inwardly facing U-shaped channel adapted to retain the membrane panel on at least two sides, and a membrane-retaining element separably attachable to the frame, allowing the membrane panel to be removed from the frame or secured within the frame.