A twin metal bed frame that folds down to 30 in long by 6.5 in wide by 39.5 in tall, which is the difference between a spare bed that lives in a cupboard and one that has to occupy a room permanently. Folded, it slides behind a door or under another bed. Set up, it is a proper platform bed rather than a camp cot: 76 by 39.5 in on the floor with a 75 by 39 in sleeping surface, standing 23.5 in tall on a metal structure with powder-coated slats, extra middle metal legs, and a triangular bracing arrangement that keeps the frame from racking sideways. The headboard and footboard are arched rather than square-topped, so the bed reads as furniture instead of hardware, and the 16 in footboard gives the end of the bed a finish. Corners are rounded, which matters on a metal frame that people pass in the dark. The platform is embedded, so the mattress drops into the frame and stays there rather than sliding off toward one side, and the slats support an 8 to 12 in mattress directly with no box spring involved. Under the frame there is 9 in of clearance for shoes, a storage box, or a sweeper to pass through. Because the whole thing weighs only 24.5 lbs, one person can carry it, which suits bedrooms, living rooms, guest rooms, and apartments where the bed has to move. Assembly is required.