Evolving from the simple Japanese floor mattress on a frame, today’s futons have gained popularity since their American introduction in the early 1970s. Anyone who’s tried to lift and maneuver a full-sized conventional hide-a-bed up a set of stairs or through a standard doorway will appreciate the ease with which a sofa-futon can be disassembled, carried, and moved. Sofa futons are also perfect for small living spaces. They come in several styles and sizes from, a single-bed lounger to king size. When choosing the sofa futon, figure out the size of the area available and compare it to the size of the sofa futon, determine how you’ll most likely use it most (as a bed or sofa), and the differences between the mattress options available.