Of course, it is better to buy a sofa bed ready-made, having previously considered its main features. The sofa can be easily installed in a studio apartment, while it can fully replace several pieces of furniture at once; special small sofas can be a great sleeping place for children and teenagers. Some models have a sliding structure that can be enlarged. ; modern folding sofa beds are equipped with a comfortable orthopaedic mattress; the mechanism has a simple operation. Pull-out, sliding, folding models can be easily disassembled, even a child can cope with this task. In the bedroom and nursery, it can be used as a permanent sleeping place (to save space, the sofa will need to be folded every morning and laid out in the evening, but these actions quickly become a habit).