Ambella Home Collection sleep sofas are custom built with premium bifold mechanisms of heavy duty angular and tubular steel. It is equipped with dual tubular legs for maximum support, a helically suspended polypropylene mattress deck which eliminates noisy and uncomfortable spring wire, and offset cross tubes in the upper sleeping area to avoid pinch points for a more enjoyable sleeping experience. The sleeper includes a premium 5 1/2" platinum innerspring Kingsdown mattress. Available only in queen size. Accommodates standard sheets.