The Rio Sofa Bed is a contemporary twist to a classic design without looking like a sofa bed. This modern sofa bed functions like a traditional sofa bed, but we use an air-over-coil that inflates over the mattress. The classic proportions of this sofa bed make it a beautiful addition to any room. Use either a regular mattress or an air mattress. Viesso offers multiple options in size, filling, fabric, legs, and mattress type.