The YO™ sleeper sofa is a unique concept that uses no mechanical devices for mattress extraction. Three cleverly hidden High Resilience foams are neatly concealed to look like a singular seat cushion. Convenient handles on the underside of the cushion allows for simple mattress expansion, which reveals a hidden full size bed. Once the three-sectioned foam is completely unfolded, the backrest of the sofa acts as a privacy and sound barrier for guests.