The hybrid system: A mix of the two sofa mechanisms, this includes pulling, folding, or sliding a frame out to transform the sofa into a bed. As an example, the bottom of the Article Nordby Pep Sofa Bed slides out and much more cushions lift to create the sofa mattress https://lorenzokcoyg.shotblogs.com/the-twin-sleeper-chair-beds-diaries-45091872