The hybrid system: A mix of both of those sofa mechanisms, this will involve pulling, folding, or sliding a frame out to transform the sofa into a mattress. For example, the bottom on the Post Nordby Pep Sofa Mattress slides out and more cushions raise to create the sofa bed https://charlievsmdv.aioblogs.com/84449583/the-twin-sleeper-chair-beds-diaries