The hybrid mechanism: A combination of both of those sofa mechanisms, this entails pulling, folding, or sliding a frame out to convert the sofa into a mattress. For example, the bottom with the Post Nordby Pep Sofa Mattress slides out and more cushions raise to create the sofa mattress surface https://dining-room-chairs-ikea80877.jaiblogs.com/58028034/the-all-size-beds-diaries