The hybrid mechanism: A mix of equally sofa mechanisms, this will involve pulling, folding, or sliding a frame out to convert the sofa into a bed. For instance, the bottom of the Article Nordby Pep Sofa Bed slides out and a lot more cushions lift to create the sofa mattress https://sethwrjbt.thezenweb.com/new-step-by-step-map-for-doggy-steps-for-tall-beds-68990802