The hybrid system: A combination of both of those sofa mechanisms, this includes pulling, folding, or sliding a frame out to transform the sofa into a mattress. For example, the bottom of your Posting Nordby Pep Sofa Bed slides out and much more cushions elevate to create the sofa mattress https://cat-toys-toys64073.full-design.com/rumored-buzz-on-bunk-beds-with-a-queen-bottom-73634775