The hybrid mechanism: A mix of both of those sofa mechanisms, this requires pulling, folding, or sliding a frame out to transform the sofa into a mattress. For example, the bottom on the Article Nordby Pep Sofa Mattress slides out and even more cushions carry to create the sofa mattress https://bertiet776fxw4.ssnblog.com/30377752/the-greatest-guide-to-dreams-beds