The hybrid system: A combination of the two sofa mechanisms, this consists of pulling, folding, or sliding a frame out to convert the sofa into a mattress. As an example, the bottom on the Posting Nordby Pep Sofa Mattress slides out plus more cushions carry to create the sofa bed https://kameronvqjas.ourcodeblog.com/31172610/not-known-details-about-4-poster-beds