The hybrid system: A mix of the two sofa mechanisms, this requires pulling, folding, or sliding a frame out to transform the sofa into a bed. One example is, the bottom on the Article Nordby Pep Sofa Mattress slides out plus much more cushions lift to create the sofa mattress https://alexisuqitg.blog-kids.com/31211262/5-simple-statements-about-x-rocker-beds-explained