The hybrid system: A mix of both equally sofa mechanisms, this requires pulling, folding, or sliding a frame out to convert the sofa into a mattress. One example is, the bottom on the Write-up Nordby Pep Sofa Bed slides out and more cushions raise to create the sofa bed surface. https://dassolutions79867.total-blog.com/5-simple-techniques-for-best-raised-beds-56375062