The hybrid mechanism: A combination of the two sofa mechanisms, this consists of pulling, folding, or sliding a frame out to convert the sofa into a mattress. For example, the bottom on the Write-up Nordby Pep Sofa Mattress slides out and much more cushions elevate to create the sofa mattress https://jasperedqcs.bleepblogs.com/31550944/the-twin-sleeper-chair-beds-diaries