Yes, sleeper sofas are still a thing, but not how you might remember them; if a creaky contraption with lumpy springs comes to mind, then your idea of one is as dusty as the pull-out mattress in ...

between 3.5 and 5 inches, since they have to be folded into thirds to fit in the sofa’s frame. These can contain springs, memory foam, or a mix of the two. A foam-on-the-floor sleeper like the ...