Metal pull-out mattresses are typically thinner, 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 ...

A sleeper-sofa mattress upgrade: Milliard 4.5-inch Memory Foam Replacement Mattress It doesn’t take much to improve upon the busted, old mattress—or the disappointing new one—lurking in your ...

Below, shop our top picks for the best sleeper sofa mattresses. Amazon What we like: Worth noting: With more than 5,000 reviews and a 4.5-star rating, the Milliard memory foam mattress is our ...