If you buy an Ektorp sofa or Poäng chair in Europe, some of the components may have once been inside an old mattress.

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 sofa bed. This is a great start.

Aside from this top-rated cozy memory foam number, we found two close runner-ups for the best sleeper sofa mattress.