Two things can be true at once: Sleeper sofas are a feat of engineering, and they can be the bane of your existence. It’s a marvel to fit a frame and mattress for a bulky piece of furniture ...

Even though it's hiding a full queen-sized mattress inside, the sofa is impressively compact—the most functional option for ...

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 ...