Sometimes we get questions that are pretty vague like, “What’s the best foam mattress?” Foam mattress could mean memory foam, natural latex foam, or even plain polyurethane foam. Usually what people mean when they ask, “What is the best foam mattress?” is one of three things: 1.) What is the best memory foam mattress? 2.) What is the best natural latex mattress? or 3.) What is the best foam mattress, natural latex or memory foam?