If you sleep on your back or stomach, an extra-firm mattress might be the best for you. Here are the best extra-firm mattresses on the market, tested by us.If you sleep on your back or stomach, an extra-firm mattress might be the best for you. Here are the best extra-firm mattresses on the market, tested by us. CNET
Best Extra-Firm Mattress of 2024 – CNET
