The Plank Firm is an all-foam mattress with a difference. It's extra firm and super supportive, with a flat surface that ...

But if you're a stomach sleeper, can a memory foam mattress provide the support you need? After all, if a mattress is too soft it can lead to aches and pains. There are many all-foam mattresses in ...

However, some all-foam mattresses, like the Plank Firm, contain high-density foams that offer an extra-firm feel. Is A Firm Mattress Better For Your Back? For back and stomach sleepers ...

The new Casper One is a more specialized mattress that's designed for back and stomach sleepers, and it has a less universally enjoyable feel. I think anyone looking for a firm foam mattress at ...