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Plank Mattress Review

For sleepers who prefer an extra firm sleep surface, it’s hard to beat the Plank Firm Mattress. An all-foam mattress with a unique, flippable design, the Plank offers sleepers the choice between two firmness levels, firm and ultra firm. It’s extremely flat, and is designed to keep the spine in a neutral position, protecting the back, promoting good posture, and encouraging better blood flow. An optional cooling cover upgrade elevates the mattress’ comfort level for anyone who tends to sleep hot.

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Customer Reviews

What Customers are saying

David H.

I love love love this mattress. It is what I needed and have been looking for all these years. Having had it for over 6 months now without any felt loss in firmness I can say I am very pleased. I am a hot side sleeper with a bad back due to an injury sustained in my younger years and the extra firm side has negated my morning pain along with keeping things cool. Excellent.

Shari S.

This is one of the best investments I have ever made. I have wonderful sleep, it helps my husband's chronic back pain, and it is everything we hoped it would be. Would definitely recommend for anyone who prefers a firm mattress.

Jennifer H.

Shoulders and neck are feeling better after only a couple days.

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Mattress Authority Methodology

Don’t lose sleep over mattress shopping—our experts do all the work for you! Here’s how we approach our reviews:

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It Starts with Science

It Starts with Science

Before we make a recommendation, we always check what the science says. We look at credible studies and guidance from experts to identity the criteria we should use to evaluate every product.

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Then We Dive In

Then We Dive In

Armed with our criteria, we begin our comprehensive review of each mattress to determine how it stacks up. We note every detail—from the design and materials to the sizes, pricing and even the fine print.

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Next, We Sleep on It

Next, We Sleep on It

Our favorite part: The testing phase. We send our research experts on a mission to personally test out every mattress we review—to leave the bias behind and find out if they really live up to all the marketing hype.

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Finally, We See What Sleepers Are Saying

Finally, We See What Sleepers Are Saying

Customer reviews are a great resource for finding out how a mattress performs, especially long-term. We check out what customers are saying about each mattress, from the highlights to the pain points.