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Ultra-firm sleep surface protects the back & promotes good posture
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Can be heavy to transport
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Flippable design enables sleepers to choice their ideal firmness level
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May be too firm for some sleepers
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Endorsed by the American Chiropractic Association (ACA)
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Optional cooling cover for enhanced temperature control
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Superior edge support prevents sagging
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Made in the U.S.
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120-night sleep trial
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10-year warranty
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Free shipping and returns; ships in three to seven business days
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- Firm, flat, most supportive sleep
- Flippable design for ideal firmness levels
- Delivered in a box for easy transportation
- Free Shipping & 10 Year Warranty
- 120 Night Sleep Trial
Fall Sale: 25% Off Sitewide
First Impressions
Firmness
Firm side ranges between 7.5 to 9; ultra-firm side ranges between 9.5 to 10.5.
Sizes
Twin, Twin XL, Full, Queen, King, Cal King, Split Cal King, Short Full, Short Queen, Olympic Queen, Short King, RV King (three sizes)
Height
11.75 inches
Materials
All-foam (hybrid models also available)
Design
Dual-sided design with two firmness options, optional cooling cover
Trial Period
120 nights
Warranty
10 years
Shipping
Free shipping in three to seven days
Returns
Free within trial period
Who It's Best For
We recommend the Plank Firm Mattress for the following sleeper types:
Those with Back Pain & Musculoskeletal Disorders
Unlike soft mattresses, which tend to sink in, a firm mattress offers proper support for your spine, relieving pressure on your shoulders, neck and hips. This is especially beneficial if you suffer from back pain or have a musculoskeletal disorder like arthritis or osteoporosis.
Back, Stomach & Heavy Sleepers
If you sleep on your back or stomach, a firmer mattress like the Plank Firm can help ensure your spine stays in correct alignment. The Plank Firm is also a great option for heavier sleepers—experts recommend a medium-firm to firm mattress for back and side sleepers over 230 pounds.
Warm Sleepers
Firmer mattresses like the Plank Firm tend to absorb less body heat than soft mattresses, providing a cool surface even for those who sleep hot. The mattress also comes with an optional cooling cover that elevates its temperature-regulating properties.
Ordering Information
The best way to purchase a Plank Firm Mattress is to order it directly from the brand’s website. This ensures you’ll be able to take advantage of their frequent promotions as well as their generous sleep trial and warranty.
Materials & Design
Here’s a look at what’s inside the Plank Firm Mattress:
- Optional Cooling Cover: Featuring the brand’s proprietary GlacioTex™ technology, this optional upgrade delivers maximum cooling on contact.
- Quilted Top Layer (.75-inch): This layer creates minimal loft for a traditional firm sleep experience.
- High-Density Support Foam (six inches): A high-density base foam ensures durability and stability.
- Comfort Foam (two inches): Featuring the brand’s firmest TitanFlex™ comfort foam, this layer adds deep compression support throughout the mattress.
- Quilted Bottom Layer (.75-inch): This layer is designed to include zero loft, providing an ultra-firm sleep surface when the mattress is flipped.
Pricing
The price you’ll pay for a Plank mattress depends on the size you select and whether you opt to upgrade to their cooling cover. A Queen-sized Plank Firm mattress without the upgraded cover has a base price of just over $1,300. However, Plank frequently runs promotions, and at the time of this writing, the same size retails for just under $1,000.
Plank Firm Mattress vs. the Competition
Here’s a look at how the Plank Firm Mattress stacks up against the competition:
Extra firm and flat dual-sided mattress with choice of firmness
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Endorsed by the American Chiropractic Association
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10+ sizes
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90+ night sleep trial
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10+ year warranty
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Free shipping
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The Bottom Line
The Plank Firm Mattress sets itself apart with a dual-sided design that allows sleepers to choose from two firmness levels, firm and ultra firm. It is endorsed by the American Chiropractic Association, and promotes proper spinal alignment and blood flow. Its optional cooling cover is appealing to sleepers who tend to sleep hot, and who appreciate a more customized sleep experience. And, with a 90-night sleep trial, a 10-year warranty, plus free shipping and returns, customers can rest easy knowing they won’t be stuck if the mattress isn’t a fit.
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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.