The Firmest All-Foam Mattress
Ships in 3-7 business days
The Firmest All-Foam Mattress
Limited Lifetime Warranty
120 Night Trial
Free Shipping
10" Tall, Flippable, All-Foam Design
12" Tall, Flippable, Hybrid Design with Extra Firm Coils
HSA/FSA eligible for qualified customers
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Experience a new level of sleep quality with mattresses that are specifically designed to offer the firmest support on the market.
No Support
Multiple layers of high density supportive foam and edge to edge support
Back Pain
Endorsed by the American Chiropractic Association for it's firm benefits
Sleeping Hot
Breathable materials with cooling gel and GlacioTex™ Cooling Cover
Limited Comfort Options
Flippable mattresses with 2 comfort options (firm or extra-firm)
The Firmest All-Foam Mattress
The Firmest Hybrid Mattress
120-Night Trial
We are committed to helping you find your perfect mattress. Enjoy our 120-night comfort trial to see if our mattress is right for you.
Free Shipping and a Limited Lifetime Warranty
Free shipping is always standard with your mattress order. Rest easy with our limited lifetime warranty.
Bed-In-A-Box Delivery
We deliver your mattress in a box, shipped directly to your door. Set-up is easy: click here to see the best way ever to open and decompress your mattress.
Overall rating: 4.6703563 / 5 from 4156 reviews.
The Plank Firm mattress is highly praised for its excellent support, quality, and sleep experience. Customers appreciate its firmness and the reduction in back pain, though some find the side too soft. Delivery is reported to be fast and efficient.
Review topics: [softness, size, instructions, smell, frame, fit, weight, firmness, support, comfort, quality, issues, material, delivery, customer service, handles, looks, feel, cover, mattress, value, box, husband, sleep, packaging, edges, wife, works, improvement, surface].
"It's been only 2 months we have been using new mattress. I want to understand is there any weight limit for the mattress. I weight 290 lbs and the side which I use it has softened out. I can feel with hand it goes down. Can someone explain me what is happening. I saw the rating on Internet and I understood plank mattress is the firmest and highly rated. I am rather shocked to see this. I was hoping it would have worked for 10 years."
"We like it. I wish it had handles sewn into the side so that it can be more easily moved around. I'm 230 pounds and my side of the bed has definitely sunk in compared to my wife's side or the middle of the bed. It says the bed support 600 pounds but I guess they mean 200 in the sides and middle each. My wife really loves it and we couldn't find anything close to matching the level of firmness. We need to do a better job of rotating it or switching sides when we sleep."
"I'm very happy with my plank firm mattress. I'be only had it a few weeks, but it's so comfortable and I'm sleeping great. Didn't realize how sagging my prior dorm mattress really was after 10 yrs until I got this one. As long as it holds up and doesn't crater, I'll be a happy customer! Well worth the money. . . and got it on the Memorial Day 30% off sale, so that was a bonus!"
"Unbelievable! We are on bed number 3 for the past 2years. I can finally have a good nights sleep. It only took 20 years of being in constant pain. Every bed swore how amazing the quality and firmness would be, yeah, never happened. We paid for the name, we paid in pain. Until our son found you!"
"This is truly a firm mattress, which is what I have been looking for. I am using the firm side, which suits me. I have not tried the medium firm side. I was kept up to date after I ordered about shipping a delivery. I did not experience any off gassing from this mattress. I would not hesitate to buy another one in the future."
"Just got the product and have only slept one night on it. It is very firm which I’m not typically used to, but I did seem to get a good nights sleep so maybe I will get used to it. I like the fact that you can flip the mattress over to get a little bit of a less firm feel. I’ll try that."
"Partner sleeps on his stomach. Couldn’t find a firm enough mattress. Couldn’t convince him to try Plank until two mattresses later. One mattress was stuffed even further on his side by manufacturer and a bear to move. Finally agreed to try ordering Plank online with tryout guarantee. One split Cal king, it’s a 10” mattress. My side is about 13” high. Solution: Invested in a 4 square split wood Cal king bunkie board (under $200) and set it up all on his side. Here we are. Bed is now even, firmly supported and quiet. He’s extremely happy. He loves the mattress!"
"I LOVE my PLANK! I was sleeping in 2 different places for a couple of months after I got married and it proved to me the Plank was the right decision. The days I slept on my old mattress was definitely impacting my hips and back. My old mat wasn’t even 3 yrs old yet and was more expensive than the Plank! I feel like I’m getting better quality sleep and I wake up with way fewer aches than before."
"Always wary about buying a mattress online, but I am so happy with this purchase. Very firm and comfortable bed. Purchased this for our RV and it’s as comfortable as our bed at home."
"Most mattresses I find sink after the first few nights. This one took one to two weeks before getting soft. It's still firmer than the other mattresses I've tried. If it holds up for the next few months, I'll keep it. If not, it's going back. And the mattress is four-star but three-star overall since they don't have a real free sleep trial. They have a restocking fee. Companies that do this just need to be more honest in their advertising. I bought a nectar a while back because you could return it completely free during the sleep trial. I never needed to return it. They even stuck to their warranty and sent a new one when it got too soft. Unfortunately, they don't make a mattress firm enough, so I'm trying these other companies. These other companies just don't seem to have the same standards."
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