Main Features
After our research and review, we believe the following are the main features of the Plank Firm Natural mattress:
- Customizable firmness levels
- 100% organic cotton and wool cover
- Sustainably sourced Talalay latex
- Open cell cooling technology
- Individually wrapped coils
- Higher-gauge coils for edge support
- 120-night sleep trial
- Limited lifetime warranty
 

 
How the Plank Firm Natural Mattress is Made
True to its name, the Plank Firm Natural mattress is firm on one side and medium-firm on the other. It’s made from natural, sustainably sourced materials. Read the following sections for details about construction.
Organic Cotton and Wool Cover
What better way to start than a 100% organic cotton and wool cover? This 0.75-inch quilted layer is slightly stretchy and delightfully soft so it feels comfortable next to your skin. The breathable, moisture-wicking fabric retains its shape and helps keep you cool and dry. As a bonus, the cotton and wool are sustainably sourced and certified according to the Global Organic Textile Standard (GOTS).
Talalay Latex Firm Side
Next is a responsive, 1.5-inch layer made of 100% natural Talalay latex. If you prefer a firm feel, you’ll want to sleep on the firm side of the Plank Firm Natural mattress. The Talalay latex is certified by the Forest Stewardship Council (FSC), which means that it is obtained from a sustainably managed forest.
Individually Encased Coils
At the core of this hybrid mattress, you’ll find an 8-inch layer of individually wrapped TitanCaliber coils. Each coil is wrapped in OEKO TEX certified material, which means it has been tested for harmful chemicals to keep you safe. This layer conforms to the shape of your body and provides pressure relief. Along the mattress perimeter, higher-gauge coils provide edge support.
Talalay Latex Medium-Firm Side
Once again, we have a 1.5-inch layer of Talalay latex. This latex layer has a buoyant, medium-firm feel. This side of the Plank Firm Natural mattress is a great choice if you prefer a little more “give” from a firm sleep surface. Like the firm latex layer, the medium-firm side is made from 100% natural, FSC-certified latex.
Organic Cotton and Wool Cover
When you sleep on the medium-firm side, you’ll enjoy the same quilted, 100% organic cover. This cover contains the same GOTS-certified cotton and wool as the firm side of the Plank Firm Natural mattress. The soft, breathable material will help you sleep comfortably without overheating.
Customizable Firmness Levels
With its customizable firmness level, the Plank Firm Natural mattress is like two mattresses in one. The firm side is rated an impressive 7.5 to 9.5 on a firmness scale of 1 to 10, with 1 representing the softest feel and 10 representing the firmest feel. Flip the mattress over to find the medium-firm side, which is rated 6.5 to 8 on the same scale.
Dimensions
For a quality sleep experience, your mattress should be just the right size. At 13.25 inches high, the Plank Firm Natural mattress is available in a wide range of sizes:
- Twin — 38” x 75”
- Twin XL — 38” x 80”
- Full — 53” x 75”
- Queen — 60” x 80”
- King — 76” x 80”
- California King — 72” x 84”
 
Plank Firm Natural Mattress Review: Pros and Any Limitations
Knowing how a mattress is made is one thing, but what is it like to use? We have researched and reviewed the Plank Firm Natural mattress. In our opinion, it has the following advantages as well as minor limitations.
Choose Your Firmness Level
Your favorite sleep position and comfort levels can change over time. Sometimes you may need a mattress that’s at the highest firmness level. Other times you may prefer medium firm with a little more cushioning. With the Plank Firm Natural mattress, you get the best of both worlds. Just flip the mattress to switch firmness levels.
 

 
Pressure Relief
Even the firmest mattress should provide a little contouring and pressure relief, and the Plank Firm Natural does not disappoint. The individually wrapped coils conform to the natural curves of your body and relieve pressure and help keep your spine in alignment. Your neck, shoulders, back and hips have the support they need to let you rest comfortably and wake up refreshed.
Cooling Technology
A comfortable temperature is essential for a good night’s sleep. You’ll keep your cool thanks to the breathable, moisture-wicking cover. The 100% organic cotton and wool cover draws moisture away and prevents heat retention. Plus,  the layers in the Plank Firm Natural mattress are made with open cell technology that helps keep the temperature neutral.
Edge Support
The Plank Firm Natural mattress is consistently comfortable across the entire surface. You’ll appreciate the edge support provided by higher gauge coils around the perimeter of the coil core. Edge support prevents sagging, which results in a more comfortable sleep experience. You’ll also be able to sit up and get out of bed without feeling like you’re falling off the edge.
Environmentally-Friendly Materials
When you buy any piece of furniture, you want it to be safe for your home and family — especially when you’re going to sleep on it every night. You can have peace of mind when you bring the Plank Firm Natural mattress home, thanks to environmentally friendly certifications. The mattress contains materials that are tested for toxic chemicals and sustainably sourced. That means you can get a good night’s sleep and care for the planet.
Motion Isolation
Couples will appreciate the motion isolation provided by the Plank Firm Natural mattress. The individually wrapped coils prevent motion from transferring across the mattress surface. Do you frequently change position while you sleep? Does your spouse or partner get out of bed earlier than you? Now you can both sleep undisturbed and not worry about waking each other.
Convenient Delivery in a Box
Let’s face it, buying a mattress can be a hassle. You either have to transport it home or arrange to meet a delivery team. You won’t, however, have those hassles with the Plank Firm Natural mattress. The mattress is compressed, rolled and packed in a box. Then it’s shipped for free to your door in the 48 contiguous states — even if you’re not home. Just make sure you have someone help you carry it indoors because the mattress-in-a-box is very heavy.
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Delay While Mattress Expands and Airs Out
We should mention that although shipment in a box is an advantage, you’ll probably want to wait at least a few hours before you use your new mattress. Although it expands within minutes, it will have to air out for at least several hours to get rid of an unpleasant but harmless odor. That “new mattress smell” should completely dissipate after 24 hours.
120-Night Sleep Trial
You’ll have plenty of time to decide if the Plank Firm Natural mattress is right for you. The company backs its product with a 120-night sleep trial. That’s 4 risk-free months to literally sleep on your decision. After an initial break-in period of 30 days, you can return the mattress for a full refund if it’s just not working for you.
Lifetime Warranty
Even a quality mattress can have problems. When you buy the Plank Firm Natural mattress, your purchase is protected by an impressive limited lifetime warranty. As per the related policy, the company will replace or repair a mattress that is damaged due to manufacturer defects based on what is specified as covered and excluded, and the written responsibilities. Before buying, check the latest warranty terms.
A Final Word on the Plank Firm Natural Mattress
From its environmentally friendly materials to its customizable firmness levels, we believe there are many reasons to love the Plank Firm Natural mattress. You can buy this mattress knowing that you and your family will be safe from toxic chemicals. You’ll have peace of mind knowing that the mattress is made from sustainably sourced materials.
The mattress is constructed to provide comfort and pressure relief as well as support. The individually wrapped coils conform to your shape and help keep your spine in proper alignment. The coils also prevent motion transfer so you and your spouse or partner can sleep undisturbed. Also, you won’t wake up in a sweat, thanks to the breathable, moisture-wicking cover and open cell technology.
Free shipping in a box is definitely a pro, but you may want to wait a day or so for the mattress to air out after unboxing. However, the beneficial features, 120-night sleep trial and long limited lifetime warranty outweigh this inconvenience. After our research and review, it is our opinion that the Plank Firm Natural mattress is a quality product of value.