Plank Firm Natural Mattress Review

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Plank Firm Natural Mattress

The Plank Firm Natural is a flippable mattress with firm and medium-firm firmness options. Its unique structure features the use of Talalay latex, a sustainable and natural material. It delivers the perfect balance of comfort and support to mostly back and stomach sleepers.

Final Sleepiverse Rating


out of 5

Product Details
Mattress Material icon
firmness icon
Meduim Firm and Firm
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120-Night Trial Period
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Free Shipping and Easy Returns
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10-Year Warranty
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$1,399 - $2,665
This mattress is a good choice for:
Back Sleeping

Ideal for lightweight, average weight, and heavyweight back sleepers.

Stomach Sleeping

Ideal for lightweight, average weight, and heavyweight stomach sleepers.

Environmentally Conscious Sleepers

Ideal for people looking for a product made of natural and eco-friendly materials.

Plus-Sized Sleepers

Provides excellent comfort for plus-sized sleepers or heavier sleepers.

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Plank is a sleep brand that specializes in making a wide range of products, from mattresses to bed sets and bed frames. They aim to help sleepers and provide them with the best sleep experience possible out of using their innovative products.

The Plank Firm Natural mattress is made of Talalay latex which is a unique material that comes with many benefits, including breathability, a great balance of comfort and support, and its resistance to dust mites or molds.

Plank Firm Natural mattress

In this review, we'll cover:

  • Pros and cons
  • Unboxing experience
  • Comfort and feel
  • Construction and design
  • Performance results
  • Warranty and company policies, along with FAQs

Please note that our upcoming performance tests were conducted on the medium-firm side of the Plank Firm Natural mattress.

Plank Firm Natural Mattress Overview


  • Excellent Support: The Plank Firm Natural mattress provides exceptional support for stomach sleepers and plus-size sleepers through its firm profile. The combination of premium Talalay latex and individually encased coils helps maintain spinal alignment and prevent sinkage. The encased coils reinforce support, distribute weight evenly, and eliminate potential sagging.
  • Back Pain Relief: The buoyant nature of the Talalay latex layers gives extra support, providing effective back pain relief. The medium-firm layer delivers great comfort without compromising the firmness and support of the Plank Firm Natural mattress. The individually encased coils provide targeted support in the lumbar region, alleviating pressure points and back pain.
  • Sustainable Materials: The Plank Firm Natural design and materials set it apart from other options in the market. It is one of the very few natural mattresses with a firm feel. Natural and sustainable materials were used in the making of this mattress, such as organic cotton and wool. This will appeal to environmentally conscious buyers as the choice of materials in this mattress aligns with eco-friendly practices.


  • Not for all sleepers: The Talalay latex layers may feel overly firm to lightweight sleepers and side sleepers. This could lead to the formation of pressure points in sensitive areas.

Who we Recommend the Plank Firm Natural Mattress for

  • Back Sleepers: Back sleepers need a supportive mattress that can maintain proper spinal alignment and prevent excessive levels of sinkage. The Plank Firm Natural offers great support through its latex layers and coil system which help sleepers by supporting the natural shape of their body.
  • Stomach Sleepers: The firm profile of the Plank Firm Natural helps prevent sagging and maintains an elevated hip for proper spinal alignment. This is a great feature for stomach sleepers as it will help distribute the body weight evenly, avoiding pressure in the chest and stomach area.
  • Heavy Sleepers: The Plank Firm Natural features ultimate support that might appeal to plus-size sleepers. Its design incorporates a system of individually encased coils and firm Talalay latex layers that work together to provide support. Its structure can withstand above-average weights and will be able to deliver sufficient support.
  • People who Value Responsiveness: The Talalay latex layers included in the Plank Firm Natural are known for their buoyant quality. Those who prioritize responsiveness in a mattress will appreciate this aspect as it will allow for ease of movement. The Talalay latex will create a much more dynamic sleep experience, preventing any stuck feeling.
  • Eco-conscious Sleepers: The manufacturing of the Plank Firm Natural shows great commitment to sustainable and environmentally friendly practices that can be seen in the design of the mattress. The use of organic cotton and wool in the quilted top cover makes this mattress an ideal choice for eco-conscious sleepers. Additionally, Talalay latex is considered to be a renewable source that does not greatly impact the environment.

Unboxing the Plank Firm Natural Mattress

The unboxing process was hassle-free and simple. The mattress was compressed in a box. We then unrolled it onto our sleeping surface and monitored its expansion time and off-gassing process.

The Plank Firm Natural mattress expanded to its full size in 2 hours which is relatively a short period. The edges of the mattress expanded along with the rest of the mattress and did not take much time, as they are not reinforced. This indicates great corner expansion.

This mattress performed well regarding off-gassing. It emitted no strong initial odor, likely due to the hypoallergenic properties of the Talalay latex. Additionally, the organic cotton and wool used in the Plank Firm Natural mattress are inherently less likely to emit strong smells compared to synthetic materials.

Firmness, Feel, and Comfort For Plank Firm Natural Mattress

Plank Firm Natural Mattress Firmness

The Plank Firm Natural is flippable and each side has a different firmness level for versatility and a personalized sleep experience. The inclusion of Talalay latex adds to the firmness of both sides of the mattress by providing extra support. The firmness levels available are medium-firm scoring 6/10 on the firmness scale and firm scoring 8/10.

Plank Firm Natural mattress firmness

The medium-firm Talalay latex offers the perfect balance between comfort and support for sleepers who prefer a bit more body cushioning. The individually encased coils contribute greatly to the firmness of the mattress by serving as the core support and providing high responsiveness.

Plank Firm Natural Mattress Feel

Upon lying on the Plank Firm Natural mattress, we felt excellent body cushioning without compromising the great level of support offered by the layers of this mattress.

The Talalay latex is known for its buoyant nature which helps the mattress adapt to body movements and creates a floating or “on-top” feeling that may appeal to some people.

The quilted top cover is made of organic cotton and wool. This promotes airflow through the materials’ high breathability, maintaining a temperature-regulated sleep environment. This creates a cooler sleep surface, benefiting sleepers who get night sweats more often.

Plank Firm Natural Mattress Comfort

The comfort of a mattress varies depending on the sleeper’s body weight and preferred sleep position. We tested out the Plank Firm Natural mattress across different body weights and sleep positions to evaluate its comfort delivery.

Plank Firm Natural mattress comfort

This mattress felt most comfortable for back sleepers and stomach sleepers of all weights. The firm nature of the mattress ensures great levels of support for healthy and proper spinal alignment. It also incorporates individually encased coils which offer targeted support and high response, enhancing the comfort provided to sensitive areas like the back and hip areas.

However, the Plank Firm Natural mattress did not deliver sufficient comfort to side sleepers. This mainly comes from the high firmness level of this mattress which makes it a challenge to provide pressure relief in critical areas like the hips and shoulders. It also felt too firm for lightweight sleepers and might potentially lead to increased pressure points and an overall uncomfortable sleep experience.

Sleeper WeightBack SleepersSide SleepersStomach Sleepers
Lightweight (Under 150 lb)Very GoodFairVery Good
Average (150 – 250 lb)ExcellentGoodExcellent
Above Average (Over 250 lb)ExcellentGoodExcellent

Constructions, Materials, and Design

Materials and Design

The Plank Firm Natural mattress features an innovative design, composed of a quilted top cover made of organic cotton and wool, promoting a cool and dry sleep environment through its high breathability.


Plank Firm Natural mattress layers

  1. Quilted Top Cover: The material of this layer is sustainably sourced organic cotton and wool. The cotton’s high breathability offers the mattress a more temperature-regulated sleep surface by allowing airflow and providing moisture-wicking properties.
  2. Premium Talalay Latex (Firm): Talalay latex is known for its buoyant nature which provides it a supportive yet comfortable feel. This gives the mattress a firmness level that allows for muscle relaxation and tension relief by alleviating pressure after a long day and ensuring proper spinal alignment.
  3. Individually Encased Coils: This coil system of individually wrapped coils is made to deliver extra support and body contouring. It enhances the mattress’s responsiveness by allowing each coil to independently adapt to your body movements. This reduces sleep disturbance resulting from movement, making the Plank Firm Natural a good choice for couples.
  4. Premium Talalay Latex (Medium-Firm): An additional layer of Talalay latex but with a medium-firm density. This layer offers a slightly more soft feel in comparison to the upper firm layer. It contributes to a comfortable and supportive sleep by allowing you to relax your muscles and relieve tension.
  5. Quilted Top Cover: Just like the top cover on the opposite side, this cover is made of organic cotton and wool. It adds extra comfort while ensuring a cool and dry sleep surface.

Performance of Plank Firm Natural Mattress


The cooling effect of a mattress is crucial for a comfortable sleep experience, specifically for hot sleepers.

To conduct our standard cooling test, we lie down on the mattress for 20 minutes, waiting for the bed to absorb body heat, and then measure the temperature of the mattress.

We did not notice any signs of body heat build-up and the mattress surface felt cool throughout the test.

dog setting on Plank Frim Natural mattress

The Plank Firm Natural mattress comes with a quilted organic cotton and wool top cover which aids in temperature regulation and provides a cooler sleep environment through its high breathability.

The Plank Firm Natural mattress scores a 4.8/5 on our cooling test.


A responsive mattress is important for ease of movement during your sleep.

For our responsiveness test, we use a 20-pound ball. Once fully settled in, we measure how long the mattress takes to recover and retain its original shape.

The response time recorded was 0.3 seconds, indicating a high level of responsiveness in the Plank Firm Natural mattress.

The high buoyancy of the Talalay latex adds more responsiveness to the Plank Firm Natural by allowing sleepers to switch through positions swiftly and comfortably without getting any stuck feeling.

We rate the Plank Firm Natural 5/5 on our responsiveness test.

Motion Isolation

Motion isolation is necessary for couples or people who share a bed. It helps minimize sleep disturbances during the night.

For our first test, we placed a glass of water on one side of the mattress and dropped a 20-pound ball on the other. The water on the other side showed slight movement.

In the second test, one person lay on the mattress while another rolled around on the other side of the bed. The person lying at rest reported that they felt very slight movement from the other side.

The Plank Firm Natural mattress incorporates a system of individually encased coils. The individual wrapping contributes to the minimization of motion transfer which in turn helps prevent disturbances caused by you or your partner’s movement, promoting an uninterrupted and more restful sleep.

However, the addition of Talalay latex layers adds to the mattress’s responsiveness greatly which makes it difficult for the mattress to absorb motion as well as it should.

In terms of motion isolation, the Plank Firm Natural mattress scores a 3.8/5.

Edge Support

A mattress with good edge support maximizes the usable surface area of the mattress and helps prevent any roll-off feeling you might get by sitting or sleeping on the side of the bed.

Plank Firm Natural mattress

We tested out edge support performance by applying pressure to the edges of the mattress and observing to see its level of compression. We noticed that it didn’t compress, and the edges sprung back quickly.

We also sat on the edges of the bed and felt minimal levels of sinkage that aren’t disturbing to one’s sleep.

The individually encased coils in the Plank Firm Natural mattress enhance edge support by providing stability and a sense of security. It also helps prevent sagging around the perimeter of the mattress and maintains the mattress’s structure integrity for more durability.

We give the Plank Firm Natural mattress a 4.5/5 for our edge support performance test.


A quiet sleep environment is essential for undisturbed sleep and rest. Mattresses with coil systems are more likely to produce noise.

We conducted our standard noise test by dropping a 20-pound ball onto the mattress. With the Plank Firm Natural bed, we used highly sensitive microphones to listen for any noises produced. The mattress was silent and we did not hear any noise.

The Plank Firm Natural mattress performed great in terms of noise performance. The latex layers in the mattress did a good job of absorbing any produced noise, contributing to a peaceful sleep experience.

We give the Plank Firm Natural mattress a 5/5 for noise performance.


There are certain factors to be taken into consideration when evaluating the sex performance of any mattress, those factors are edge support, noise, responsiveness, and bounce.

The buoyant quality of the Talalay latex layers in the Plank Firm Natural contributes to a highly responsive surface which creates ease of movement, promoting a more comfortable space for intimacy. It also gives the mattress high levels of bounce.

The edge support on this mattress is sufficient for a sense of security for you and your partner. The mattress performs well in terms of noise and does not produce any squeaks that may be of disturbance.

The Plank Firm Natural mattress rates a 4.5/5 for sex performance.

Pressure Relief

Pressure relief in a mattress is important for a comfortable sleep experience. There are sensitive areas of the body that need more pressure relief for proper spinal alignment during sleep.

Our pressure relief test is conducted by using a pressure mapping system to measure the pressure levels throughout the body while lying on the bed.

The pressure map below displays the results we collected.

Plank Firm Natural mattress pressure relief

  • Hip Region: The map displayed blue and green colors which indicated the moderate level of pressure relief. The Plank Firm Natural mattress struggled to eliminate pressure points in the hip region due to its firmness level. This tells us that side sleepers will feel that this mattress is too firm.
  • Back Region: The pressure map revealed a consistent blue color which indicates the absence of pressure in the back area. This tells us that the Plank Firm Natural mattress minimized pressure points well in the back region.
  • Shoulders Region: The Plank Firm Natural did not relieve much pressure in the shoulders area, as firm mattresses do not relieve a lot of pressure as opposed to softer mattresses.

Overall, we believe the Plank Firm Natural mattress scored a 4.5/5 on our pressure relief test.

Plank Warranty and Company Policies


Plank provides a 10-year warranty that covers manufacturing defects in your Plank Firm Natural mattress including material flaws, foam splits, and other defects that you can check out on their website.


Plank provides customers with a 120-night sleep trial that allows them to test the mattress for themselves before making a decision on keeping it or not.


If you decide to return the Plank Firm Natural mattress, you can request a return of your mattress, and customer service will issue a refund for you.


Shipping is available for free in the United States and your mattress will ship compressed in a box. You can track the shipping time of your order on their website.


The prices and variety of sizes are shown in the table below. Prices are before discounts, so make sure to check the prices.

Twin38″ x 75″ x 11″$1,399
Twin XL38″ x 80″ x 11″$1,599
Full53″ x 75″ x 11″$1,865
Queen60″ x 80″ x 11″$2,132
King76″ x 80″ x 11″$2,665
Cal King72″ x 84″ x 11″$2,665

The Plank Firm Natural mattress offers remarkable value considering its quality of materials and design. The use of sustainable materials shows commitment to eco-friendly practices and good quality. This sets the Plank Firm mattress as a cost-effective choice for people seeking a mattress that delivers comfort, support, and sustainability.

Policies Overview

Warranty10-Year Warranty Mattress
Trial120-Nights Free Trial
Return PolicyFree Returns
ShippingFree Shipping in the United States
Financing OptionsZero Interest - Via Affirm
Country of OriginProudly made in the United States

FAQs about Plank Firm Natural Mattress

What is the Plank Firm Natural mattress made of?

The Plank Firm Natural comes with a quilted top cover made of organic cotton and wool that are highly breathable and promote a cooler sleep environment. It also incorporates Talalay latex layers that have a buoyant quality, enhancing the mattress’s responsiveness.

How long does the Plank Firm Natural last?

The Plank Firm Natural includes a coil system of individually wrapped coils that enhance the mattress’s durability and longevity. The Talalay latex layers added are known for their high resilience, prolonging the use of the mattress. So you can rest assured that your mattress will last a long time.

Is the Plank Firm Natural too firm?

The Plank Firm Natural comes in two firmness levels, medium-firm and firm. The feel of the mattress may be subjective to the sleeper’s weight and sleep position. This mattress feels relatively firmer than it is to lightweight sleepers which leads to discomfort during sleep.

Plank Firm Natural Mattress Review Final Verdict

Overall Rating


out of 5

firmness icon
Edge Support
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Motion Isolation
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Company Policies
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Pressure Relief
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Temperature Regulation
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Unboxing Experience
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Sex Performance


The Plank Firm Natural mattress best fits stomach and back sleepers. It features great support, body cushioning, and maintains proper spinal alignment during sleep.

It also ensures a cool and comfortable sleep environment with its premium quilted top cover made of highly breathable organic cotton and wool.

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Verified Brand
Expert Pick

Plank Firm Natural Mattress

Exclusive Discounts Available - Get The Best Price Now

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Expires Soon
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Dom Abraham

As the lead content writer at Sleepiverse. Dom pours his heart into writing mattress reviews, bedding product reviews, and medically-reviewed health articles. Dom is from Portugal and likes to spend his free time writing on the beach as it gives him a sense of comfort. Aside from writing mattress reviews in front of the soothing beach view, Dom likes to experiment with new amazing food ideas.