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firm mattress

Best Firm Mattress 2020

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For some sleepers, a well-constructed firm mattress can create an optimal sleeping experience. Generally, people who sleep on their back or stomach enjoy a firm mattress, these types of mattresses are also well suited to heavier individuals as they provide better support and can minimise sagging in the long run.

If you are not sure where to start or what firm mattress types are out there in the UK, we hope you can get some sort of feel for the various options there are out there. It’s important to keep in mind that a firm mattress should be comfortable yet also supportive.

Here are our best firm mattress recommendations in the UK (Important Considerations in Conclusion).

SealyPosturepedic BackcarePocket sprungExtra firmNA
5 Years
Brook + WildeLuxHybridFirm100 Nights
10 Years
REM-Fit500 OrthoHybridFirm100 Nights
15 Years
SilentnightEco Comfort Miracoil OrthoPocket sprungExtra firm60 Nights*
5 Years
DormeoOptions Pocket SprungPocket sprungFirmNA
1 Year
Prices are referring to the smallest size. Information may be subject to change, please check with the brand/manufacturer before purchasing.

1. Sealy Posturepedic Backcare Extra Firm Mattress – £305

Up to 60% OFF
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sealy posturepedic backcare extra firm mattress
(Image credit: Sealy)

This mattress is called Sealy’s firmest mattress yet, the Sealy Posturepedic Backcare Extra Firm Mattress is a locally made mattress, conforming to all local regulations. This mattress is even approved by the National Bed Federation and Allergy UK. Further to that point on allergies, it has been scientifically proven to remove common allergens.

The Sealy Posturepedic Backcare Extra Firm Mattress is well received by customers and has a rating of over 9 points out of 10 from over 1,000 reviews with a high score for its support.

Sealy’s firmest mattress yet uses a unique spring layer in its construction. This spring layer features what Sealy calls their PostureTech Core Support Springs. These springs are designed to provide an exceptional level of extra firm and orthopaedic support. The spring layer was also engineered to distribute weight evenly creating excellent body support and pressure relief properties. This firm mattress was also designed to aid in spinal alignment, helping to ensure you get an undisturbed and restful sleep. 

The Sealy Posturepedic Backcare Extra Firm Mattress has a few extra features designed to provide even more support. These include Edge Guard support and the Power Pack support system. Edge Guard support provides edge to edge tension on the mattress surface constantly, allowing you to sleep near the edge without a roll-off feeling. The Power Pack support system was designed to target lumbar support, by giving you enhanced orthopaedic care and support for your back. 

When buying this mattress you receive free next day or day of choice delivery as well. You will receive a notification the night before delivery to confirm your 2-hour delivery window, so there’s no need to waste a whole day waiting for your delivery. Additionally, you also receive a 5-year guarantee with your Sealy firm mattress allowing you to rest easy knowing the mattress is covered for half a decade.


– Extra firm mattress
– Excellent customer reviews
– Edge support
– Targeted lumbar support
– 5-year guarantee

2. Brook + Wilde Lux Firm Mattress – £549

firmest mattress uk silver
brook wilde firm mattress version
(Image credit: Brook + Wilde)

The Brook + Wilde Lux Mattress comes with a choice of firmness, either soft, medium or firm. Looking at the Firm option of this multi-award-winning mattress, Brook + Wilde says that it is “less springy but more supportive” than the other comfort options. Speaking of awards, the Brook + Wilde Elite Mattress (its bigger and more advanced sibling) has been ranked highly in our luxury mattress category.

The spring layer in the Brook + Wilde Lux Mattress is split up into 2 separate layers. Above the base of the mattress is where we find the first spring layer. This layer features 1,000 tight gauge pocket springs standing at 135cm tall that gives you bounce and pushback. The second spring layer sits higher up the mattress and features 2,000 mini pocket springs. The mini springs are designed to move with you as you sleep for close supportive comfort that reduces pressure points. 

In between the spring layers, we find what Brook + Wilde calls their wave technology. This is made from support foam with added density that not only aids in spinal alignment but also provides care for your shoulders. Designed in a wave shape, this layer has 4 separate zones of support with softer and thinner foam around the neck and shoulder zones, allowing for more sink and better spinal alignment. 

An exciting inclusion in your purchase of the Brook + Wilde Lux Mattress is the free premium delivery which is delivered to your room of choice using a 2 man delivery team. Once in your room, you benefit from a 100-night trial that allows you to test the mattress in your room and ensure it is for you. To protect against the passing of time, Brook + Wilde includes a 10-year guarantee on this locally made firm mattress.


– Firm mattress
– Double set of spring layers
– Great awards
– 100-night trial
– 10-year guarantee

3. REM-Fit 500 Ortho Mattress – £599

20% OFF + 50% OFF Pillows & Protectors
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hard remfit 500 ortho
(Image credit: REM-Fit)

The REM-Fit 500 Ortho Mattress is a multi-award-winning mattress that was designed as a very firm mattress for back support may help those who suffer from back pain and bad backs and has been engineered as an orthopaedic mattress. REM-Fit also has very positive customer reviews, receiving great reviews on Trustpilot

The spring layer is key in this design and is what makes the mattress firm. The REM-Fit 500 Ortho Mattress uses 2,000 springs that are 15cm tall. The springs are constructed from triple tempered steel and encased in a pocket of fabric. This allows the springs to move and respond individually, isolating movement specifically to the springs that have pressure applied to them. The tempered steel produces the firm feel of the mattress, ensuring lasting and precise support.

To counter the feeling of the firm springs, REM-Fit includes a zoned memory foam layer that is made from open-celled memory foam. This foam layer sits above the springs, breaking the tension while keeping the firmness of the springs. While the zones in this layer provide extra cushioning that prevents pressure from building up around the bonier areas of your body, the open-cell construction provides cooling comfort while hugging your body. 

If you buy the REM-Fit 500 Ortho Mattress you will receive free delivery with an included 100-night trial period. After your trial, the mattress itself is guaranteed for 15 years, this speaks to the quality of the build and ensures that it was built to last. REM-Fit also has a 0% finance option with DivideBuy, which allows you to “buy now and pay while you sleep”.


– Firm mattress
– 2,000 pocket springs with zoned memory foam
– Edge support layer
– 100-night trial
– 15-year guarantee

4. Silentnight Eco Comfort Miracoil Ortho Extra Firm Mattress – £259

Free Safe Delivery
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silentnight cco comfort extra firm
(Image credit: Silentnight)

The Silentnight Eco Comfort Miracoil Ortho Mattress is made from 100% recyclable materials, giving you an eco-friendly sleep surface. So not only is it good for the planet but it’s also good for your wallet. Its is designed to be extra firm, providing constant support throughout the night. The Silentnight Eco Comfort Miracoil Ortho Mattress has very positive customer reviews from over 280 reviews.

The Silentnight Eco Comfort Miracoil Ortho Mattress features a unique spring layer that makes the mattress firm. What Silentnight calls their Miracoil system, the springs are designed to be twice as long in less space. This offers improved pressure relief and support. The Miracoil layer also features edge to edge support that provides more personal sleep space closer to the edge of the mattress. The zoned coils have 3 separate zones. Zones 1 & 3 are softer and are aimed at comfort for your lower and upper body. While zone 2 includes firmer support for your hips and lower back. The difference between the zones was designed to ensure correct spinal alignment takes place.

The Silentnight Eco Comfort Miracoil Ortho Mattress features a Purotex treatment, which is a natural treatment combating allergens. This creates a drier, fresher and healthier mattress. Included in your purchase of a Silentnight Eco Comfort Miracoil Ortho Mattress is a 60-night comfort exchange, which allows you to exchange your mattress for a different one if you aren’t pleased with your purchase. Silentnight also offers free deliveries to the UK and a 5-year guarantee with this mattress.

(Video credit: Silentnight)


– Extra firm mattress
– Unique Miracoil system
– Purotex treatment
– 60-night comfort trial
– 5-year guarantee

5. Dormeo Options Pocket Sprung Firm Mattress – £99.99

Up to £540 OFF
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budget dormeo pocket sprung firm
(Image credit: Dormeo)

Dormeo is an environmentally conscious brand that is committed to causing less of an impact on our environment. As such, Dormeo actively looks at materials and methods that benefit the environment and are even registered with the Furniture Industry Research Association. The Dormeo Options Pocket Sprung Mattress is a budget or cheap firm mattress option. Customers have shown their love for the Dormeo Options Pocket Sprung Mattress with some very positive reviews. You can head over there to see what some customers had to say about it especially its firmness.

What makes the Dormeo Options Pocket Sprung Mattress firm? That would be the full-sized pocket spring layer. This layer features individually wrapped pocket springs that respond and provide support individually. This means your movements will move the springs that you lay on and won’t disturb your partner or their springs. These springs cradle and fully support your whole body, with each spring cradling your body and providing support where it is required. 

The Dormeo Options Pocket Sprung Mattress features breathable layers of Ecocell foam and breathable Airmesh sidewalls. Both of these features target overheating by allowing air to circulate freely throughout the mattress. The Ecocell foam has an interesting feature in that it is designed to be permanently elastic with a 3-dimensional cellular structure. This allows it to not only allow air circulation but also provides comforting support where needed. 

The Dormeo Options Pocket Sprung Mattress comes with free delivery to your front door. Also included with this firm mattress is a 1-year warranty. While it may be cheaper than some, you can be certain that it will last at minimum a year.

(Video credit: Dormeo)


– Firm mattress
– Budget mattress
– Breathable Ecocell foam
– 1-year warranty

Research and Resources for our Top Picks

In creating this article, we:

  • Searched through many online mattresses, targeting mattress considered firm or firmer.
  • Scoured through customer reviews to see how many recommended it and what some had to say
  • Took into consideration the pros and cons of each firm mattress in order to come to our final conclusion.

*This list is our opinion and can be a great foundation and sum up of information about some of the firm options out there especially if you don’t know where to start or know what is out there. We always recommend you do your own research to come to a decision that makes you as a buyer happy.

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