Skip to content

Independent UK mattress reviews since 2018

Find my mattress
  1. Home
  2. Mattresses
  3. Mattress Online
  4. Rock Hard Mega Firm 1500 Pocket Mattress
Rock Hard Mega Firm 1500 Pocket Mattress
Listen to the review on our podcast.

Rock Hard Mega Firm 1500 Pocket Mattress

FirmnessExtra Firm
ConstructionPocket sprung
sleeping cat
11p per sleep based on average mattress lifespan

Searching for best deal
Reveal Offer Price and Go To Site *
100-night comfort trial at Mattress OnlineConditions
Remedy
An exchange, not a refund
When
After 30 nights' use
Condition
Buy a mattress protector from Mattress Online with the mattress
Old mattress removal
£35
Delivery
Free; to the room of your choice £20

Checked on Mattress Online's site, 10 October 2026. Full terms at Mattress Online

* We work with retailers to secure the best deals, outgoingOutgoing links are monetised

Who is it best for? powered by SnoozeScore

In our experience, the materials and construction that go into this product can make it suitable for the following people.

Back sleeping and stomach sleeper icon
For back and stomach sleepers
Additional support helps these positions
Reduced partner disturbance icon
Reduced partner disturbance
Pocket springs work independently to one another.

What our reviewers found

Pros

You don't find many very firm mattresses at this price point, giving these benefits to a different segment of user.

Owners who mention the firmness mostly rate it highly, and plenty say their back feels better for it.

All popular sizes available for fast delivery.

Cons

Unsuitable for most people.

Still a new mattress with no long term reviews, although the composition can be trusted.

Today, I'm diving into the world of ultra-firm mattresses with the Rock Hard Mega Firm 1500 Pocket Mattress from Mattress Online. Now, I know what you're thinking: "Rock Hard? Really?" But on paper this mattress lives up to its name: it carries Mattress Online's firmest rating, Extra Firm, and the filling is compressed polyester under a hand-tufted surface. One owner called it "Super rock hard, like actually rock hard". I'm here to share all the nitty-gritty details with you.

Who it will suit / Who I recommend it for

For those who've been on the hunt for a mattress that offers an orthopaedic feel and full-body support, this might just be your match made in heaven. With 1500 pocket springs, it promises to contour and support every inch of your body. Further to this, if you're eco-conscious, you'll be pleased to know that this mattress is fully recyclable at the end of its life. Plus, with its plush insulator pad, it regulates heat, ensuring you're not sweating buckets by dawn.

Who it will not suit / Who I do not recommend it for

Now, let's be clear: this mattress is not for the faint-hearted. If you're someone who dreams of sinking into a soft, cloud-like bed, the Rock Hard Mega Firm might feel more like a slab of stone. While the hand-tufted sleep surface amplifies the firm feel, it might come across as much too hard for the average person. You see, this is a specialist product, that means those without requirements for a firm mattress with orthopaedic qualities should look elsewhere. Side sleepers will also not find this product suitable as there is no sinkage for the hips or shoulders.

How firm is it?

The name says it all, the Rock Hard Mega Firm Mattress is not just firm; it's mega firm. It's designed for those who crave an intense, orthopaedic feel. We recommend this for back sleepers only who require ortho properties.

Benefit of polyester fillings

Despite its mega firmness, the mattress doesn't skimp on comfort. The High Density Compressed polyester fillings ensure a snug feel, while the blissful extra firmness ensures you're supported throughout the night. It's like having a firm yet comforting hug every time you lie down. Polyester might not seem premium, but it is particularly effective for comfort while also keeping costs to a minimum, offering a good night's sleep at fair value.

Benefit of pocket springs

The 1500 pocket springs are the stars of the show here and are typically found in more expensive variants. The benefits of these springs are vast, with them outperforming open coil and reflex foam competitors. These springs gently contour to your body, providing personalised support and ensuring your spine is aligned just right. And for those who like to live life on the edge (literally), the additional steel support around the mattress edge ensures you won't roll off.

Will the mattress suit couples?

For couples, this mattress is a mixed bag. On one hand, the individual pocket springs ensure minimal motion transfer, so if your partner is the type to dance in their sleep, you won't be jolted awake. On the other hand, the mega firmness doesn't suit most people, let alone two people together. That said, if you both require orthopaedic tension, it's a winner.

What do customers think?

Owners who mention the firmness mostly back up the name. Back pain comes up again and again: one owner wrote "it's the first time in ages I wake up without lower back pain" and another said "my back feels so much better". It can take some getting used to. One owner admitted "at first I thought it was too hard" before deciding after a month that they were happy to keep it, while another softens it with a topper ("I use a mattress topper to give it a bit of softness"). The edges get a mention too, with one owner writing "Does not dip when you sit on it." Where owners do complain, it's more often that it isn't hard enough, with some finding it softened or dipped with use ("Definitely not rock hard firm", "The middle sinks in with both sleepers rolling into the middle"), and a few were plainly unhappy, one calling it "worse than sleeping in the floor". That said, we want to be clear, this is an orthopaedic very firm mattress, it is not to be purchased by those who either sleep on their side or do not have specific firmness needs.

How we reviewed the Rock Hard Mega Firm 1500 Pocket Mattress

59 reviews in Mattress Online's feed10+ years in the mattress industryBenchmarked against 345 pocket-sprung mattresses25-point spec check5 buyer questions read339 price checks since Apr 2023

Drawing on over 10 years in the mattress industry, our team assessed the construction, materials and firmness of the Rock Hard Mega Firm 1500 Pocket Mattress from its 25-point specification in Mattress Online's listing, and benchmarked it against 345 other pocket-sprung mattresses we track. 59 reviews in Mattress Online's own feed sit behind its owner rating. We have checked its price 339 times since April 2023. How we review

How does it feel?

Personalised feel depends on bodyweight. Adjust your weight below to get an indication of how the Rock Hard Mega Firm 1500 Pocket Mattress may feel.

SnoozeScore

Still not sure if the Rock Hard Mega Firm 1500 Pocket Mattress is suitable for you?

Answer 6 quick questions to see how well this mattress fits you, and which mattresses fit you better.

Price history

From £265 (Small Single) at Mattress Online

Choose your size
£469 Read 2 Nov 2026 · excludes delivery
Shop King at Mattress Online

King price, tracked since 26 Oct

We have read the King at Mattress Online 8 times since 26 Oct 2026. The lowest was £448, first seen on 26 Oct 2026.

SizeLatest readingReadLowest readingOnTracking since
Small Single£2652 Nov 2026£24826 Oct 202626 Oct 2026
Single£2792 Nov 2026£24826 Oct 202626 Oct 2026
Small Double£3892 Nov 2026£34826 Oct 202626 Oct 2026
Double£3892 Nov 2026£34826 Oct 202626 Oct 2026
King£4692 Nov 2026£44826 Oct 202626 Oct 2026
Super King£5152 Nov 2026£47426 Oct 202626 Oct 2026

Prices exclude delivery. How we record prices: our mattress price report.

How it scores
of the Rock Hard Mega Firm 1500 Pocket Mattress
Scored from the build and owner reviews: each measure starts from how this construction usually performs, then moves with what owners of this mattress report against owners of similar mattresses.
Scored from the build and owner reviews: each measure starts from how this construction usually performs, then moves with what owners of this mattress report against owners of similar mattresses.

Suitability

  • Back Sleepers 4.5/5
  • The amount of support offered from a mattress will vary depending on the firmness of the tension and the type of support layer used. Based on a person of average build.
  • Side Sleepers 3.5/5
  • If you sleep on your side you typically need a supportive tension that is not too firm, nor too soft. This is because your hips and shoulders need adequate sinkage.
  • Stomach Sleepers 4.5/5
  • Stomach sleepers need a reasonable amount of tension in the base support layer to adequately offer body contouring and help prevent aches and pains. Results will vary based on your build.

Performance

  • Breathability 4/5
  • Mattresses that feature breathable materials help promote airflow and keep you cool making for a more hygienic night's sleep.
  • Turning on mattress 5/5
  • Certain materials like memory foam can make it difficult to move about on the mattress while you toss and turn. Same too for pillow tops which can create a cloud like sensation which can make manoeuvrability challenging.
  • Stability 4.5/5
  • Depending on the type of support layer in place can have an impact on stability, edge to edge support and roll together prevention. Pocket springs of a firmer tension will have better stability than open coil soft tension, for example.

Ease of Use

  • Turning handles 5/5
  • Mattresses typically need to be rotated frequently and having turning handles can be massively beneficial, particularly in larger sizes which can become fairly heavy.

Odour

  • Initial Odour 4.5/5
  • Materials in mattresses, particularly memory foam and rolled bed-in-a-box mattresses can have an initial odour, this is typically short term and reduces considerably within 24 hours.
  • Long Standing Odour 5/5
  • Certain materials inside different mattresses can produce a small odour. Typically this is short term rather than long standing but there are minor exceptions.

Brand Rating

  • Overall Brand Rating 4.5/5
  • This is based on community driven customer reviews tied to product reviews and grouped together at a brand level to produce a score.
*Assumes average weight. Suitability is dependent on body type, so check your SnoozeScore above for a more tailored guide.
Radar analysis
of the Rock Hard Mega Firm 1500 Pocket Mattress
Brand: Mattress Online
Retailer: Mattress Online
Delivery Time: Excellent
Delivery Charge: Excellent
Customer Sentiment: Good
Guarantee: Good
Radar Analysis looks at the product, brand and retailer against base norms established within the industry and determines where the product sits by way of established performance metrics.

Owners, by the numbers

Counted from 59 owner reviews of this mattress on retailer sites.

75%gave it 5 stars44 of 59 reviews
8.5%gave it 1 or 2 stars5 of 59 reviews
Cheapest thirdon price, at £24819 of 263 other pocket spring mattresses cost less today

Firmness against the label (extra firm)

What owners saidThis mattressAll extra firm
Felt firmer than expected0%0 of 590.4%
Felt softer than expected0%0 of 590.3%
Too firm3.4%2 of 591.4%
Too soft0%0 of 590.3%

“All extra firm” is 19,776 reviews of 59 mattresses labelled extra firm. The phrases counted are in the firmness report.

Counted from reviews published on retailer listings. Each review counts once, even where a retailer shows it on several listings, and reviews left on WantMattress are not included. The method is set out in the reliability report.

Reviews

Pick a star rating to see only those reviews.

4.5owner rating out of 559 reviews
Anonymous
Verified by Mattress Online
5
Super rock hard, like actually rock hard.... Not like some companies would say it is and you receive it it and it's not that hard. Always wanted a rock hard mattress for my back. It's amazing
Dhara
Verified by Mattress Online
4
It's supports back very well .. even though it's rock hard it's still soft enough to feel comfortable. It's best if you are looking for good support firm bed with soft feel
Ibrahim
Verified by Mattress Online
3
I have been using mattress for one month which has been softened. Even paying a lot of money which should have been softened in month.
Julie
Verified by Mattress Online
5
The mattress is as firm as it says in the description bought this as my partner had a bad back and it has worked no more back pain
Kata
Verified by Mattress Online
5
Very hard just as it says on the label. Perfect choice for someone looking for hard mattress. I can only recommend it.
Anonymous
Verified by Mattress Online
3
Not yet fully tested. As my disabled wife is in hospital. Once she gets home then finally rated.
david
Verified by Mattress Online
5
A firm mattress, exactly as I ordered plus the next day delivery on a Sunday worked perfectly
PRATEEK
Verified by Mattress Online
2
Lost its shape in lest than couple of weeks. Not hard enough. No use after spendingso much
James David
Verified by Mattress Online
5
I was looking for a very solid mattress with very firm support. This is it.
M Nixon
Verified by Mattress Online
5
The firmness is excellent and gas I'mproved both our nights sleep.
Jill
Verified by Mattress Online
5
As described!! Perfect if you want an extra firm mattress
Jay
Verified by Mattress Online
5
a very good extra firm mattress, I really love it.
MD HUMAYUN
Verified by Mattress Online
4
Overall good apart from the price are bit high
Patrick
Verified by Mattress Online
3
Definitely not rock hard firm. Very soft indeed
Anonymous
Verified by Mattress Online
5
Absolutely wonderful. My backache is gone!!
Anonymous
Verified by Mattress Online
5
Good experience overall. Satisfied
Ana
Verified by Mattress Online
5
Exactly as described! Excellent!
Alastair
Verified by Mattress Online
5
Exactly as sold and described
Renee
Verified by Mattress Online
5
It's really what we expected.
Anonymous
Verified by Mattress Online
5
Good quality and as expected
Anonymous
Verified by Mattress Online
5
No more lower back pain yay
Karl
Verified by Mattress Online
5
Although this mattress is not quite hard as rock, it is very firm and the mattress my back has for years been crying out for. I am quite sceptical when the reviews are so glowing but I thank the stars that on this occasion I haven't been misled. This mattress was delivered so well, made so well and met all my expectations!
Tanvir
Verified by Mattress Online
5
Good quality mattress, well made. I personally do not feel it is hard as rock however it is definitely on the firmer side of firm. Others who have slept on it have said it has helped with back pains also. Overall I would recommend this mattress if looking for a firm bed
Rouzia
Verified by Mattress Online
2
We've had this mattress for 3 months now and it doesn't live up to its name 'rock hard mega firm'. The middle sinks in with both sleepers rolling into the middle. I wouldn't recommend this mattress if you really need a firm or chiro friendly mattress.
Mrs Abdul
Verified by Mattress Online
5
This is a solid firm mattress. We went for this one this time as we have a super king mattress and this is the firmness we need and found a firmer mattress than the romantica adiago that we ate usually used to. Great night sleeps honestly.
Dhara
Verified by Mattress Online
4
It's supports back very well .. even though it's rock hard it's still soft enough to feel comfortable. It's best if you are looking for good support firm bed with soft feel
Mr C Wiltshire
Verified by Mattress Online
5
Great value for money. Good service and no rush policy at the front of house. Very friendly and acknowledging of understanding and working hard to meet my needs Ths ks again
Suzanne
Verified by Mattress Online
5
Absolutely perfect for me. Following on from 2 spinal fractures I need extra firm support, this mattress is ideal. I use a mattress topper to give it a bit of softness
Mr Patibandla
Verified by Mattress Online
1
This mattress is not there they suggested one more mattress which I used and not upto mark getting backpain. I want to exchange this on 28trail not satisfactory
Robin
Verified by Mattress Online
5
This mattress was even harder than I had expected, and at first I thought it was too hard. However, after a month I am used to it and happy to keep it.
Fatima
Verified by Mattress Online
5
Arrived on time ,, I suffer from back pain. And was recommended to use extra firm mattress It helps with my back alot when.i need suport at night..
Edna
Verified by Mattress Online
5
It''s very firm, in a good way, struggled to find a mattress in the shops that was this hard. Does not disappoint, my back feels so much better.
Chris
Verified by Mattress Online
5
The mattress is very firm and is ideal for my back, it's the first time in ages I wake up without lower back pain.
Francis
Verified by Mattress Online
5
Delivery was great in terms of timing and communication. Quality of the mattress is also great, as expected.
Mrt
Verified by Mattress Online
5
The staff in the shop were extremely helpful. The products we purchased are excellent and very well priced.
Jatinder
Verified by Mattress Online
4
Rock hard is fine but its got large dips and v little cushioning. I like the weight and bulk of it though
Miss C Brooks
Verified by Mattress Online
4
good quality firm mattress, however too firm and a return was arranged after a few weeks
Sharon
Verified by Mattress Online
5
Its a Rock Hard mattress great for painful backs best night sleep iv had in a while
Ermelinto
Verified by Mattress Online
1
It's actually hard firm but the sleep on it it's worse than sleeping in the floor
Wayne
Verified by Mattress Online
5
Brilliant delivery team mattress perfect 5cstar treat thankyou mattress online
Sahaya
Verified by Mattress Online
5
Bought it as hubby suffers of backpain , now he has more comfortable sleep,
Stefania
Verified by Mattress Online
5
Very firm as I wished, eventually I can rest without getting up with aches.
Nick
Verified by Mattress Online
5
The mattress we ordered is great. We are now getting a good night's sleep.
Antony
Verified by Mattress Online
5
Bought to hopefully reduce upper back pain and has done just that
Brian
Verified by Mattress Online
5
Perfect choice for me as I have back pain issue and sciatica.
Christine
Verified by Mattress Online
5
This is as description. very firm, ideal for back problems.
Mark
Verified by Mattress Online
5
Excellent service, fast delivery and a great night's sleep.
Denis
Verified by Mattress Online
5
Firm but comfortable and well supported around the sides.
James
Verified by Mattress Online
5
Perfect mattress -just as described. Next day delivery.
Turner
Verified by Mattress Online
5
Very firm mattress. Does not dip when you sit on it.
Mrs Greenhalgh
Verified by Mattress Online
5
Great mattress , fantastic advice from the staff !
David
Verified by Mattress Online
5
great service, and mattress was all we expected.
Ms Harvey
Verified by Mattress Online
5
Very good firm mattress and very comfortable
Runjan
Verified by Mattress Online
4
Has improved my sleep and backache
Muhammad
Verified by Mattress Online
1
Worse matters ever had life time
Omotayo
Verified by Mattress Online
4
Truly hard but no back support
Sharron
Verified by Mattress Online
5
Fantastic mattress very firm
Ms Tam
Verified by Mattress Online
5
The product is very nice
Mr Jipa
Verified by Mattress Online
5
Very good!

Questions and answers about the Rock Hard Mega Firm 1500 Pocket Mattress

Common questions answered by our team first, then questions shoppers asked the retailer, with the retailer’s own answers.

Image of the post author
Common question
How does this mattress offer support to the body?

Answer: Inside this mattress, there are individual springs that provide personalised support to your body, aligning with your body as you move. Particularly, it offers orthopaedic support which is good for spinal alignment, joint support, and bettering posture.
Image of the post author
Common question
Some reviews mention that the mattress softens after a month of use. Is this normal?

Answer: It's not unusual for a firm mattress to feel a bit softer after regular use, which is a part of the normal break-in period. It should, however, maintain its support and structural integrity.
Image of the post author
Common question
Is this mattress easy to move and turn?

Answer: Yes, the mattress comes with stitched handles that make it easier to move and turn, which is particularly useful for maintaining the life of your mattress through regular flipping.
Image of the post author
Common question
Are there any safety certifications or approvals for this mattress?

Answer: Yes, the product has been approved by the National Bed Federation and also conforms to BS7177: 2008 for home use, ensuring its quality and safety.
Image of the post author
Common question
How deep is this mattress and is it a suitable depth for most bed frames and bedding?

Answer: The mattress is approximately 25cm deep, a depth that should be compatible with most bed frames and bedding types.

Videos about this mattress

Hand picked video that relates to the specifications of The Rock Hard Mega Firm 1500 Pocket Mattress

Firm vs Soft Mattress
Firm vs Soft Mattress
By BedStar
What are Pocket Springs?
What are Pocket Springs?
By BedStar
Mattress Online
Mattress Online
By Mattress Online

Guides this mattress is featured in

This mattress is listed in 2 of our guides because its build meets what each guide looks for. Each card says what that is.

  • Front sleepers guide

    Why it’s featured

    This guide lists medium-firm and firmer mattresses on pocket springs or latex, with no memory foam or pillow top to sink into.

    Includes comment from a registered clinician
    Read the guide
  • Larger sleepers guide

    Why it’s featured

    This guide lists firm and extra-firm pocket-sprung and hybrid mattresses, which hold a heavier body without a dip forming.

    Read the guide

Clinicians comment on the condition in each guide, not on individual mattresses.

Sources for this review

  • Our assessmentConstruction, materials and firmness judged by our team, from over 10 years in the mattress industry
  • Specification25 points from Mattress Online's listing
  • Owner reviews59 behind the owner rating
  • Buyer questions5 read
  • Price history339 checks since April 2023
  • BenchmarkCompared with 345 other pocket-sprung mattresses we track
  • Site-wideOur price tracker has logged 1,326,830 retailer prices since June 2019

Latest advice and guides → Your Questions Answered

Below are some of our best guides for learning more about the importance of sleep.

Everything You Need To Know About Mattress Fillings Soft and Squishy Memory Foam Simple Mattress Buying Guide
This website uses cookies to give you the best experience.We use cookies. Cookie policy
VS Product Comparison
product added