Rock Hard Super Firm Mattress Rated 5/5 based on 119 customer reviews
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Rock Hard Super Firm Mattress

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£277.25
sleeping cat
11p per sleep based on average mattress lifespan
Single3' x 6'3
Small Double4' x 6'3
Double4'3 x 6'3
King Size5'0 x 6'6
Super King6'0 x 6'6
With Divan Bed Set
With Ottoman Bed Set
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snooze score logo Find out if the Rock Hard Super Firm Mattress is suitable for you by answering 4 simple questions. Take the quiz

Why Our Sleep Experts Loved It

becky says

The Rock Hard mattress is the 'super firm' option from Mattress Online, offering orthopaedic support with 23cm depth and featuring reflex foam, this mattress is extra firm and suitable for those looking for additional support while sleeping.

This luxury memory foam mattress is designed to relieve pressure on the shoulders, hips and back, whilst supporting the head and neck for a comfortable sleep. A perfect combination of reflex foam with a knitted cover that is removable cover allows for easy cleaning, whilst providing ventilation. 

This Rock Hard Super Firm Mattress is also hypoallergenic. It includes turning handles so that it's easy to rotate the mattress when changing its position. The Rock Hard has been handcrafted in the UK and is single sided, meaning that the top layer houses the comfort and the bottom layer has the support, saving you the convenience of having to otherwise flip the mattress.

How does it feel?

Firmness of The Rock Hard Super Firm Mattress depends on bodyweight. Adjust your weight below to get an indication of how it may feel. Remember though that firmness is entirely subjective.
weight description image

Key Performance Indicators KPI question mark
Of The Rock Hard Super Firm Mattress
Our Key Performance Indicators are produced using a combination of specification-heavy algoritmic data points and user reviews.

Key Performance Indicators KPI question mark

Our Key Performance Indicators are produced using a combination of specification-heavy algoritmic data points and user reviews. For example, a firm pocket spring support layer is more breathable and offers better back support but may prove unsuitable for side sleepers, the reverse is true for a soft-medium tension reflex foam support layer. This is one of 100+ datapoints considered when generating the below ratings.

Suitability

*Assuming average weight, suitability will vary dependant on body type, use the quiz above for a more tailored guide.
  • Back Sleepers
    ★★★★★
    ★★★★★
  • 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
    ★★★★★
    ★★★★★
  • 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
    ★★★★★
    ★★★★★
  • 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

  • Stability
    ★★★★★
    ★★★★★
  • 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
    ★★★★★
    ★★★★★
  • 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
    ★★★★★
    ★★★★★
  • 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
    ★★★★★
    ★★★★★
  • Certain materials inside different mattresses can produce a small odour. Typically this is short term rather than long standing but there are minor exceptions.
Of The Rock Hard Super Firm Mattress
Brand: Mattress Online
Retailer: Mattress Online
Delivery Time: Excellent
Delivery Charge: Excellent
Customer Sentiment: Excellent
Guarantee: Excellent

Calendar Icon Radar Analysis Radar Analysis Question Mark

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.

What Makes The Rock Hard Super Firm Mattress Great?

Our firmest-ever mattress!

When we fall asleep, our muscles relax and what that does is it allows our body to decompress. But when we're sleeping on a too soft mattress, the muscles don't have enough support and they're not getting the proper relaxation.The benefits of a firm mattress are that you're going to sleep more soundly,  your back pain is going to be relieved and you're going to have less muscle aches and pains.

Perfect if you love a super-firm feel and plenty of full-body support

When we fall asleep, our muscles relax and what that does is it allows our body to decompress. But when we're sleeping on a too soft mattress, the muscles don't have enough support and they're not getting the proper relaxation.The benefits of a firm mattress are that you're going to sleep more soundly,  your back pain is going to be relieved and you're going to have less muscle aches and pains.

A full foam block - no springs, for more consistent support

Extremely firm from edge to edge

When we fall asleep, our muscles relax and what that does is it allows our body to decompress. But when we're sleeping on a too soft mattress, the muscles don't have enough support and they're not getting the proper relaxation.The benefits of a firm mattress are that you're going to sleep more soundly,  your back pain is going to be relieved and you're going to have less muscle aches and pains.

Orthopaedic support to care for your back

The need for orthopaedic mattresses is increasing rapidly. They are becoming more popular due to the growing needs of people with back problems.Orthopaedic mattresses are designed to provide support to the spine and avoid the sagging that compresses spinal discs. They are often used for people suffering from back pain who need more support and for those with a history of back problems.

Knitted fabric cover for a smooth sleeping surface

Knitted covers offer a good degree of breathability that helps keep you cool while you sleep which is also particularly important for hygiene. Knitted covers are also incredibly soft making the fabric an ideal outer layer.

Single-sided for easier care

A single sided mattress is typical for the industry and relates to how  a mattress has the comfort layer on one side of the mattress. only This means that the mattress only needs to be rotated rather than flipped. The benefit of single sided mattresses is that they require less upkeep in that there's no flipping, but also, there's less components involved in the creation which saves costs.

Easy to move using the robust built-in turning handles

This mattress comes with turning handles that will assist in the rotation and flipping of the product. May seem like no big deal selecting a mattress without handles, however, their use is critical in the movement of larger mattresses and can be the difference between pains and inconvenience and not,

Arrives rolled-up - easy to move around your home

Rolled mattresses have a unique benefit in that they expand to the size of a normal mattress but are delivered rolled up. The benefit of rolled mattresses is that the retailer is able to offer significant discounts since there are savings in logistics, storage and delivery costs that can get passed to the consumer. As a result it is often cheaper to purchase an equivalent rolled mattress compared to its non rolled counterpart.

Depth: 23cm

23CM of mattress height is about standard for a good quality product. While the height of a mattress does not necessarily correlate to the quality, it does become harder to get good quality materials and fillings into a smaller frame. To that end, a mattress of 23cm is a good sign that the mattress may be a quality product. For this size of mattress you should just about be able to use normal fitted sheets without issue.

10 Year Guarantee

A 10 year guarantee is a huge reflection of just how much trust the manufacturer and the retailer have in their product. for reference, mandatory requirements are for a 1 year guarantee.

Made in the UK

These are made and manufactured in the UK, meaning that they all meet the same exceptional quality and durability that we expect from genuine UK manufacturing.

Reflex foam

Reflex foam is basically like memory foam without the memory part. Reflex foam is used more as a supportive layer than a comfort layer and is often used as an alternative to conventional spring systems.

Knitted Cover

It is common in the industry to have a knitted cover, these covers can come in a variety of patterns but are typically hard wearing and do not present problems for consumers.

Removable cover

Removable covers are great. We don't typically replace mattresses for 7-8 years. That's a lot of body fluids and protectors and sheets can only do so much. To that end getting that extra layer of cleanliness goes a huge way toward ensuring you get longevity out of your product.

Orthopaedic Support

Do you suffer from back pain? If so you will likely find that an orthopaedic mattress will be massively beneficial to you. Slightly firmer in the comfort side of things but ultimately with a better support layer means that your back and neck will thank you for years to come.

Hypoallergenic

This product is unlikely to cause any sort of allergic reaction. Ideal if you suffer from any sort of allergy problems

Extra firm

Extra Firm mattresses are great for those that have a heavier BMI than average, or, for those of average of higher BMI that suffer from back pain. If you find yourself sleeping on your side, or you are of a lower BMI, you may want to consider a lower firmness mattress as this will likely not be suitable.

23cm deep

23cm Or 9 inches is slightly larger than the industry standard 7 inches. Most offer a range between 10 to 14 inches and the higher the load, the deeper it needs to be. 9 Inches sits comfortably in the lower-middle weight range. 

Air Vents

When you sleep you also sweat, when this happens it generally leaks into the mattress. Sounds a little gross but that is the way it works, no drama however as matresses are built to be breathable and air out any moisture buildup, the addition of air vents helps ensure this happens with peak efficiency

Rolled-up

Rolled up mattresses are ideal for anyone looking at trying to get a mattress up a tight staircase or in a car to bring home from the shops. Do not missunderstand just how troublesome getting a mattress up stairs can be. Heavy and cumbersome, sometimes a rolled up mattress that expands to the side of a full mattress anyway, may be the better option

Single-sided

Single sided means only one side is comfy. Positives are you only need to rotate the mattress occassionaly rather than the more cumbersome rotate and flip. Downside is the lifespan of the product may suffer as a result, only marginal, but worth mentioning.

Includes turning handles

Oh turning handles are pointless I hear you say. Just try flipping and turning this product without handles. It can be a pain. Remember that mattresses should be both rotated and flipped frequently, not a problem if you are opting for a sinle, but those doubles and kings can get heavy. Handles are very good.

Handcrafted in the UK

Handcrafted in the UK means that the product is built here, by people being paid a fair and honest wage using certified and safe products of good quality and construction. UK manufacturing is some of th best in the world and all of that is reflected in this product

Fire Resistant

Fire resistant does not mean the product will never catch fire, rather, it will not go up in flames quite so quickly. Resistant to fire in the same way that I am resistant to kisses, sooner or later you end up giving in.

Approved by the National Bed Federation

The NBF is one of the most prestigious awarding federations in the industry, helped slightly by the fact that it is one of the only, however, it is still a great source of comfort knowing that this product holds approval by the team

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Customer Reviews For The Rock Hard Super Firm Mattress

Based on 119 reviews
5

My mum developed a bone condition which made her soft mattress uncomfortable and shed wake up in pain. We changed it for this rock hard mattress which, even though it is hard, its really comfortable and does the job she wanted it to. Its a thick mattress so fitted sheets only go half way down it but thats not a problem. Its an excellent mattress if youre looking for a super firm one.

5

I had been sleeping on the floor for 2 years before buying this mattress, and was sceptical as to whether the mattress would be hard enough for me. After 3 or 4 years of suffering with lower back pain, I am delighted that after just a few nights sleeping on this mattress, I am virtually now pain free!! Very, very happy with it, would definitely recommend if you need a hard mattress.

5

Excellent mattress-delivered 3 weeks ago and didnt want to leave a review until we had slept on it! Brilliant can say it lives up to the hype- yes it is as it states very firm but its also very comfy and can say that my aches and pains have gone and getting a much better sleep

5

Very firm and extremely comfortable. I loved this mattress from the first night and within a few days my back ache was gone. This is my 4th different brand mattress in 2 years, fingers crossed it'll continue to provide the support I need

5

Easy to order and the fact it was made in the uk was well advertised. The quality is good and it does exactly what is says on the box. It is an extremely firm mattress, so be very certain that you want a firm mattress before buying.

5

It is really super firm mattress as advertised and it is what I was looking for. 1 Month gone, so far all good. Will see how it is after 6 months. hopefully all firm.Order amendment and Delivery was quick even in lockdown.

5

Best mattress ever, been looking for a really firm mattress to replace my old Sealy one. So difficult to buy a mattress as firm as this, gave up looking in the shops.If like firm support this mattress is for you.

5

As named, hard rock firmness provides great support and has done a really good job on my back pain. It is firmer than the general "extra frim" ones and it's exactly what I've been looking for.

5

SO FAR IT IS ABSOLUTELY PERFECTALL MY ACHES AND PAINS IN THE BACK AND NECK have gone since I have started to use this mattress JUST WHAT I WANTED

5

I've been using it for almost a month and I have nothing to complain about, he is really very firm, my back pains are gone, I hope it stays that way, so far I recommend for sure.

5

I weight 118kg. I don't make a dent in the thing.Have had it for a few weeks and going well so far.I recommend for heavy people either muscular or 'cuddly' body types.

5

That I can get out of bed pain free, that I can lay down and sleep and not have to sleep on adjustable chair. The mattress is just perfect in every way - a really good purchase.

5

Ultra firm as advertised. When the memory foam moulds you get a great nights sleep and feel fresh in the morning if this type of mattress is what youre used to or looking for.

5

Extra firm, It feels like you are sleeping on the floor but very comfortable. I used to feel tired when I wake up, but now it feels like I had a very good rest. I love it.

5

Just what I really wanted for a very long time,um glad I cam across this one ,just makes me sleep peacefully and comfortably.i just love my bed since the time I brought it.

5

Great delivery service,two blokes was spot on. Matress is absolutely rock hard and taking some getting used to, but our neck back and every other pain are gradually going.

5

Wow, it's firm, really firm! Wasn't sure for the first couple of nights but now I swear by it. If you want that true ortho support this mattress must be the one.

5

Best mattress ever, struggled for years to find a mattress firm enough for me. Believe the name, it really is super firm.You have one very happy customer, well done.

5

vey firm mattress but no springs to fail.and not too firm you can always use a mattress topper.very good for a heavy man ike me because for us sperings fail.

5

Its a five star product for me 100 % satisfied with the mattress. Value for money, comfort and all in one. I would definitely recommend again and again.

5

Good point is it is bit harder then other mattress but you can't name it Rock hard because do you know the meaning of rock? it is not rock hard......

5

Very firm. I have back problem and can't sleep on soft beds. I am super duper happy with this. It's firm like hell.. Just the way I like it..

5

Looks and feel like quality mattress, good value for money. Got delivered within 2 days and after rolled up took couple hours for restore the shape.

5

needed a firm mattress this one is really firm and comfortable best i have had and was a good price also it was next day delivery at no extra cost

5

It's rock hard and full foam as it said on the specification and that is exactly what I needed. Delivery was excellent, on time and very quick

5

Excellent Mattress and never seen any mattress as hard as this and this is what I was looking for. It really helps me supporting my back problem.

5

Its very Hard and firm as described, good for back pain. Overall highly Recommended if someone is looking for hard firm solid mattress.

5

Wanted very firm mattress and this is exactly so. Have only used it for less than a month and is too early to comment on durability

5

I was looking for a firm nonspring mattress and this has really worked for me, my back pain is also slowly going away, I think.

5

Its not rock hard but comfortably hard enough to sleep. The only drawback is that the edges are comparatively medium soft.

5

It is firm However it is still too early to do further comments, after 3 years I will be able to say something about.

5

If you are after a super firm mattress, then close your eyes and purchase this Rock Hard mattress. You will love it.

5

Just the best sleep I have had in a very long time. From the first night I have slept well and continue to do so.

5

Solid and very very firm and for me a comfortable mattress. Good quality and feels like it will last forever.

5

Rock hard and yet with that little bit of give. Its the mattress I didnt think existed. Brilliant!

5

It's truly hard rock and make me feel relieved from back pain which I got from my old mattress.

5

Best thing for the back i have bought. Feels soft but is hard to sleep. Depends what you used to.

5

It is super hard taking time to adjust but my back is thankful ! Great quality and very solid !

5

Mattress with best support I've ever tried in UK. Value for money too. Highly recommended.

5

When it's firm it's good but it does not last long , have to rotate every other day

5

This is the hard mattress as what its name which is the exact mattress I'm looking for

5

It is SO comfortable the support is so good that it almost feels like youre floating.

5

2 months after the purchase and I have no regrets, firm and supportive top job GNC.

5

Hard as we expected. Much more affordable than some well known mattresses.

5

It's really as hard as I expected, I love the feel of the mattress

5

The product is called rock hard It should be called soft mattresses

5

Firm than most of the other memory foam mattress.Comfortable Cosy.

5

Really impressed and my husbands back ache has improved So much.

5

It is comfortable hard . My back stoped hurting after I had it .

5

This is definitely the firmest mattress I have ever encountered.

5

Very firm, edges also provide good supports. No more back pains

5

what we are expected same extra firm. good for my mother, happy

5

It's rock hard. Exactly as described.Super fast delivery.

5

Harder than many others in the market who claim as very firm

5

I am completely satisfied.I feel the money I spent worth it

5

Just exactly what we want after trying a number of mattress

5

Was ok on first night but then started to have back aches

5

Thats what I was looking for. Very good quality mattress.

5

really comfy and provide enough support, highly recommend

5

Day one it reduced my aches and pains and I sleep well.

5

Firm mattress with great support and no pressure points

5

Lives up to its name. It is indeed very hard mattress.

5

This mattress is Very firm then my expected. Its good!

5

Love the mattress, they are so good and comfortable.

5

Great all over, I hope it'll last a few years

5

It is firm enough but not as firm as i expected.

5

Very Happy with the product and level of service

5

Its very firm hope its last Many many years

5

First week was good and then it started sagging

5

It is hard as expected as well as comfortable.

5

Excellent mattress, great support to the back.

5

Not bad but not enough hard as it should be

5

Good value for money.As hard as expected.

5

Cant use it and you wont take it back

5

Lovely firm mattress perfect for bad back

5

Well its says its bricks hard but not

5

From beginning to the end I felt good

5

Fully support my back Make me sleep well

5

It keeps its shape and stays really firm

5

Hardest mattress you will ever sleep on.

5

Hard and comfortable just like I wanted

5

Good delivery good mattress very happy

5

Love this matress it's super firm.

5

Feels like your sleeping on the floor

5

I love everything about the matress.

5

NOTHING,PRODUCT IS NOT AS DESCRIBED

5

First few weeks, amazing mattress!

5

Firmest mattress I've ever had

5

It s firm and it s good for sleep

5

The quality is good as described

5

Exactly the consistency I wanted

5

Best I mamage to find up to now

5

Quick service, descent mattress

5

it is really hard as it claims.

5

Not more back and joints pain.

5

Firm and Support as expected.

5

Hard as rock, value for money

5

No role to and lovely lay on

5

Very firm and quality made

5

Firm enough Good support!

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