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Rock Hard Super Firm Mattress Rated 4/5 based on 41 customer reviews

Rock Hard Super Firm Mattress

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Becky's Thoughts On The Rock Hard Super Firm Mattress

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.

What Makes The Rock Hard Super Firm Mattress Great?


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

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.

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

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

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.

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.

Arrives rolled-up - easy to move around your home

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,

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.

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.

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.


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.

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

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.

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.


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

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.

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.

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.

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. 

Our firmest-ever mattress!

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

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

Extremely firm from edge to edge

Orthopaedic support to care for your back

Knitted fabric cover for a smooth sleeping surface

Customer Reviews For The Rock Hard Super Firm Mattress

Based on 41 review

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 itll continue to provide the support I need


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.


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.


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.


I weight 118kg. I dont 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.


Wow, its firm, really firm! Wasnt 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.


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.


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


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


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.


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


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


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


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


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


Really impressed and my husband??s back ache has improved So much.


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


really comfy and provide enough support, highly recommend


Its rock hard. Exactly as described.Super fast delivery.


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


Firm mattress with great support and no pressure points


Love the mattress, they are so good and comfortable.


Excellent mattress, great support to the back.


Great all over, I hope itll last a few years


Can??t use it and you won??t take it back


Hardest mattress you will ever sleep on.


Hard and comfortable just like I wanted


No role to and lovely lay on


Done wonders for my back!


Much firmer than expected


Fast and friendly delivey


It is very good for kids


Exactly as described.


Better to sleep onYes

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