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Rock Hard Super Firm Foam Mattress

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Looking for an extremely firm, super-supportive mattress? Your search is over! One of our firmest mattresses has arrived - and it's perfect if you love a sturdy, more solid feel.

Reasons to Buy

Reflex Foam
Reflex Foam

Supportive foam that promotes spinal alignment and a personalised sleeping experience by moulding to your body. It is durable and resilient and it holds its shape for an extended period of time.

Orthopaedic support
Orthopaedic support

Helping to promote a healthy sleeping position. Orthopaedic support is specially designed to provide enhanced spinal alignment, joint support and improve posture.

Hypoallergenic
Hypoallergenic

Free of allergens for a cleaner, healthier sleep. No allergenic materials were used so you can enjoy an undisturbed rest without the risk of allergy reactions or respiratory problems.

Knitted cover
Knitted cover

A sumptuously soft finish that provides additional cosiness and warmth. Knitted covers enhance airflow and are incredibly breathable. So, you can enjoy a cooler snooze.

Removable cover
Removable cover

Removable covers are convenient and keep mattress maintenance simple. Easily remove the cover and wash to preserve the mattress quality.

Extra Firm
Extra Firm

Our firmest rating. Highly supportive with a very firm, sturdy feel

23cm deep
23cm deep

About 9.1 inches deep. Depth is an important factor when buying a mattress as it can affect the suitability for particular bedding, mattress toppers and bed frames.

Rolled-up
Rolled-up

A rolled-up mattress is efficiently packaged for easy manoeuvring. Because of its smaller, compact design, less delivery vans are needed, providing a great environmentally-friendly option.

Single-sided
Single-sided

With a single-sided mattress, there's no need to flip. Simply rotate every few months to care for your mattress. Fuss free mattress maintenance!

10 Year Warranty
10 Year Warranty

For your peace of mind

Handcrafted in the UK
Handcrafted in the UK

Expertly handcrafted in the UK. This product helps to support our economy and helps to reduce environmental impact.

Fire Resistant
Fire Resistant

This product conforms to BS7177: 2008, for use at home

National Bed Federation Approved Brand
National Bed Federation Approved Brand

For the highest standards of quality and safety

Description

Looking for one of our firmest mattress ever - without paying over the odds? You've found it! The Rock Hard Super Firm Mattress is exactly what it says it is - exceptionally firm!

Firm support

Perhaps you'd rather sleep on a hard floor than your current mattress? Whilst this mattress isn't made from solid wood, it's a pretty good alternative!

It really is one of the firmest mattress we've ever tested. Expertly crafted from a full, solid and highly durable foam block, this springless mattress is consistently super-firm across the entire surface. If you are looking for an even firmer mattress, check out the Rock Hard Ultra Firm mattress from the same collection!

Orthopaedic support

Say goodbye to your soft, saggy mattress - and say hello to a brand-new, refreshingly extra firm, highly supportive feel.

The results will speak for themselves. You'll get total, full-body, orthopaedic support from head to toe. You'll wake feeling well-rested and brighter each morning - and ready to take on your day.

Easier to care for

Single-sided for easier care, there's no need to flip your mattress over. Simply rotate it every three months.

Peace of mind

This great-value, British-made mattress comes complete with a superb 10 Year Warranty. Please note: the cover carries a 1 Year Guarantee.

Great sleep can be yours!

For a firmer feel and high levels of care and support for your back - choose the Rock Hard Super Firm Mattress and enjoy a simply better night's sleep, every night.

Benefits

  • One of our firmest mattresses ever!
  • 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
  • Single-sided for easier care
  • Depth: 23cm
  • 10 Year Guarantee
  • Cover is guaranteed for 12 months
  • Made in the UK

60-Night Comfort Trial

This mattress comes with a 60-Night Comfort Trial - like all of our mattresses!

The trial lets you test your mattress for up to 60 nights. If it's not quite right for you, you can exchange it for a new one.

It can take some time to get used to a new mattress, which is why we ask you to sleep on your mattress for 30 nights. If you're not happy with the feel after 30 nights, simply contact our Customer Service Team, and we'll arrange a mattress exchange.

Click here for more info about our 60-Night Comfort Trial.

Specification

FirmnessExtra firm
Support systemReflex Foam
Back careOrthopaedic support
CoverKnitted cover
Allergy careHypoallergenic
Rolled-upYes
Single-sidedYes
Product careRemovable cover
Warranty10 years
Awards & accreditationsHandcrafted in the UK, Approved by the National Bed Federation
Fire resistanceConforms to BS7177: 2008, for use at home
DownloadsRock Hard Mattress Product Care and Guarantee

Dimensions

SizeWidthLengthDepth
Single90cm190cm23cm
Small Double120cm190cm23cm
Double135cm190cm23cm
King Size150cm200cm23cm
European King Size160cm200cm23cm
Superking180cm200cm23cm
Emperor200cm200cm23cm

Please allow for a tolerance of +/- 2cm

Delivery

The following delivery methods apply to mainland England and most of Scotland, Wales and Northern Ireland. Please read our delivery page for more information.

Next day delivery (weekdays only)

Order before

FREE

Weekday of your choice

Order up to 60 days ahead

FREE

Weekend

On Saturday or Sunday of your choice

£17.50

Delivery to the front door of your building

Free upgrade for Superking and Emperor to your room of choice

Yes

Two-hour delivery time slot

We’ll let you know on the day before your delivery

Yes

Call to let you know we’re on our way

On your delivery day

Yes

Delivery to your room of choice

Free upgrade for Superking and Emperor

£20.00

Mattress recycling

We'll take away your old mattress

£35.00

Delivery is on an all-day service, 7am - 8pm for mainland England and most of Scotland, Wales and Northern Ireland.

Need further information? Please visit our Delivery page.

Reviews

4.7/5

out of 350 reviews onTrustpilot logo

Product review stars

Customer Reviews Summary

summarised by AI

5 starsTrusted Customer
23 February 2026

Verified Purchase

5 starsSonia
13 February 2026

Verified Purchase

4 starsMiriam
4 February 2026

Verified Purchase

5 starsAled
22 January 2026

Verified Purchase

5 starsMr Ahmdd
21 January 2026

Verified Purchase

4 starsUtip
18 January 2026

Verified Purchase

4 starsMr Araujo
2 January 2026

Verified Purchase

5 starsD Tazo
31 December 2025

Verified Purchase

5 starsJohn
19 December 2025

Verified Purchase

5 starsDebarati
16 December 2025

Verified Purchase

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