Best medium firm mattresses
Medium firm is the most recommended firmness in Britain and the least meaningful, because a stated rating is relative to the person lying on it.
I earn a commission if you buy through some links on this page. It never changes what I recommend, and I publish negative verdicts on brands I earn from. Editorial independence.
Medium firm is the default recommendation for good reason. It suits back sleepers, most combination sleepers, and the broad middle of the population by weight and position.
What the label does not tell you is that firmness ratings are not absolute. A mattress supports you by compressing until the resistance it generates matches your weight, so the same mattress is a different object to different people.
A ten stone sleeper reaches that point in the first few centimetres and experiences a rated 7 as firm. An eighteen stone sleeper compresses considerably further and experiences the same mattress as soft. Both are describing it accurately.
The picks
The pick, if you want one answer
Origin Hybrid Pro Mattress, 8.4 / 10. The strongest general specification in Britain at a price where competitors sell considerably less, and sits squarely in the medium firm band.
| Product | Best for | From | Score |
|---|---|---|---|
| Origin Hybrid Pro Mattress | Best overall | £374 | 8.4 / 10 |
| Otty Original Hybrid Mattress | Best if you sleep hot | Around £500 | 8.1 / 10 |
| Silentnight Sofia 1200 Mirapocket | Best if you are unsure | Mid range | 7.2 / 10 |
| Mlily Premier 2000 | Best value | Budget to mid | 7.2 / 10 |
| Emma Original Lite Mattress | Best under £200 | £199 | 7.3 / 10 |
Origin Hybrid Pro Mattress: Best overall
£374 · 8.4 / 10
Scores 8.4, the highest of any mattress reviewed here. Medium firm is the firmness most people should buy, so the useful question is not which mattress is most medium firm but which is the best mattress in that band. This is it.
Buy it if
You are of average build and want the strongest construction per pound.
Do not buy it if
You are heavier and want maximum depth. Step up to the LumbarCloud.
Read the full Origin Hybrid Pro Mattress review
Otty Original Hybrid Mattress: Best if you sleep hot
Around £500 · 8.1 / 10
A 16 centimetre spring core, which is a support structure rather than a thin comfort layer of springs. Heat leaves a mattress when air moves through it, and that is a large volume of open gaps flexing with every movement.
Buy it if
You want medium firm with a genuine structural answer to heat.
Do not buy it if
You want to sink in.
Read the full Otty Original Hybrid Mattress review
Silentnight Sofia 1200 Mirapocket: Best if you are unsure
Mid range · 7.2 / 10
Zoned 1,200 pocket springs plus a 60 night comfort exchange buying direct. That is the single most useful feature on this page, because medium firm is where people most often misjudge by one step in either direction, and exchanging is better than returning.
Buy it if
You think medium firm is right and want to be able to change your mind properly.
Do not buy it if
You are over about sixteen stone.
Read the full Silentnight Sofia 1200 Mirapocket review
Mlily Premier 2000: Best value
Budget to mid · 7.2 / 10
Two thousand springs is where every spring is still doing meaningful work and none has been thinned to make room for the next. Medium firm does not need the very high counts a plush surface requires, so this is the sweet spot rather than a compromise.
Buy it if
You want the spring count most people should actually be buying.
Do not buy it if
You want a plush surface or very fine contouring.
Read the full Mlily Premier 2000 review
Emma Original Lite Mattress: Best under £200
£199 · 7.3 / 10
A three-zone pocket spring layer at £199 with a 200 night trial. Zoning gives you medium firm behaviour that varies along the mattress rather than a single compromise across it.
Buy it if
You want zoned medium firm support on a budget.
Do not buy it if
You are heavier than about fifteen stone.
Read the full Emma Original Lite Mattress review
Read the number against your own weight
| Build | Experienced as | So buy |
|---|---|---|
| Under 10 stone | Firmer than 7 | A rated 5 to 6 to get a medium firm experience |
| 10 to 15 stone | About as stated | 6 to 7. Ratings are set for this range. |
| Over 15 stone | Softer than 7 | 7 to 8, with 30cm or more of depth |
Depth matters alongside the rating for heavier sleepers, because a firm surface over a shallow mattress is not the same thing as a firm surface over 30 centimetres of structure.
Who medium firm suits, and who should look elsewhere
Back sleepers. The strongest case. The hollow under your lower back needs a surface that fills it rather than bridging from shoulders to hips, and medium firm is where that sits.
Combination sleepers who change position through the night, because it is the firmness that fails least badly in any of them.
Couples of similar build, where it genuinely is a shared middle rather than a compromise neither of you wants.
Look elsewhere if you are a dedicated side sleeper, who generally wants 4 to 6 so the shoulder and hip can sink; a front sleeper, who wants 7 to 9 so the hips do not drop and arch the lower back; or much heavier than your partner, where the answer is dual firmness rather than a number between you.
Two free checks that beat choosing a number
Where you ache on waking. Lower back ache that eases once you move around usually means too soft. Hip or shoulder pain when side sleeping usually means too firm. That is more reliable than any rating, because it measures the actual outcome.
The hand test, if you sleep on your back. Lie on the mattress for ten minutes, then slide a flat hand into the gap under your lower back. Slides in easily with room to spare means too firm. Cannot get it in at all means too soft. Snug is right.
And before buying anything, check the pillow height, measure the mattress for a dip over 25 millimetres, and measure your slat gaps. All three commonly produce discomfort blamed on firmness.
What not to buy
Medium firm as a compromise between two people of very different weights. You will both be wrong. Dual firmness or a zip-and-link solves it structurally.
A rated 7 if you are under ten stone. It will behave like a firm mattress for you.
A cheap medium firm mattress that is soft at the surface. Softness needs spring count to work, and at budget prices you cannot have both.
A medium firm mattress without a trial, if you are uncertain. This is the band where people most often misjudge by one step.
Also considered, and why they are not here
A roundup is only as useful as what it leaves out, so here is what was assessed and rejected for this list.
| Product | Why it is not on the list |
|---|---|
| Simba Hybrid | Aerocoils are a 25mm comfort layer over a foam base, which is a different construction from a deep spring core at similar money. |
| Nectar Premier Hybrid | The 365 night trial is the longest in the UK mainstream and the best reason to buy it. On construction alone, others give you more per pound. |
| DreamCloud Luxury Hybrid | Sound, and it shares a parent company with Nectar so their promotions move together. Compare against Otty at the same money. |
| Inofia Elegant Plus | Good depth and a spring core at budget money. The trading history is shorter than the guarantee, which matters on a main bed. |
| Otty Extra Firm | Excellent, and it sits a full band above medium firm. Right for heavier sleepers and front sleepers, wrong for this list. |
How this list is made, and who made it
Independence
No brand pays to appear on this site and no placement is sold. Some links earn a commission if you buy, which never changes a score, an order or a verdict. Several of the lowest scores here are on products that carry commission, and several recommendations carry none.
Who writes this. Kyle Klinkradt has worked in the mattress and bedding industry for over ten years across retail, distribution and brand partnerships, and has handled, sold or assessed products from every major UK bed-in-a-box brand. Every review on this site is written by one person, so the scores mean the same thing from page to page.
What the assessment is. Construction specifications against what they physically do: spring height and where in the mattress it sits, spring count for the size, gauge, whether the base is sprung or foam, foam density where it is published, comfort layer depth and material. Then the commercial terms that decide what you are actually buying: trial against returns policy, guarantee length against the company's UK trading history at Companies House, and the regulatory record.
What it is not. This is not a laboratory. I do not publish pressure-mapping data or claim to have slept eight years on every mattress here, because nobody has and pages that imply otherwise are not telling you the truth. Where a judgement rests on construction rather than long-term use, the review says so.
What gets a product removed. Leaving the UK market, a specification change that makes the review inaccurate, or a corrected fact. Brands that have withdrawn are kept on the site with the score removed rather than quietly deleted, because people still search for them.
See editorial independence, corrections and the author page.
How these were chosen
Every product here has its own review on this site with a score out of 10, and the score is a judgement rather than an average. Nothing appears in a list because it pays more.
A score is against the market, not against its own range. The cheapest mattress in a lineup is usually priced to make the model above it look reasonable, and the flagship of a budget range has risen into a bracket where better brands compete. Both are judged against what else you could buy for the money.
Everything listed can actually be bought in the UK. That is not a given: Casper withdrew in July 2020 and Leesa no longer sells here, and both still appear in current British roundups with affiliate links attached.
I do not pad the list. Where only three or four products genuinely qualify, there are three or four. A list of seven when the category contains four good ones is a list with three bad recommendations in it.
Prices move constantly. Judge the cash price on the day rather than any percentage beside it. See every review on this site or where the real savings are.
Questions people ask
What does medium firm mean on a mattress?
Usually 6 or 7 out of 10, and the rating is relative rather than absolute. A mattress compresses until its resistance matches your weight, so under ten stone a rated 7 feels firmer than 7 and over fifteen stone it feels softer.
Is medium firm right for most people?
For back sleepers, combination sleepers and couples of similar build, yes. Dedicated side sleepers generally want 4 to 6 and front sleepers 7 to 9, so medium firm is a default rather than a universal answer.
Should a couple buy medium firm as a compromise?
Not if your weights differ substantially, because you will both be wrong. A dual firmness mattress or a zip-and-link solves it structurally rather than averaging two different needs.
How do I tell if my mattress firmness is wrong?
Where you ache on waking is more reliable than any rating. Lower back ache that eases once you move usually means too soft; hip or shoulder pain when side sleeping usually means too firm.