Best mattress for heavy people
The single most common mistake here is buying a higher spring count, which is close to the opposite of what a heavier body needs.
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A mattress supports you by compressing until the resistance it generates matches your weight. So a heavier sleeper compresses further, reaches layers a lighter person never touches, and experiences a stated firmness as considerably softer than the label implies.
The instinct is to buy more springs. That is backwards. Above about 2,000 springs in a king, manufacturers raise the count using thinner gauge wire in smaller units: you gain contouring and motion isolation and you lose individual spring strength.
What you want is fewer, stronger springs, more depth, and a firmer build.
The picks
The pick, if you want one answer
Rem-Fit 4000 Ortho Elite Hybrid Mattress, 7.6 / 10. A genuinely firm build with reinforcement where firm mattresses usually give way, and the highest support score on this site.
| Product | Best for | From | Score |
|---|---|---|---|
| Rem-Fit 4000 Ortho Elite Hybrid Mattress | Best overall | Mid range | 7.6 / 10 |
| Otty Extra Firm Hybrid Mattress | Best edge support | Around £600 | 8.0 / 10 |
| Origin LumbarCloud Mattress | Best depth per pound | £797 | 8.2 / 10 |
| Mlily Premier 2000 Ortho | Best value | Budget to mid | 7.4 / 10 |
| Hypnos | Best hand-built option | Premium | 8.0 / 10 |
Rem-Fit 4000 Ortho Elite Hybrid Mattress: Best overall
Mid range · 7.6 / 10
Nine out of ten for support here, the highest on the site. It is one of very few UK mattresses I would call firm without qualification, and Rem-Fit's eligibility schemes are unusually broad, which can change the price materially.
Buy it if
You need firm support with real structure and you want the strongest specification in the category.
Do not buy it if
You are a lighter side sleeper. This will compress your shoulder.
Read the full Rem-Fit 4000 Ortho Elite Hybrid Mattress review
Otty Extra Firm Hybrid Mattress: Best edge support
Around £600 · 8.0 / 10
A 16 centimetre spring core with an extra firm build and reinforced side panels, which most hybrids simply do not have. Edge support is rarely specified and it is the first part of a mattress to go, particularly under more weight.
Buy it if
You sit on the edge of the bed to dress, which is where most mattresses fail first.
Do not buy it if
You want any surface give at all.
Read the full Otty Extra Firm Hybrid Mattress review
Origin LumbarCloud Mattress: Best depth per pound
£797 · 8.2 / 10
Depth is a load specification rather than a quality one, and this is where that matters most. The bottom third of a 35 centimetre mattress does real work for a heavier sleeper and nothing at all for a lighter one. Thirty-five centimetres and up to 8,000 springs at £797 has no UK equivalent.
Buy it if
You compress a mattress far enough to need 35cm of it, and you want value.
Do not buy it if
You are under about eleven stone. The lower third does nothing for you.
Read the full Origin LumbarCloud Mattress review
Mlily Premier 2000 Ortho: Best value
Budget to mid · 7.4 / 10
Firm at 2,000 springs. Two thousand is the point where every spring is still doing meaningful work and none has been thinned to make room for the next, and firm is how you make that count work. A well-built 2,000 spring firm mattress supports a heavier body better than a 6,000 spring plush one.
Buy it if
You want firm support at a sensible price and you are of heavier build.
Do not buy it if
You want fine contouring or a plush surface.
Read the full Mlily Premier 2000 Ortho review
Hypnos: Best hand-built option
Premium · 8.0 / 10
Traditional hand-built pocket springs with natural fillings, built to be turned and to last. If budget allows and someone can help you turn it, this is a different class of construction from anything boxed.
Buy it if
You want British hand-built construction with turnable natural fillings and you can turn it.
Do not buy it if
You cannot turn a heavy mattress. This is a two-person job and the guarantee may require it.
Why more springs is the wrong answer
A spring supports according to its gauge and its height, not according to how many neighbours it has.
A king size mattress is 150 by 200 centimetres, or three square metres. Fitting 8,000 springs into that means roughly one every 1.7 centimetres in each direction, and units that small cannot be made from thick wire and still compress usefully under a human body.
So a very high count necessarily means thin gauge. What you gain is contouring finer than the body needs and excellent motion isolation. What you lose is exactly the property a heavier sleeper depends on.
| Specification | What to look for |
|---|---|
| Firmness | Firmer than the rating suggests. Over about fifteen stone, add a point. |
| Depth | 30cm and above. You will reach the lower layers where a lighter person will not. |
| Spring count | 1,500 to 2,500 in a king. Enough for independent response, not so many that gauge drops. |
| Edge support | Reinforced panels, stated explicitly. Rarely specified and it fails first. |
| Base | Slats no more than about 7.5cm apart, and a centre rail with a leg on a double or larger. |
The base will fail before the mattress does
This is where the money is lost
Most modern mattress guarantees require slats no more than about 7.5 centimetres apart. Wider gaps are a common exclusion, and they also cause the problem: the mattress sags between the slats, producing exactly the impressions the guarantee would have covered.
Under more weight this happens faster and more visibly.
Two further checks that matter specifically here. A centre rail with a supporting leg on a double or larger, because an unsupported centre is where a frame gives way. And on an ottoman base, the gas strut rating against your mattress weight, because a 35 centimetre hybrid can be 50 kilograms or more and struts sized for a lighter mattress will not hold the platform safely.
If you have a frame already, measure the gaps before buying a mattress. A sheet of plywood or a slat conversion costs a fraction of an unclaimable mattress.
Read firmness ratings as relative, not absolute
A stated 7 out of 10 is set for someone between about ten and fifteen stone. Over fifteen, that same mattress will feel closer to a 5 or 6 to you, and give you less support than the number implies.
So add a point to whatever you think you want, and prioritise depth alongside it. A firm surface over a shallow mattress is not the same as a firm surface over 30 centimetres of structure.
And if a clinician has advised a firm mattress, take that advice from them rather than from a product name, and bring the specification rather than the marketing to the conversation.
What not to buy
A 5,000 or 8,000 spring mattress bought for support. That is a plush specification. Fitting that many springs in requires thinner wire, which is the opposite of what you need.
An all-foam mattress. Foam compresses further under more weight and develops body impressions faster. If you want foam's motion isolation, look for published high density, which almost nobody states.
A shallow mattress, however well specified. Under about 26 centimetres you will compress through the comfort layers and feel the base.
Anything sold as orthopaedic without a spring count. The word is not regulated and carries no specification.
A new mattress onto an old frame you have not measured. The most common way this purchase is wasted.
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 |
|---|---|
| Mlily Supreme 10000 | Ten thousand springs in a king is roughly one every 1.7cm, which requires very thin wire. Outstanding motion isolation and the wrong trade for a heavier body. |
| Otty Pure+ 4000 | A genuinely good mattress built for a plush surface. Four thousand springs buys contouring, not strength. |
| Emma Original Lite | Excellent at £199 and there is little support headroom at that price. Fine at average build, marginal above fifteen stone. |
| Nectar Classic Hybrid | The 365 night trial is genuinely valuable, and the construction is mid-market. Buy it for the trial rather than for support. |
| Inofia LUXE | Budget brands lose their advantage at the top of their own range, where Origin and Otty compete directly with more structure. |
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
Do heavier people need more springs in a mattress?
No, stronger ones. A spring supports according to its gauge and height, not how many neighbours it has, and very high counts are achieved by using thinner wire in smaller units. Aim for 1,500 to 2,500 in a king with a firm build and 30cm or more of depth.
How deep should a mattress be for a heavier person?
Thirty centimetres and above. Depth is a load specification: the lower third of a deep mattress does real work for a heavier sleeper and nothing at all for a lighter one.
Why did my mattress sag so quickly?
Frequently the base rather than the mattress. Slats more than about 7.5cm apart let the mattress sag between them, which both causes the impressions and voids most guarantees. A centre rail with a leg matters on a double or larger.
Should I buy a firmer mattress than the rating suggests?
Over about fifteen stone, yes, by roughly a point. A stated firmness is set for someone between ten and fifteen stone, and you compress further, so the same mattress feels softer and supports less than the number implies.