Best cheap memory foam mattresses
At budget prices you can have a genuine spring layer, which makes cheap memory foam a difficult recommendation.
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.
Memory foam has one genuine advantage: motion isolation. There is no mechanical linkage between one part of the surface and another, so a partner's movement does not travel. Nothing sprung matches it.
At the top of the market that advantage is paired with published density, which predicts how long the foam holds its shape. At the bottom it usually is not.
Standard memory foam runs from around 16 to 80 kilograms per cubic metre, with decent comfort layers between 48 and 72. Low density foam can develop body impressions within three to five years, and foam cost is dominated by density, which is exactly why budget brands stay quiet about it.
Meanwhile at the same money, spring mattresses exist. That is the honest problem with this category.
The picks
The pick, if you want one answer
Emma Original Lite Mattress, 7.3 / 10. A genuine spring layer at a price where the foam alternatives will not tell you their density.
| Product | Best for | From | Score |
|---|---|---|---|
| Emma Original Lite Mattress | Best buy at this price | £199 | 7.3 / 10 |
| Ergoflex Review | Best cheap foam that publishes density | Mid range | – / 10 |
| Mlily Memory Gel 500 | Cheapest with reservations | Budget | 5.8 / 10 |
| Silentnight Sleep Now Range | Cheapest sensible mattress of any kind | From £169 | 6.7 / 10 |
Emma Original Lite Mattress: Best buy at this price
£199 · 7.3 / 10
It is the top pick on a cheap foam page because of what it is: a three-zone pocket spring layer at £199, with a 200 night trial.
The naming trap is the point. The Original Lite at £199 has springs. The Original at £369 is all foam. The cheaper model is the hybrid.
Buy it if
You want the best construction available at the bottom of the market.
Do not buy it if
You specifically need foam's motion isolation.
Read the full Emma Original Lite Mattress review
Ergoflex Review: Best cheap foam that publishes density
Mid range
Not the cheapest here, and the only foam brand I know of in the UK that publishes a high density comfort layer, and it has traded since 2006, which is its guarantee period twice over. If foam is the requirement, stretching to this is better value than two cheap mattresses in eight years.
Buy it if
You genuinely need foam's motion isolation and want to know what you are buying.
Do not buy it if
You sleep hot, or the budget stops well below this.
Read the full Ergoflex Review review
Mlily Memory Gel 500: Cheapest with reservations
Budget · 5.8 / 10
Scores 5.8. Included because the category needs an entry and the reservations are the useful part: no published density, no spring layer, and a model number that looks like a spring count and is not. The Memory and Memory Gel collections contain no springs at all.
Buy it if
You need cheap foam for a spare room and you understand the trade.
Do not buy it if
It is a main bed.
Read the full Mlily Memory Gel 500 review
Silentnight Sleep Now Range: Cheapest sensible mattress of any kind
From £169 · 6.7 / 10
From £169, from a manufacturer making beds in Barnoldswick since 1946. Confirm whether the springs are pocketed or open coil if two people will share it, because linked springs move the other side of the bed.
Buy it if
Price is the deciding factor and you are open to springs.
Do not buy it if
Two people share it and the model uses open coil springs.
Read the full Silentnight Sleep Now Range review
The one number that matters, and how to read its absence
| Density | What to expect |
|---|---|
| Roughly 16 to 40 | Body impressions within three to five years. Cheap to make. |
| Roughly 40 to 55 | Reasonable life. The common mid-market bracket. |
| Roughly 55 and above | Holds shape considerably longer. Slower response, and dearer. |
If a listing gives you the depth, the cover material and a name for the comfort layer but not the density, you have been told everything except the thing that predicts how long it will last.
At the cheap end, silence is informative rather than neutral. A brand with a high density layer has a commercial reason to say so.
Why springs win at this price
Two reasons, and both are structural rather than a matter of taste.
Springs move air. Foam has small closed cells and almost no air movement, so heat reaching it stays there. A spring layer is open structure that flexes with every movement.
Steel does not take a set. A pocket spring compresses and recovers many thousands of times. Foam gradually stops recovering, which is what a body impression is.
At £200 you can now have a zoned pocket spring layer, which was not true a few years ago. That is why the calculation has changed rather than because foam got worse.
When cheap foam is still the right call
Three situations, and they are narrower than the category's marketing suggests.
A shared bed where one person wakes the other and the budget genuinely cannot stretch. Motion isolation is real and foam is the cheapest route to it.
A bunk bed or a frame with a low depth limit, where a shallow mattress is required and foam performs better than a shallow sprung one.
A bed used occasionally where nobody will be there long enough for impressions to matter, though note that foam ages with time as well as use, so a spare room actually favours springs.
Spend the difference below the mattress
At this price, the next twenty to forty pounds does more below than above.
A protector, fitted before the first night. A stain voids most guarantees absolutely, and on a cheap mattress that is the difference between a claim and a replacement. Buy a breathable membrane, not a plastic-backed one.
Check the base. Slats more than about 7.5 centimetres apart cause sagging and void most guarantees, and foam is the construction most sensitive to what is underneath it because it conforms to the gaps rather than bridging them.
What not to buy
Foam with no published density, at the cheap end.
A foam mattress over £300 when a hybrid is available for less.
Gel, charcoal or copper infused foam bought for cooling. The treatment addresses the surface and the material still has nowhere to put heat.
Cheap foam if you are over about sixteen stone. You compress further and impressions form faster.
A foam mattress on wide slats. Foam conforms to the gaps; a spring unit bridges them.
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 Memory Gel 200 | Scores 5.5, the weakest in the range. No springs despite the number, and no published density. |
| Memory One | Scores 5.9. Much of the budget foam market is white label from a small number of producers, so comparing brand names at this level tells you very little. |
| Emma Original | All foam at £369 when the Original Lite at £199 has a three-zone spring layer. Difficult to recommend the dearer foam model. |
| Dormeo Memory Plus | Scores 5.9. High list price against near-permanent discounting, which makes the real price hard to judge. |
| Nectar Classic Memory Foam | Scores 6.0. The 365 night trial is genuinely valuable, and the hybrid in the same range gives you springs for similar money. |
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
Is cheap memory foam worth buying?
Rarely, because at budget prices spring mattresses now exist. Emma's Original Lite at 199 pounds has a three-zone pocket spring layer, and springs move air and resist body impressions in a way foam does not.
What density should memory foam be?
Decent comfort layers run between 48 and 72 kilograms per cubic metre, within a range of roughly 16 to 80. Low density foam can develop body impressions within three to five years.
Why do cheap brands not publish foam density?
Because foam cost is dominated by density, so a brand competing on price has nothing to gain by stating it. A brand with a high density layer has a commercial reason to say so.
When is cheap memory foam the right choice?
When one person wakes the other and the budget cannot stretch, since motion isolation is foam's genuine advantage, or when a frame limits mattress depth, such as a bunk bed.