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19 October 2020

Top 10 mattresses for 2020

We reveal our pick of the best mattresses available to buy, based on the results of our impartial rigorous lab tests.
A woman asleep in bed
BS
Ben Slater

With the quality of your sleep and the support of your spine at stake, do you really want to risk spending a fortune on an unsupportive mattress that won't stand the test of time?

Well, fortunately you don't have to. Our independent and rigorous lab tests have uncovered the best mattresses – and exposed the worst. With more than £500 separating our cheapest Best Buy mattress from our most expensive Don't Buy, a good night's sleep might cost less than you expect.

Whether you’re looking for a pocket sprung or memory foam mattress, you'll want to take a look at our recommendations below. We’ve picked out the highest- and lowest-scoring mattresses that are available to buy in 2020, so you can be sure of buying the best and avoiding the worst. 

All of our top 10 mattresses below performed well in our tough body-support and durability tests. But you should always try out the mattress in a shop if you can, because that’s the only way to know whether you will personally find it comfortable

Only logged-in Which? members can view our recommendations in the table below. If you're not yet a member, join Which? to get instant access.

The 10 best mattresses in our tests

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81%
Best Buy
£849.00
Reviewed

As far as we’re concerned, this pocket sprung and memory foam hybrid is the best mattress money can buy right now. It provides good support whatever position you sleep in; it’s excellent at preventing the transfer of movement from one side of the bed to the other; and you can sleep safe in the knowledge that it will stand the test of time without sagging, softening or becoming less supportive.

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80%
Best Buy
£649.00
Reviewed

This mattress is a trendy, bed-in-a-box that’s only available online. But don’t let that put you off - there’s a 100-night trial period, during which you can send it back for a full refund if you don’t find it comfortable. If you do like the feel of it, though, you can sleep safe in the knowledge that you’ve bought an exceptional mattress. It's supportive, won’t sag or soften with time and, unlike some foam mattresses, this one doesn’t restrict your movement at all. That's why it's one of the best mattresses we've tested.

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80%
Best Buy
£400.00
Reviewed

If you’re looking for a foam bed, you can’t go far wrong with this reasonably-priced mattress. It didn’t do poorly in a single one of our tests - it’s supportive, breathable and suitable for light sleepers and it will stay that way for years to come.

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79%
Best Buy
£599.00
Reviewed

This mattress is a great all-rounder with no major flaws, but it's particularly well-suited to light sleepers and people who usually sleep on their back. It's also extremely durable and exceptionally stable, meaning you shouldn’t be disturbed when your partner rolls over or gets up during the night. It's not the easiest to turn on though so if you like to move around while getting comfortable then you may want to choose another option.

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77%
Best Buy
£544.00
Reviewed

We first tested this mattress in 2015, and it was one of the best we had seen in years. More than four years on, we’re still yet to test a pocket sprung mattress that can match this Best Buy. This mattress contains several layers of foam, which may not be to everyone’s liking, but you’re in luck if you like the feel of it in the shop. You can sleep well in the knowledge that this mattress will support your spine for years to come without sagging or softening. It’s also a good bet for both restless and light sleepers because, while it’s very easy to turn on, it also does a great job at absorbing bounces.

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77%
Best Buy
£449.00
Reviewed

This pocket sprung and foam combination mattress really impressed in our tests. It's supportive, stable, breathable and easy to turn on. It also gets five stars across the board in our durability testing, so you can be confident that even after years of use, it will be just as supportive as when you first unwrapped it and that it won't sag or soften.

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76%
Best Buy
£539.99
Reviewed

Despite being tested back in 2017, this is still a decent mattress. It’s just as long-lasting as other mattresses in this top 10, although that one is slightly more suitable for light or restless sleepers, this one offers slightly superior support for your spine and will continue to do so for years to come.

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76%
Best Buy
£525.00
Reviewed

If you’re after a good night’s sleep, this mattress will give your spine excellent support if you sleep on your back and good support if you prefer to snooze on your front or side. It won’t sag over time, either. This great mattress scores highly across the board.

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76%
Best Buy
£199.00
Reviewed

We’ve seen cheaper Best Buys than this, but never before have we seen such a reasonably-priced mattress score so highly in our tough tests. It provides good support for everyone but it’s truly exceptional for people sleeping on their back. It’s also easy to roll over on and it won’t dip in the middle or sag, although it will get slightly softer over time.

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75%
Best Buy
£699.00
Reviewed

This memory foam and mini pocket springs mattress is delivered vacuum-packed in a box, direct from the manufacturer to your door. It's incredibly durable and most people will get good support when sleeping on it. It's really easy to turn on this mattress and it's breathable too, so it shouldn't get damp with sweat on muggy nights. It's worth noting that it is on the softer side and was rated as an eight on our softness scale (with one being the firmest and 10 the softest).

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Table last updated on 19 October 2020.

Not found the mattress for you? See all our Best Buy mattresses recommendations.

The worst mattresses to avoid

Even if you find these mattresses fantastically comfortable when you try them in the shop, we would advise against adding them to your short list. Comfort doesn't guarantee support or durability, and all three mattresses have serious flaws in at least one of these areas.

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44%
Don't buy
£199.00
Reviewed

Despite coming from a well-respected brand, you'll want to think twice before buying this mattress. It provides poor support for people sleeping on their back and, over time, the support for back-sleepers becomes even worse while the mattress also sags dramatically.

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44%
Don't buy
£549.00
Reviewed

Pocket sprung mattresses with natural fillings can be very expensive, so this option is temptingly priced. But it’s not the bargain it might seem. Not only is this mattress unsupportive for most people, but it will also sag very noticeably after you’ve been using it a while, which is likely to make it less comfortable.

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Table last updated September 2020.

How we independently test mattresses

Not only does no one else test mattresses like us, but we’re also totally independent, so you can have complete confidence in our results.

If you tend to sleep on your back, a good mattress will keep your spine in the same shape as when you’re standing. So, we measure the shape of a person's body at 36 different points when standing, and then again when lying on their back on the mattresses, to see how well they compare. If you’re a side-sleeper, your spine should be parallel to the mattress, so we use a laser to measure the angle of a person's spine relative to the bed. Are you a front sleeper? We also measure the spine a third time to assess how supportive each mattress is for people who prefer to lie on their front.

After simulating several years of use by rolling a heavy barrel over the mattress thousands of times, we then repeat the body-support tests to see whether the mattress becomes less supportive over time.

That’s not all. With our results, you can see how breathable a mattress is, how easy it is for you to turn over on and how stable it is. If you’re a light sleeper, you should try and buy a mattress with five stars for stability. These are the best at absorbing bounces, so you’ll be less likely to be disturbed when your partner rolls over or gets up in the night.

If you’re not yet a Which? member and want access to all these results and more, join Which? now.

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