When you click on a retailer link, we may earn affiliate commission, which helps fund our not-for-profit mission. This tracks your activity using third party cookies. By clicking a link you are consenting to this.
Use our expert mattress buying advice and trusted Best Buy recommendations to choose the best mattress for your home.
Whether you want a pocket sprung or memory foam mattress, our rigorous, independent lab tests have found big differences between the worst and best mattresses of each type. Make the wrong choice and you risk being lumbered with a needlessly expensive mattress that's uncomfortable and unsupportive, or one that starts out well, but sags before the eight to 10 years we expect a mattress to last.
Although mattresses can be expensive, some of our Best Buys start at less than £200 – so a good night's sleep might cost less than you expect. Read on to find out which mattresses were a dream in our testing, and which ones we uncovered as a nightmare you'd want to avoid.
To see the full list of all the mattresses we've tested go to our mattress reviews.
Here's our pick of the top Best Buy mattresses, including the cheapest mattresses we've seen that sailed through our tough testing.
Join Which? to get access to all our Best Buys and mattress reviews. We've tested hundreds of mattresses from brands including Emma, Ikea and Silentnight, but only the very best are Best Buys
Use our mattresses reviews to find the right Best Buy for you.
See our best cheap mattress recommendations.
See our best memory foam mattress recommendations.
See our best pocket sprung mattress recommendations.
See our best boxed mattress recommendations.
Watch our video to help you pick the perfect mattress for your sleeping position, body shape and bedroom.
There are four main mattress types to choose from: memory foam/foam, pocket sprung, open coil springs, and latex. You'll also find hybrid mattresses made from a combination of foam and springs.
Most mattress manufacturers make more than one type, and the manufacturing process and cost will be different for each.
Mattresses of all types have impressed in our tough tests, so the type you choose really comes down to personal preference and how much you want to spend.
If you want a traditional mattress with a natural filling, such as wool, go for pocket sprung.
Mattresses with spring systems are usually padded with synthetic polymers, but some contain natural fibres such as horsehair or wool. These layers can affect firmness and breathability, both of which we test in every mattress. But more layers aren’t always better – the support from the springs is more important.
With springs, it's quality rather than quantity that matters. We've tested mattresses with densities ranging from 440 to 1,085 springs, and found wide variation in the level of support offered.
Our expert tests have uncovered great pocket sprung mattresses at a range of prices. Go to our best pocket-sprung mattresses guide to see which ones we recommend.
Memory foam mattresses, also known as memory mattresses, are topped with a layer of temperature-sensitive viscoelastic material (memory foam).
This makes the shape of the mattress change to fit the shape of your body, and also tends to make the mattress feel warmer.
You'll find everything you need to know about this increasingly popular type of mattress in our guide to the best memory foam mattresses.
These mattress are fairly basic. Continuous coil mattresses are usually made from a single, looped wire, while open coil mattresses are made of single springs fixed together by one wire.
When we surveyed Which? members to find out more about mattresses, those who own an open coil mattress are less likely to say it helps them to get a good night's sleep than those who own other types.
You can find out more with our open coil mattress reviews.
Latex is a less common type of mattress that has a core made up of layers of springy latex.
Dunlopillo specialises in latex mattresses, although the Dunlopillo mattresses we've reviewed don't come cheap.
These are mattresses that you buy online and they come vacuum-packed into a box delivered direct to your door.
By cutting out the retailer and selling direct from manufacturer to consumer, many brands claim you’re getting a higher-quality mattress for less.
Most online-only mattresses come with a sleep trial. Some start at 40 nights and go up to as long as a year. During this time, you can try the mattress at home and send it back if you don’t like it. In most cases, the manufacturer will collect the unwanted mattress from your home free of charge before recycling it or donating it to charity.
Bed-in-a-box mattresses can be available in all types – foam, or memory foam, but also hybrid mattresses (combining foam and springs).
See our guide to the best bed-in-a-box mattress.
These mattresses come rolled-up and vacuum-packed in a bag, so you can take them home with you. Alternatively, they can be delivered to your home and easily taken to the room you need without having to try to drag a large mattress up your stairs or around tight corners.
However, like bed-in-a-box mattresses, they sometimes need to be aired or left for a fair few hours to regain shape.
As the name suggests, only one side of a one-sided mattress is designed to be slept on. Mattresses can be extremely heavy – the heaviest we've seen weighs more than 50kg – so you might be relieved that you don't need to flip it.
You'll probably still need to rotate it from head to toe, though, so it's a good idea to check the ease-of-use rating in our mattress reviews. This will tell you if a mattress is difficult to move.
Many pocket-sprung mattresses contain layers of synthetic fillings, such as foam. If you're keen to avoid these, look out for mattresses that are specifically claimed to be made using only natural materials such as wool, coconut coir or cotton.
Look carefully at the claims, though, and our reviews, as some might only have a token layer of natural materials.
Contrary to popular belief, our tests have shown that a mattress doesn’t have to be hard to be good for you. Firmness comes down to personal preference, as long as it does a good job of supporting your body.
Firmness is subjective, and manufacturers describe the firmness of their mattresses in a range of ways. That's why we don't rely on terms such as soft and firm in our reviews. Instead, we test mattress firmness on a scale of one to 10, where one is the firmest and 10 the softest, so you can easily compare the firmness of different mattresses.
We also measure how supportive each mattress is for a range of different body sizes and sleeping positions, so whether you prefer to sleep on your front, side or back, we've got you covered.
Medical-sounding terms, such as ‘orthopedic’ and ‘posturepedic’, don't necessarily mean a mattress is better for you. There are no restrictions on the term 'orthopedic mattress', so any mattress manufacturer can use that description. The body support rating we give in our reviews shows how well each mattress keeps your spine in its natural position.
How much you pay will depend on what type of mattress you want.
A basic open coil mattress can start at less than £100, while a handmade, hand-stitched pocket sprung mattress crafted from natural materials such as horse hair, coconut fibre or wool can cost well over £1,000.
Whatever your budget, our expert tests have uncovered a selection of Best Buys for you, with some costing less than £200.
Factors such as brand, size and the types of material used can all have a significant impact on cost. But our mattress tests have found that you don’t need to spend a fortune to get a mattress that will support your spine and that will last for years.
More than three quarters of mattress-owning Which? members sleep on either a king-size or a double mattress, and that’s been the case for several years.
No matter how much you like the idea of stretching out on a huge new emperor mattress, you need to consider how the bed will look in your bedroom. A huge bed in a small bedroom can look out of place, as can a small bed in a huge room.
A ratio of around 1:3 between bed and bedroom is sometimes said to look best, but depending on the size of your bedroom that can be difficult in practice. Following this advice would mean, for instance, that for a king-size bed (1.5 x 2 metres) you'd need a 6 x 8-metre bedroom. At the very least, you should aim for a space of 30 inches between the sides and bottom of the bed, and the nearest wall or piece of furniture.
Adult mattresses come in 10 different sizes. This should make it easier to buy a mattress that's just right for you, but it also increases the risk of buying a mattress only to find it doesn’t quite fit your bed frame or bed sheets.
If you buy the mattress and base separately or are going to keep your old base, measure carefully to make sure they’re a good fit.
The table below shows the full range and dimensions of adult mattresses available to buy in the UK:
|Name||Size (metric)||Size (Imperial)|
|Small single mattress||75cm x 190cm||2ft 6in x 6ft 3in|
|Single mattress||90cm x 190cm||3ft x 6ft 3in|
|Euro single mattress||90cm x 200cm||3ft x 6ft 6in|
|Small double mattress||120cm x 190cm||4ft x 6ft 3in|
|Double mattress||135cm x 190cm||4ft 6in x 6ft 3in|
|Euro double mattress||140cm x 200cm||4ft 9in x 6ft 6in|
|King-size mattress||150cm x 200cm||5ft x 6ft 6in|
Confused by Ikea mattress sizes? You’re not alone, as Ikea sells both double mattresses and Euro double mattresses.
If you bought a bed from Ikea some time ago, you might have a European double, so before you buy a new mattress, it’s worth checking what size Ikea bed you have. The mattresses are sometimes listed separately on the Ikea website, so try searching by mattress name and then check you’ve chosen the correct size mattress for your bed.
On some mattress pages on the Ikea website, there’s a ‘choose size’ box, so make sure you select the correct size here before buying. All the Ikea mattresses we test are standard UK double mattress size (135cm x 190cm), but the thickness can vary.
See our Ikea mattress reviews.
Where you choose to buy your mattress will depend on whether you want to try before you buy. We've listed some options below, but before you head to the shops (or online) check out the best mattress shops in our latest customer survey.
If you'd like to try a selection of mattresses in store before you buy:
If you're happy to try out your choice of mattress at home:
To find out more about mattress returns, see how to return a mattress.
Buying a mattress online might be cheaper and more convenient, but unless you’re buying a bed-in-a-box or a rolled up mattress, it’s always best to try before you buy if you possibly can. A good shop shouldn't mind you doing this.
When trying out a mattress in-store, wear comfortable clothing and remove your outdoor gear. Lie on a mattress for at least 10 minutes, in positions you normally sleep in and trying turning over.
If you can't get to the shops, however, here are our top tips for buying online:
Read our guide to the best mattress shops.
No one else tests mattresses like we do. And we’re 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.
A front-sleeper? We 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.
To find out more about the lengths we go to testing mattresses, see how we test mattresses.