Updated 26 March 2019: The version of the Casper mattress we tested in 2018 is no longer available, but you can read our expert preview of the new Casper Original mattress below. Alternatively, go straight to our full review of the new Casper Essential Mattress.
Our mattress group test has pitted Casper – ‘the internet’s favourite mattress’ – against some of the biggest high-street brands.
We’ve awarded three mattresses our coveted Best Buy recommendation, each of which have been proven in independent Which? tests to provide exceptional support for your spine for years to come.
But others, some of which cost well over £1,000, failed to live up to our expectations.
Most people use their mattress for at least eight years, so don’t risk buying a mattress that will keep you up at night. See our full list of the best mattresses for 2019.
Casper mattress: what’s all the fuss about?
Given the way it’s marketed, you’d be forgiven for thinking that the Casper mattress is made from a revolutionary new material. In fact, it’s made from a combination of different densities of foam and memory foam.
But there’s still a lot to like about it. For starters, it’s delivered to your door free of charge. The firm behind Casper will even pick it up for free and issue a full refund if you decide you don’t like it within the first 100 nights.
At £575 for a double, the price is also pretty reasonable. By selling direct to shoppers rather than through high street shops, Casper says it can keep its costs down.
It all adds up to a tempting offer, especially as the previous version of the Casper mattress impressed in our tough support and durability tests. But Casper has redesigned its mattress, so we’ve sent the latest version to our test lab to find out whether it measures up to the original. We’ll have test results for the new Casper in June 2019, but you can read our expert Casper mattress preview in the meantime.
Alternatively, see how we rated the Casper’s Original’s cheaper sibling in our Casper Essential Mattress review.
Find out how Casper fared in our run down of the best mattress brands of 2018 in our guide to Casper mattresses
How high street mattresses compare
Despite the convenience of internet mattresses, there’s still a lot to be said for buying your mattress on the high street. There’s more variety and you can try out several mattresses in person before parting with your money.
But buying a reputable brand of brand of mattress from a reputable retailer doesn’t guarantee that a mattress will meet your needs. That’s why we test the mattress support on all sorts of people, whether you’re small or large and sleep on your back or side. Many mattresses are supportive when new, but either struggle to maintain that support, or else start to sag or soften with time.
We’ve just tested some of the big-name mattresses you might spot in shops – make sure you find out how they performed in our tests before you seek them out.
John Lewis Ortho Absolute 1400: £699
If you’re looking for a firm pocket-sprung mattress, you may want to consider this one from John Lewis. It’s one of the firmest we’ve tested – in our firmness tests it was measured as a two on a scale where one is the firmest and 10 the softest.
As a result, you can expect it to be easy to turn over on, without sucking you in or restricting your movement. But if that also means it’s not so good at absorbing impact, light sleepers will want to look elsewhere, or risk being disturbed every time their partner rolls over.
Read our full John Lewis mattress review to find out whether it’s stable and durable enough to be worth adding to your shortlist.
Dunlopillo Millennium: £1,315
Looking for a mattress that moulds to the shape of your body but isn’t made of synthetic materials? The Dunlopillo Millennium could be the answer.
It’s far from cheap, but it’s made entirely from natural latex, which Dunlopillo says is supportive, breathable, durable and hypo-allergenic.
You need to regularly rotate this 46kg mattress from head to toe, which we found challenging to say the least. But that might be a price worth paying if those claims ring true.
Read our full Dunlopillo mattress review for our verdict.
Sealy Napoli 1400: £749
This Sealy mattress is a bit of a mixture, in that it contains layers of pocket springs, foam and latex.
The result is a one-sided mattress that feels warmer to lie on than most – perfect if you tend to feel cold during the night. But a mattress this warm also needs to be breathable to ensure the fabric doesn’t become damp with sweat.
Read our full Sealy Napoli 1400 mattress review to see how it stacks up.
Which? mattress reviews
Click on the links below, or head to our mattress reviews to see everything on test.
Dunlopillo Orchid (latex) – £1,315
Harrison Emerald 10700 (pocket sprung) – £1,349
Sleepeezee Megafirm 2000 (pocket sprung)- £599
Slumberland Gold Seal (pocket sprung) – £1,099
Somnus Marquis Supremacy (pocket sprung – £2,069
Vispring Herald Superb firm (pocket sprung) – £2,515