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Emma, Eve or Casper? The top five boxed mattresses for 2020

By Ben Slater

Online bed-in-a-box mattress brands such as Emma, Eve and Leesa make bold claims about their mattresses. But which is actually the best to buy from in 2020?

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Spending a few hundred pounds on a mattress that you haven’t tried out for yourself sounds risky. But our lab tests have revealed that some of the best mattresses money can buy are only available in vacuum-packed boxes that you order online. 

Update: Casper has ceased selling mattresses in the UK as of June 2020.

Known as 'bed-in-a-box' mattresses, we’ve rounded up the top five for 2020 to help you make a decision you’ll be happy with for many years to come.

You can sleep safe in the knowledge that the bed-in-a-box mattresses we’ve recommended below will give your spine the support it needs, without sagging or softening with time. 

While you can't try before you buy with these mattresses, each one is available with a sleep trial of several weeks, during which time you can send the mattress back for an exchange or, in many cases, a full refund. We've also independently tested each of the mattresses below to ensure that we only recommend those that are durable, resist sagging, support your back and are easy to turn.

Read on for our top five bed-in-a-box mattress recommendations, or jump straight to our full round-up of the best mattresses.

Top five boxed mattresses

81%
£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.

80%
£375.00
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.

80%
£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.

79%
£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.

77%
£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.

Table last updated on 30 April 2020.

Bed-in-a-box mattress brands

Want to know more about the brands selling mattresses online? Read on for our round-up of the key information you'll need to know. 

Emma

Emma offers two bed-in-a-box mattresses. The Emma Original is comprised of foam and memory foam, while the Emma Hybrid contains a combination of foam, memory foam and pocket springs.

While the latter is no longer available to buy direct from Emma's website, it is still being sold by a variety of retailers.

  • Costs: Emma Original: Single: £429, Double: £649, King: £699, Super King: £799
  • Delivery: Free shipping and free returns in the UK
  • Trial: 100 nights. If you decide to return the mattress, Emma will collect it free of charge and offer a full refund
  • Existing mattress removal: Available for an additional £35. Pick-up at a separate time after delivery
  • Guarantee: 10-year limited warranty on the mattress core
  • Other products available: pillow, mattress protector, bed base

See our full Emma Original mattress review to see whether it really can offer full support.

Eve

With its bright yellow trim, the Eve mattress is certainly bound to catch your eye. It's made of a 3cm memory foam layer, 3cm cooling foam layer and 18cm supportive foam base.

Eve mattresses are actually on display in various branches of Debenhams, Fenwick department stores and Next Home, so it's worth checking to see if there's a display model near you.

  • Costs: Single: £349, Double: £599, King £699, Super King: £799 (0% APR finance packages are available)
  • Delivery: Free standard 3-day delivery, next-day express delivery available for £10
  • Trial: 100 nights. If you decide to return the mattress, Eve will collect it free of charge and offer a full refund
  • Existing mattress removal: Available for an additional £35 fee, after the delivery of your Eve mattress
  • Guarantee: 10-year limited warranty covering manufacturing faults
  • Other products available: cot mattress, pillow, mattress topper, mattress protector, bed frame, bedding (two bundles available)

See how it performed in our tests by reading our full Eve mattress review.

Leesa

Leesa donates one mattress to a homeless shelter for every 10 it sells, plants one tree for every sale, and donates employee time to community volunteer work, so it pitches itself as an ethical option.

  • Costs: Single: £399, Double: £599, King: £699, Super King: £769 (0% APR finance packages are available)
  • Delivery: Free delivery (4-7 business days)
  • Trial: 100 nights. If you decide to return the mattress, Leesa will offer a full refund
  • Existing mattress removal: No option
  • Guarantee: 10-year limited warranty covering all defects
  • Other products available: Sheet set

See our full Leesa mattress review to discover whether it will really offer you a better night's sleep.

Otty

Otty claims that its patented memory foam/foam/pocket spring combination eliminates over-heating with a cool gel and airflow technology.

  • Costs: Single: £350, Double: £450, UK King £550, Super King: £650 (0% financing available, ranging from 3 months to 12 months depending on the value of the purchase and the retailer)
  • Delivery: Free shipping, £30 for premium shipping including allocated day and Saturday delivery, and free returns
  • Trial: 100 nights. If you decide to return the mattress, Otty will offer a full refund
  • Existing mattress removal: Optional, depending on your area
  • Guarantee: 10-year limited warranty
  • Other products available: Pillow and pet bed

See how it does in our tests, including how breathable the mattress is, by reading our full Otty mattress review.

Silentnight

Silentnight has a bigger range of deliverable mattresses, including pocket-sprung, latex and memory foam options. If you like trying out a mattress before buying, Silentnight is one of the few online mattress brands to be on display in a large number of retailers - including Bensons for Beds, Dreams, Furniture Village and John Lewis.

  • Costs: Doubles range from £125-£729 depending on the model. Its hero boxed model, the Silentnight Studio, costs: single: £349, double: £599, King: £699, Super King: £799 (flexible 0% financing available)
  • Delivery: Free 14-day shipping for all mattresses, apart from Studio and Mattress-Now ranges, which are eligible for next-day delivery
  • Trial: 60 nights. If you decide to return the mattress, Silentnight will give the option of exchanging your mattress for another, but won't offer a full refund
  • Existing mattress removal: Optional, depending on your area
  • Guarantee: 5-year limited warranty
  • Other products available: Beds, bedding, pillows and duvets

See our full list of Silentnight mattress reviews and find out how our members rate them by reading our guide to Silentnight mattresses.

Simba

One of the stalwarts of the bed-in-a-box mattress market, Simba prides itself on its combination of memory foam, foam and pocket springs. Its mattresses are available to test in a number of retailers, including John Lewis and Furniture Village, but also come with a 100-night trial.

  • Costs: Simba Hybrid: Single: £399, Double: £599, King: £699, Super King: £799; Simba Luxe: Single: £1,299, Double: £1,699, King: £1,899, £2,199 (flexible 0% APR finance packages available)
  • Delivery: Free next working day delivery via Silver X Logistics, or free express delivery via UPS
  • Trial: 100 nights. If you decide to return the mattress, Simba will offer a full refund
  • Existing mattress removal: Optional with premium delivery
  • Guarantee: 10-year limited warranty covering manufacturer faults
  • Other products available: Bunk-bed mattress, pillows, duvets, mattress protector, adjustable bed base, fitted sheet, sleep spray, slippers (three bundles available)

Read our full Simba Hybrid mattress review to see how it performs in our lab.

Casper - no longer available in the UK

Casper was one of the biggest players in the bed-in-a-box market, but as of June 2020, it is no longer selling mattresses.

Warranties and trial periods are still being honoured for existing customers. For more information see our story on Casper leaving the UK.

Which? bed in a box mattress reviews

If you’re looking for a great night’s sleep, look no further than our independent and objective mattress reviews. You can have complete confidence in our reviews and test scores because every mattress review we publish is based on the most rigorous lab tests.

It’s essential that your mattress gives your spine the support it needs. That’s why we test each one to see how well it will support people of various sizes, sleeping on both back and side.

After simulating up to 10 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. We also assess the mattress for any change in height or firmness, so we can tell you whether a mattress will sag or soften after a few years of use.

That’s not all. Our testing also reveals how breathable a mattress is, how easy it is to turn over on and how stable it is. Light sleepers 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 member and want access to all these results and more, join Which? today.

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