How we test products
Our mission is to take the guesswork out of finding the perfect sleep products.
We've dedicated hundreds of hours to testing mattresses and sleep accessories, and rely on a team of testers of differing weights, temperature preferences, and sleeping positions to evaluate each product.
Tested products are granted the Sleep Hero tested stamp of approval, a mark of our review's reliability.
If we haven't personally tested a product, please be assured that we invest significant time and energy into scouring the UK market and researching the best recommendations, and we work with a team of sleep experts who review our articles, ensuring that the insights we provide are not only relatable but also reliable.
What is a bed-in-a-box mattress?
A bed-in-a-box mattress to put simply is a vacuumed-packed mattress rolled up into a box. 📦
The box itself is usually around 100 cm x 50 cm x 50 cm.
This makes it a convenient option for fast and efficient delivery.
But how can a mattress be rolled up and stuffed inside a box? 🤔
How a bed-in-a-box works
The mattress is first compressed and rolled using an automated machine. 🕹️
The highly advanced memory foam in the mattress allows the material to be compressed without damage.
Check out the video to see the process! 👇
The rolled mattress is then packed in its box and delivered straight to your door. 📦🚚
As soon as your mattress-in-a-box is delivered, it can be unpacked.
This is where the real magic happens...✨
How long to leave a rolled mattress
Once you’ve unpacked your mattress, carefully remove the plastic wrapping.
Some bed in a box mattresses come with a cutter, but if not you may have to use scissors.
Be careful not to cut into the mattress itself! 😱
As soon as the mattress is unwrapped, it will start expanding. 😮
It’s a bit like watching a deflated bouncy castle be filled with air!
You should wait a few hours for the mattress to return to its normal shape before dressing it or putting any pressure on the mattress.
Some bed-in-a-box mattresses need as much as 12 hours to fully decompress. 🎈
Check the instructions that came with the particular mattress-in-a-box that you purchased.
Who is a bed-in-a-box mattress suitable for?
However, whilst a bed-in-a-box is a fantastic choice for many, it’s not for everyone.
A bed in a box is a great choice for 👍
- Allergy sufferers
- Those looking to reduce their environmental impact
- Side sleepers
- Cold sleeper
- Loft bedrooms
- Those with narrow stairwells/entryways
- Light to medium weight people
- Indecisive people - most come with sleep trials
- Those who need fast delivery
- All bed sizes - but particularly good for super king beds
Unfortunately, despite claims, no bed in a box can truly be a one-size-fits-all mattress...
A bed-in-a-box is less suitable for 👎
- Hot/sweaty sleepers
- Heavier weight people
- Those with physical ailments who need the mattress delivered directly into the room
- Those looking for a high-end mattress
- Those who prefer to try a mattress in a shop
Generally, there will be an online mattress out there for everyone..
You just need to do plenty of research and find the right bed-in-a-box for you.
That's why Sleep Hero have tested the most popular bed-in-a-box brands. 🦸
So, what mattress do you need to buy?
Let's find out! 👇
Great for allergies
If you have allergies, consider a mattress-in-a-box. 🤧
Most bed-in-a-box mattresses are made with hypoallergenic materials like memory foam.
Memory foam is hypoallergenic and resistant to dust mites. 🦠
The Ergoflex mattress is a great choice for those with allergies.
This memory foam rolled mattress comes with a machine-washable cover.
This will help to reduce the build-up of dust and bacteria that can irritate the allergy-prone. 🧼
We also highly recommend using a mattress protector to further prevent allergen symptoms.
The Panda Bamboo Protector is both naturally antibacterial and hypoallergenic, as well as fully waterproof. ☔
Great for the eco-conscious
Because of their vacuumed-packed structure, bed-in-a-box mattresses are much more eco-friendly. 🌍
Their compact size means that more mattresses can fit into a single delivery van than a regular mattress.
This means fewer journeys are needed during delivery and will contribute to reducing our carbon footprint.
Many online mattresses are also made in the UK, further reducing this impact and supporting the British workforce. 🇬🇧
All of Simba Sleep's mattresses are 100% carbon neutral and 100% recyclable. ♻️
Are bed-in-a-box mattresses worth it?
As much as a rolled mattress can be a quick and convenient way to upgrade your sleep...
We must also consider the drawbacks.
Let’s discuss some potential issues with a mattress that comes vacuum-packed. 🤔
Whilst it’s true that bed-in-a-box mattresses can lower the carbon footprint by fewer trips needed in delivery vans…
This doesn’t necessarily mean they’re the best choice for the environment.
Ultimately, rolled mattresses are a mass-produced product made from man-made materials.
They emit excessive amounts of CO emissions that can have a negative impact on our world. ♨️
If taking care of the planet is a priority for you, consider a latex mattress instead.
A latex mattress can feel just as comfortable (or more) as a rolled memory foam mattress.
Natural latex doesn’t emit CO in production and is sourced in a sustainable way.
Natural latex is also fully degradable. ♻️
The Royal Sovereign is made from 100% natural latex and is suitable for every sleeping position.
Killing brick-and-mortar retail stores
Since the dawn of boxed mattresses, high street mattress shops have had much more competition.
Online shopping has had a detrimental impact on high streets and is leading to more and more stores closing down. 😨
It’s worth considering if trying a mattress in a shop is important–and how you would feel if this was no longer possible.
There is also much debate on the safety of bed-in-a-box mattresses. 👀
Some rolled mattresses can be made with cheap memory foam that have off-gassing.
This means they release a chemical into the air that can be harmful.
We encourage you to look for mattresses that have CertiPUR certifications and have been tested against harmful chemicals.
Fortunately, we recommend mattresses that have very low levels of off-gassing as well as low CO2 emissions.
The Simba Hybrid uses CertiPUR foam and is free from toxic pollutants that cause off-gassing.
Quality and brand assurance
There is also much debate on the quality of bed in a box of mattresses. 👀
Can something that is packed and rolled really offer the same comfort as a traditional style mattress?
Some rolled mattresses can be made with cheap memory foam that is not as comfortable as traditional brands such as Tempur.
They are often made with “mini” pocket springs that do not offer the same support as a full size springs.
Additionally, whilst many online brands offer guarantees from 10 years or more–can we really trust that these mattresses will last?
In fact, most online rolled mattress brands have only been around for a few years, which creates some scepticism on these long warranty periods.
Ergoflex is currently the only bed-in-a-box brand that has outlived its guarantee period. 🤯
UK bed-in-a-box sizes
Rolled mattresses come in many sizes. You should be able to find the most common UK sizes in a bed in a box mattress and some custom or EU sizes.
The standard UK mattress sizes include:
- Small single bed-in-a-box mattress: 75 x 190 cm (2'6" x 6'3")
- Single bed-in-a-box mattress: 90 x 190 cm (3’ x 6’3”)
- Small double bed-in-a-box mattress: 120 x 190 cm (4' x 6'3")
- Double bed-in-a-box mattress: 135 x 190 cm (4’6” x 6’3”)
- King size bed-in-a-box mattress: 150 x 200 cm (5’ x 6’6”)
- Super king bed-in-a-box mattress : 180 x 200 cm (6’ x 6’6”)
- Emperor bed-in-a-box mattress : 200 x 200 cm (6’6” x 6’6”)
The box itself is usually around 100cm x 50cm x 50cm.
However, this will depend on the manufacturer.
Bed-in-a-box discount codes
Throughout the year, most bed-in-a-box mattresses will have sales and discounts.
We like to keep tabs on the bestseller bed-in-a-box mattress for the top deals.
Before you checkout, bookmark our discounts page and keep up to date with the latest offers. 🛒
Bed-in-a-box trial period
Most bed-in-a-box brands offer a sleep trial period.
If you’ve never bought a mattress online before, you might be wondering—what’s a sleep trial? 💭
A sleep trial is a specified period in which you have to try out the mattress.
Many bed-in-a-box mattresses offer trials of 100, 200, or even 365 nights!
You are encouraged to use a mattress protector on the mattress but otherwise use it as you normally would.🛌
If, after the sleep trial, you feel you aren’t suited to that mattress, follow the returns process from the manufacturer or retailer.
Customer service will arrange a suitable date to collect the mattress and issue you with a refund or exchange.
These mattress-in-a-box brands offer a whopping 365 days to try out the mattress! 😱
Are rolled mattresses any good?
Overall, we think a bed-in-a-box is a no-brainer.
They can be delivered fast and easily with long sleep trials. ⏳
On top of that, they come in a multitude of options and their comfort is unmatched.
As a mid-range product, you can’t go wrong with a mattress-in-a-box. 👍
However, we advise you do plenty of research before investing in a rolled mattress.
- The trial and warranty period
- The environmental impact
- The longevity of the brand
- The quality of the materials
Alternatively, check out our favourite brands below.