Excellent, both delivery & product. Firm mattress with no side give, which as an “edge sleeper” is a rarity. It is quite heavy but manageable, took only 4-6 hours to fully expand & no “new”... See more

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About Ergoflex
Written by the company
Ergoflex - The UK's Original Mattress-in-a-Box - Highest Rated TrustScore
Ergoflex introduced the mattress-in-a-box category in the UK back in 2006 - a full decade before the competition caught on. The Ergoflex 5G is the product of everything we've learned since; premium materials, enduring comfort and an industry-leading 4.8 Trustscore from thousands of independent reviews.
Our signature true high-density disco elastic memory foam contours precisely to your body to relieve joint pressure and ease back pain. The Cool-Sleep airflow system keeps air circulating throughout, ensuring a comfortable temperature. Beneath it all, a high-resilience base layer gives the Ergoflex 5G its legendary durability - no sagging, no compromise in comfort, year after year. With a naturally breathable TENCEL cover that's removable and washable, we've created the perfect sleeping solution - and our customers agree.
As well as class-leading products, Ergoflex® also offers first rate customer service and aftercare. No chat-bots, no automated responses and no extensive wait times on email. Our phone line and email system is staffed by our friendly professional expert team, who are ready to answer any questions or queries you might have.
Check out our reviews then compare to other mattress-in-a-box brands - the difference is clear.
Loved by Customers. Loved by Experts.
Written by the company

- Ergoflex® is a 2025 Which? Best Buy Mattress
- Our mattress has earned another prestigious Best Buy accreditation from leading consumer group Which?, with particular praise for durability, breathability and long-term performance. As the UK's original mattress-in-a-box company, established in 2006, we know that our customers agree.
- Ergoflex® is Recommended by Expert Reviews
- It’s not just our customers who love the Ergoflex® mattress, the team at Expert Reviews do too. Their specialists put our mattress through its paces over an intensive test and found it to be a supportive, back-friendly choice, awarding a much sought-after “Recommended” accreditation.
A Tried-and-Trusted 10 Year Warranty
Promises Kept Since 2006
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Best mattress ever!
Had this mattress a few months now and can verify that it is the best mattress I’ve ever owned.
Dipped already :(
The mattress is comfortable but has a dip in it where we lie already - after just 6 weeks. It's also just as warm as our last one despite Ergoflex claiming they have some kind of cooling technology in them. I think they're basically all the same so at least I'm happy I didn't pay double the price for a store bought mattress.

Reply from Ergoflex
We have had our Ergoflex kingsize…
We have had our Ergoflex kingsize mattress for over a month now and are very happy with the purchase and it’s well worth the price we paid. It is really comfortable and I haven’t woken up with backache. Although I have rated 5 stars because of how comfortable it is, it does take a while for the chemical odour of the mattress to fade.
A proper sink in feeling without…
A proper sink in feeling without feeling soft - totally supported on side or back
This is my third mattress
This is my third mattress. Very comfortable and well made. Definitely recommend
Great matress, poor delivery experience
The matress arrived very promptly, the website was well played out and easy to navigate. However the courier did not even bring the matress inside ,they just left in on the doorstep. For a product with such weight I would expect it to be taken to the bedroom. Going forward Ergoflex should advise courier to assist. I even offered to move it together but this was declined.
Ergoflex was easy to deal with,
Ergoflex was easy to deal with,
No hard sell with a great product with a great price
Back to an old friend
We had an old Ergoflex mattress that we inherited and used for 7 years and found it very comfortable. We changed to a conventional mattress when we moved and found it to be uncomfortable and when one of us moved in bed the other strongly felt it. We then checked for the name of the old foam mattress and found it was an Ergoflex so we ordered a new king size one which is just wonderful.
Cannot recommend highly enough!
The company delivered on time & it was…
The company delivered on time & it was well packaged. The mattress takes a lot of adjustment , we read about it but it is completely different to most other mattresses.
Our 3rd Ergo flex in the last 15…
Our 3rd Ergo flex in the last 15 years!! And they just keep getting better!
The mattress is brilliant
The mattress is brilliant wish I had found this before we spent money on a tempur!!! Very pleased with purchase and customer service.
Best mattress's for a comfortable good…
Best mattress's for a comfortable good night's sleep, at a good price, and delivered exactly as agreed.
I will recommend Ergoflex to everyone!
Professionally packaged and delivered…
Professionally packaged and delivered and proving to meet the sleep and comfort expectations. I’ve had hip pain at night for five years and since I’ve used this bed, I’ve had nighttime pain. Thanks for the excellent product.
Wouldn't choose anything else tbh
After sleeping on an Ergoflex for a while - it was a no brainer choosing one as a replacement for my son.
He is really happy with it - he was a bit jealous when he tried ours so he can't grumble - he has his own now.
We have had Ergoflex mattresses for the…
We have had Ergoflex mattresses for the last 20 years and they are by far the best mattresses we have had.
A great mattress that can take weight over time at a great price.
We have now had our Ergoflex King size mattress for 2.5 years so this is a real review over time.
Cannot fault it in any way and wish we had bought one so long ago. It a Good/Firm(some will say Firmish even) feel that you can soften using a topper if needed (as we do). It does take a few weeks (perhaps 6-8 weeks) to get used too if you have had a conventional non memory foam mattress but after that you will wonder how you ever managed without one. My wife was unsure about a memory foam mattress but now loves it as i do. It does not get hot.
What is special about this mattress is (1) the excellent price, (2) the quality and (3) unlike many expensive mattress it does not dip in the middle, perfect if you have a husband who is heavy and a wife who is light. I have never even had to turn this mattress even once in 2.5 years, amazing!
Before buying this mattress we had bought at least three others at far more expensive cost in 18 moths - all sagged in the middle after six months - this mattress can take the weight unlike most high street mattress that can cost up to £2000. Five stars from me and highly recommended. Do remember it takes a while to adjust to this type of mattress if you have not had one before and is a Good/Firm rating (or even Firm for some) so some may need a cheap topper (we use one we bought for Amazon that cost only around £35 just to make it a little softer).
Would I but one again - you bet I would but the good news I wont need to for a long time.
This is a true and accurate review after 2.5 years use.
Best mattress ever.
We had bought a second hand Ergoflex for our campervan and it was the most comfortable sleep I'd had in years. So when our our branded hybrid at home needed replacing we bought a new Ergo to replace it. We're so happy with it! Less than half the price we'd paid for our old one and 100 times more comfortable. Great product!
Just want to warn potential customers…
Just want to warn potential customers for Ergoflex that if you write a bad review about them they claim that you are threatening them. All I am doing is highlighting how unfair and not very well treated my wife was for a recent purchase which turned out was not what she wanted. In other words a genuine mistake!
Based on Ergoflex's reply this review then stands as a WARNING to potential customers.
We were not looking for a refund, just simply to get the right product so an exchange would have been fine. The product sent, which my wife holds her hand up and says she made a mistake in ordering the wrong item, just needs to be exchanged for the right one. It hasn't been used, taken out of it's packaging, unfolded, slept on, changed our minds etc etc. It is just a tiny little label which is easily replaced.
So again, potential customers of Ergoflex BE VERY VERY CAREFUL when purchasing from them

Reply from Ergoflex
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