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ComfiCel® Gel Foam Mattress
From: £289.99
✓ Cut to ANY size
✓ Free Mainland UK delivery
✓ 5 year warranty
✓ Zip off cover included
Measurement guide
How to measure your new mattress
When taking measurements, you can measure your bed frame or existing mattress. For the very best results however, we recommend measuring the bed frame in line with the guidance offered below:
Is your mattress enclosed?
If your mattress sits inside a frame or in-between walls, we recommend ordering a width and length 2CM smaller than the space it fits in. This gives a 1CM gap all the way round, perfect for tucking in sheets with ease!
Does your mattress sit freely on top of a base?
If your mattress isn’t enclosed (such as a divan bed), then there’s no need to make any reductions to your measurements and you will get the best finish by going with exact dimensions.
What thickness should you order
Looking for the best night’s sleep?
If you have no restrictions on height, we recommend a depth of 20cm (8 inches) for ultimate comfort.
Need a thinner mattress?
If a thinner mattress is required, please follow the guidance below:
- 12cm or less: Upgrade to a firm feel for improved support
- 13cm and above: Read our guide on “weight considerations” shown below
Weight considerations
Under 15 stone?
If you weigh less than 15 stone, you can opt for any firmness rating providing your mattress has a thickness of 13cm or above. If thickness is less than 13cm, we recommending upgrading to our firmer feel for enhanced support.
Over 15 stone?
If you weigh 15 stone and above (but less than 20 stone), be sure to upgrade to our firmer feel for enhanced support.
Weigh more than 20 stone?
If you weigh more than 20 stone please contact us to discuss your requirements.
Have questions about buying a mattress?
We’re passionate about sleep and our experts are ready to answer any questions you might have
Can’t find what you’re looking for?
We can make mattresses to any shape or size, so let us know what you’re looking for and we’ll be in touch with a quote!
Firmness ratings
Which firmness rating should you order?
Regardless of your chosen firmness rating, the top layer of your mattress will remain the same. This means you’ll still enjoy the same level of comfort and pressure relief that you’d expect up top.
When you upgrade to a firmer feel, the bottom layer is swapped for a more supportive, higher density foam. This helps to provide you with a better level of support, as well as preventing you from sinking into the mattress as much.
For those that like their mattress to have a little more ‘give’, the standard firmness rating is usually the preferred choice.
Weight considerations
Under 15 stone?
If you weigh less than 15 stone, you can opt for any firmness rating providing your mattress has a thickness of 13cm or above. If thickness is less than 13cm, we recommending upgrading to our firmer feel for enhanced support.
Over 15 stone?
If you weigh 15 stone and above (but less than 20 stone), be sure to upgrade to our firmer feel for enhanced support.
Weigh more than 20 stone?
If you weigh more than 20 stone please contact us to discuss your requirements.
ComfiCel® Gel foam
A great mattress should leave you feeling fantastic each morning, and we think our ComfiCel Gel foam does just that. This revolutionary material is quick to respond when you roll over, perfectly sculpting to your every curve almost immediately.
What makes this mattress great:
 | faster to respond |
 | better freedom to roll |
 | pressure relieving |
 | cloud like support |
 | no rolling together |
 | 2 comfortable layers |
 | durability built in |
 | zip off cover |
How it compares:
Memory Foam | ComfiCel Gel | ComfiCel Cool | |
Warranty | 5 year | 5 year | 5 year |
Suitable for daily use | ✓ | ✓ | ✓ |
Removable cover | ✓ | ✓ | ✓ |
Reduces pressure points | ✓ | ✓ | ✓ |
Supportive base layer | ✓ | ✓ | ✓ |
ComfiCel technology | ✓ | ✓ | |
Faster to respond | ✓ | ✓ | |
Sleeps cooler | ✓ | ||
Enhanced pressure relief | ✓ |
You’ll love our service:
 | british made |
 | 1,000’s of happy customers |
 | free and fast delivery |
 | easy to install |
 | any shape or size |
 | excellent customer service |
The science of a good nights sleep
A good nights sleep is important and can be linked to a longer, healthier life. The ComfiCel range combines cutting edge technology, with innovation and creativity so you stay wonderfully comfortable all night long. Compared to more traditional mattress materials, you can expect improved durability, better freedom to roll and most importantly – a better nights sleep!
74 reviews for ComfiCel® Gel Foam Mattress
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Delivery times:
All products are made to order and delivery dates can vary. Please click here to view current delivery timesDelivery information:
Our couriers typically deliver Monday - Friday between 8AM - 6PM. Please click here to read more about deliveryFree Mainland UK delivery:
We offer free mainland UK delivery on most orders although some geographical restrictions apply. Please click here for further informationSuitability:
When ordering it's important suitability is a key consideration. Click here to learn more about suitabilityCaring for your new mattress:
To help get the best out of your new mattress we have put together a care guide which must be followed. Click here to read our care guideWarranty:
In the unlikely event that your new mattress develops a fault, we've got your back! This mattress is covered by a 5 year limited warranty. Click here for full informationReturns:
Please click here to view our returns policyFull Terms & Conditions:
Click here to read our full terms and conditions which apply to all orders.You may also like…
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Vanessa –
Ordered a ComfiCel Gel Foam mattress with specific length, width and thickness (to fit inside a trundle bed). Mattress arrived just 7 days later and is just perfect. Perfect for size and comfort. I strongly recommend.
stef –
very good to deal with would buy again
Jude Garner –
Excellent, perfect fit and very comfortable.
Nichola –
Great service and great quality mattress.Very happy with purchase
Sally M –
The mattress is great – cam much more quickly than initially predicted, fits perfectly. I got a Medium hardness grade and the thickest, it’s pretty firm but I’m sleeping very well on it and it supports really well
Donna –
Our mattress is amazing fits perfect. It is so comfortable and arrived so quickly. Very good service
Emily Kelly –
Really friendly and helpful service.
Quick deliver
And very comfortable mattress. Very happy we bought from custom size beds.
Sam –
This is by far the most comfortable mattress me and my partner have ever had!! We got this matters custom desgined for our campervan. I honestly can’t belive how quick it came!! Customer service is absolutely amazing as well. We will definitely be buying all our future mattresses from you!! Thank you for the best night’s sleep!! We littrally can’t wait to get into bed and never want to get out of it now 😅
Max Silverman –
V good quality , supplied quickly .
john rose –
great mattress, exact size even though it is non-standard, delivered fast, thanks
Jane Morrison –
This mattress is fantastic, even more comfortable than a certain well known brand that I use at home. Fits the campervan perfectly.
Chris Barrow –
Lovely mattress couldn’t be happier. Thanks Sam
Lynne macleod –
Love my new mattress perfect fit for the horse lorry making nights away much more comfortable
George Jaconelli –
My mother is having good nights sleeping since started using the mattress.. Defo recommend.
Robert PRINCE –
Great service, followed by a great comfortable mattress, couldn’t have had better. Would highly recommend.
Marilyn whitton –
Would highly recommend this company -exceptional service from start to finish ! Great mattress at a great price ! Very satisfied !
Diane –
Great product, this is a replacement for my last mattress which was also from custom size beds. No complaints with first one it was just old.
Mrs Bev Turner –
Just received our shaped gel mattress for our motorhome. It arrived earlier than anticipated, the quality and fit is superb along with the great customer service. I would recommend this company highly.
Steve Gale –
Fantastic service from the ease of ordering online to delivery, even when the courier returned it as undeliverable a member of staff called to let me know and shipped it back out the same day.
The quality is great and was a perfect fit and really comfortable.
Denis mawle –
Very helpful staff on the phone when ordering, prompt delivery and fits our van conversion perfectly. I have a back issue and found the mattress very supportive , didn’t feel like we had compromised on comfort in the van at all.
Delia Shephard –
I ordered a ComfiCel Gel Foam mattress for an odd sized antique bed. The mattress was delivered far sooner than expected. It is a great fit and so far very comfortable though I haven’t had it long. The quality appears good and the company was very helpful when I got in touch to check on something during the order period.
Ruth Green –
Ordered the Comficel Gel Foam Mattress.
Delighted with this mattress,
Very comfortable and has helped my sons back problem. Good Customer Service and prompt delivery.
Maria Cristina Chiorean –
Over the moon with our new matress. We were looking for something that would fit our daughter’s bed which is a custom size and that could be used by an adult occasionally as well. Glad I came across this website in my research. I will definitely get a second matress for the top bunk now that we know this is such a good quality and comfortable mattress. The delivery was quick and we are delighted with the service and the product
Andy –
I’ve had mine for over a year now and it has transformed a spare foldaway bed from something that was never used to something that is regularly used! It’s really comfortable and I enjoy sleeping on it. I’m now planning to get another one to upgrade a sofa bed mattress.
Prompt and responsive service, thank you!
Keith –
Very comfortable, quick delivery would recommend to any one who suffers with back pain helped mine loads with the right mattress
dave –
i had a custom size mattress made, very quick service excellent quality and very comfortable definatly recommended
Nikki Dean –
Brilliant service, mattress arrived far quicker than expected and is excellent quality. Happy customer!
Hurst –
Very prompt and very helpful.
Matt –
I had a custom size mattress and 2 fitted sheets made to fit my van conversion. Very well made and extremely comfortable, would definitely recommend using them.
Janice –
Had a mattress made to measure and 2 fitted sheets. Very pleased with all the products and would recommend using this firm. Very happy. Thank you
Janice –
Had a mattress made to size as needed slightly smaller than single to slide under another bed so when pulled out makes a double bed.
I also got 2 fitted sheets made to fit. Extremely pleased with all the products and would recommend using this firm. Very happy. Thank you
Marta –
My second mattress from customsizebeds. Very happy customer. This time I also bought fitted sheets, which have proven to be a good buy, very soft.
Janey P –
Our wonderful new mattress has transformed how we use our beloved old camper van – no more waking up with achy backs and hips after a few nights, just cool, comfortable, undisturbed sleep. Delighted!
Katie Thorne –
It did take a while for me to receive my mattress for my caravan because of the Covid situation which of course I realise was not the fault of Customsizebeds. Saying that I couldnt fault the customer service I received from Myles his polite, professional and informative emails were reassuring. In these trying times it is good to experience this level of professionalism and helpfulness.
I am looking forward to trying out the mattress.
Allen Hanley –
It took a while to get our mattresses with the problems that covid presented the company but the effort they went to and the communication was excellent. The mattresses are excellent and for the first time in many months we are both getting a good night’s sleep. I would highly recommend Customsizebeds and long may they remain.
Lisa Edmondson –
I needed a custom sized single mattress to fit a bed frame in an alcove in a box room. I am so pleased I found this website. Mattress is excellent quality and worth the money. I was kept informed regarding delivery throughout and particularly with the Covid situation. Would highly recommend.
Rachel Englefield –
Really was a lifesaver … got a mattress to us in ultra quick time so my husband could have his first proper good night sleep in our caravan in 3 years. Cant recommend the mattress or the service enough.
Amanda –
Great service, easy process. Brilliant fit and so comfortable. Would definitely recommend
Lin Corden –
Excellent service, very helpful and knowledgeable. Very comfortable mattress exactly what I wanted to fit my non UK standard bed. Would certainly use company again.
Nicola Cahill –
Love this mattress! We had it made for our camper conversion, just been away for the first time and the bed was heaven.
G Young –
Mid range mattress bought for caravan to Bedroom to replace seating cushions. Excellent quality and perfect fit. Delivery time was quicker than expected. Would entirely recommend this company,,
Mrs Luetchford –
Mattress fitted our caravan bed perfectly which was such a relief as it is a tight space. We bought the mid range quality and it’s a very good mattress indeed. It is in a well made quilted feel mattress cover. Fast delivery, helpful customer service. We are very pleased!
Mick Bagley –
Bought two custom size for the motorhome. Arrived in three days. Excellent service. Seem to be very comfortable. Will really try them out once the sites reopen.
Selena –
Fabulous! Comfortable…..best mattress ever! Quick delivery and very professional service
Janet Aldington –
Prompt service and speedy delivery, exactly to the requested size. The mattress is very comfortable and I would recommend your business. Only fault was not knowing day of delivery.
Vic –
Great service, swift delivery super comfy! Went in gypsy wagon perfectly. Must be good I actually wrote a review;)
John Goodall –
Very comfortable and the order was fulfilled to totally meet our expectations
Robin Hoar –
Fast delivery – quicker than expected. Fits just right to a slightly non-standard bed. Very comfortable.
John Leckie –
The size required was just less than a standard single but having it right makes a lot of difference. The mattress is nicely firm and supportive. Delivery was very prompt.
C Phillips –
3cm makes all the difference in fitting our 70s vintage multi way bed. Good choice, easy to order, quick to arrive – and comfy.
Martin Foster –
Incredible service, good product very comfortable
Barbara –
First rate. Lovely staff, helpful and very pleasant. Mattress arrived in good time. I wanted it for my Summer House, as I have a bad back and it is perfect. Well done everyone at Custom Size Beds.
Jamieson Blakey –
Ordered a cheap alternative off eBay, waited over 3 weeks with no contact only to discover they had not even sent it. Cancelled order and sent size to Custom Size Beds – 3 days later it was here! Amazing! The quality is awesome and the comfort? Even better than our house bed! Do not hesitate to order from here you won’t regret it
Adam Thompson –
Dealt with Miles and he’s a credit to your sales team, no bullshit, just decent technical advice and the proof is in the product I’m well happy
Lucy francis –
We needed a mattress for our caravan as my bad back can’t cope with sleeping on the seat cushions. The mattress arrived in 2 days and fitted perfectly so it can also be used as a seat. It was the most comfortable sleep I’ve had in a long time. No more aching in the morning! I just need to convince my husband to let me buy one for our bed at home!! Thank you.
Dawn Felton –
I stumbled across Custom Size Beds about a year ago as we have a handmade narrow spare bed. We were very impressed with the handmade mattress we received and it has been used many times since then. About a month ago we started looking for a new mattress for our king size bed. There’s just too much choice and even going into a shop doesn’t really help. Then I had a brainwave and rang Custom Size Beds to see if I could order the same mattress as we had on our spare bed, but as a standard king size. Of course we could! Ordered it on the Thursday, made on Friday, arrived with us on Monday. Fantastic service and such a comfy mattress.
Mica Lewis –
Super comfy product, amazingly fast delivery with only very short notice. Friendly and competent advice on the phone and impressed with the accuracy of our made to measure mattresses (x3 for our caravan). I will certainly be placing another order for my continental king size bed at home which is not a standard UK King size. Thank you guys, highly recommended! 🙂
Madeline Corlett –
Cannot speak highly enough of all the help and advice that I received from Myles prior to ordering this ComfiCel Gel mattress.
I have had back/spinal problems for many years and tried many mattresses to no avail until now!
Arrived securely packaged and promptly.Could not believe how comfortable and reduction in pain the first night I tried it-just made so much difference.
My daughter has just come back from Uni and is well impressed just lying on it.Thinking of sleeping on it so hope she isnt staying long!!
Very highly recommended-buy it especially if u troubled with back problems.
Excellent customer relations and communication.
Would not hesitate to order from Myles and his Company again.
Thank you for making such a difference
Madeline
Madeline Corlett –
Cannot speak highly enough of the excellent customer relations and advice I received from Myles.
So very helpful with all my questions leading up to my order of my wonderful mattress.
I have had spinal issues for a long time.
Tried many mattress but to no avail UNTIL I slept on the Gel foam one .Amazed at the difference to my comfort and pain after only one nights sleep on it.The mattress arrived very promptly and very well packaged.I have a low ottoman slat bed and ordered the 10foot double.Fitted neatly in the frame.
Daughter just arrived back from Uni-she is well impressed!Thinking of having some sleeps on it-so hope she isnt staying long!!
If you have back/spinal pain dont hesitate buy one you will not be disappointed.
Very highly recommended for product and customer service relations.
Thank you Myles and staff.Will not hesitate to order from you again.
Madeline
Robert Dare –
An absolutely brilliant service.
I called Myles, who gave me good advice on what to choose. He talked me through every step of the order process. Giving advice on the way.
Two days later my new mattress arrived and fitted perfectly.
I cannot say how much I am impressed with these guys, and I would not hesitate to order from them again.
Highly recommended.
Celine –
Excellent mattress – comfortable, firm (ordered extra firm and it is) – very fast delivery.
David –
excellent product and fast delivery!
Zoe –
Absolutely thrilled with this mattress. It arrived within a few days and was so easy to carry upstairs and unwrap. There was barely any smell at all and i love the corrugated top, which is like having a massage! Also wonderfully firm – i didn’t realise how bad my old one had become till i slept on this – it’s great and i wish i’d found it years ago. Thank you!!
Stuart –
The mattress is great. You produced it very quickly, and you were very helpful in solving delivery problems.
Roger Plackett –
Quality of product excellent….standard of your really prompt service very good….thank you.
Carole Hegedus –
Really pleased with this mattress, which was to fit a small custom bed frame in a box room. And beyond impressed
with speed of delivery. What a super service!
Cara Nix –
Absolutely thrilled with our new Mattress, thank you Custom Size Beds.
We were struggling to find a mattress for our unusual sized bed. The service and communication from Myles was fantastic.
Great quality mattress at a brilliant price.
Janet Stansfield –
We purchased the mattress for our narrow boat, the company were helpful, polite and delivery was super quick. Mattress is very comfortable, fits the bed perfectly and we’re very pleased, than you custom size beds.
Mrs. Jaqueline Biggs –
I am an American ex-pat living on a narrow boat. This company made everything very easy for me, including returning the mattress, having it cut down and sent out again because I screwed up the cm measurement (we use Imperial measurements in the States). The new mattress fits perfectly and I have a better night’s sleep on it than I had on my $1800.00 Sealy Posturpedic back in the States. I no longer wake up with an aching back, neck, and joints feeling like I spent the night in a dungeon of the Spanish Inquisition. At every step the customer service and delivery was superb and this mattress is literally a dream come true. Thank you M2MM.
Jens Bollerod –
I live on a boat so I needed a difficult to find shape and depth of mattress. The company was helpful, efficient and informative. The mattress that was delivered was excellent and I can’t praise them highly enough.
Martin Farrar –
Never had a foam mattress before. This one is comfortable and supportive
Lindsey dodgson –
I bought this matress for my little girl as she had a custom made bed and I needed a smaller matress, after struggling to find somewhere to make it I came across custome size beds and I order my matress after reading such good reviews. They even inboxed me to double check my measurements as I had written them down wrong, I’m so grateful they double checked with me otherwise it would of been to big for my daughters bed.
My daughter loves her matress and it is extremely comfortable.
Thankyou for all your time and help in making sure I had the right measurements, I will definitely be ordering from you again.
Sarah Thompson –
Really delighted with our mattress which we had made to fit our narrowboat bed. It arrived in super quick time and is very comfortable – we like a firm mattress and this fits the bill. We had the flat top version. I would highly recommend this company for their customer service and responsiveness.
NIck –
This is the first time i have ever written a review and the reason i am doing it is because it has been a hard time finding the right mattress online. My Wife and I spent ages looking online and visiting shops to try and find the right mattress. We bought from another company and had to return it as it was horrible. Then after more research i decided to take the plunge and go for this one. We went with the Flat top version. I have to say after a long time looking and making mistakes buying a cheaper version we have finally had a good night sleep. This is by far the best mattress i have slept on in my life and anyone looking for a good firm but soft top mattress look no further this is the one for you.
I am only writing this review because it was so hard to decide which one to buy, if you are the same as me and have been looking for ages trust me this is the one for you, you will not regret it.
Also the company themselves are extremely helpful and the customer service is what you hope every online business can be like. They originally delivered the wrong type and sorted it within a few days.
Thanks Custom Beds i will be recommending you and this mattress to friends and family.