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REM-Fit Sleep 400

A memory foam mattress that won't heat you up. Infused with cool gel and combined with pocket springs, it's the perfect nest for all shapes, sizes and sleeping positions creating the perfect rest!

Availability: In stock

Hybrid Cooling Gel Mattress
  • 6 layers of engineered and universal comfort to enhance sleep & recovery!
  • 50mm deep active cooling gel regulates temperature.
  • 20mm deep Mediflex memory foam provides pressure relieving comfort.
  • 140mm high Pocket springs provide a perfectly balanced tension and aid upper and lower back support.
  • 140mm high edge-to-edge support encases the mattresses layers and provides consistant suport across the entire sleep surface.
  • 40mm deep core base layer creates the perfect foundation for a great nights sleep.
  • RE-AX fabric - 100% breathable and silky soft to touch.
  • Single sided non-turn mattress.
  • Anti slip base.
60 Night Trial
  • 60-night trial in your home - in partnership with the British Heart Foundation.
  • Free returns on all orders.
  • 100% full refund - no catches and completely risk frree.
  • 100% of our returned mattresses are donated to the British Heart Foundation.
Free Next Day Delivery
  • Free Next day delivery to UK (with exceptions).
  • Orders must be placed before 1pm.
  • Delivery will be made the following working day.
  • Saturday delivery available - optional extra at checkout.
  • Pre 12 noon delivery available - optional extra at checkout.
10 Year Guarantee
  • We're so confident in the build quality of out mattress that we have included a 10 year full replacement guarantee at no extra cost - so you can sleep soundly for years to come!
Two FREE Tracker 100's
  • For a limited time only we’re giving away two of our Tracker 100 wrist bands when you buy the mattress! View Tracker 100

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£299.00 £39.00 / month - interest free credit
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Cool gel infused memory foam

Cool gel infused memory foam

Heavenly soft and super cool to sleep on, we’ve developed a unique layer of cool gel infused memory foam that gently moulds to your body’s contours without heating you up! 

Cool gel infused memory foam
Mediflex memory foam

Mediflex memory foam

OUR MEDIFLEX MEMORY FOAM LAYER IS DESIGNED TO CRADLE THE BODY’S SHAPE, GIVING A FEELING OF FLOATING AND UNIVERSAL COMFORT, SAY GOODBYE TO SORE SHOULDERS AND HIPS.

Mediflex memory foam
Spring back to life

Spring back to life

ONE THOUSAND 14CM HIGH POCKET SPRINGS PROVIDE A TAILORED SLEEPING EXPERIENCE. EACH SPRING RESPONDS INDEPENDENTLY AND WILL COMPRESS UP TO 14CMS WHEN MAXIMUM FORCE IS EXERTED, PROVIDING EXCELLENT SUPPORT FOR YOUR UPPER AND LOWER BACK. SLEEP PEACEFULLY WITHOUT BEING DISTURBED BY YOUR PARTNER'S MOVEMENTS.

Responsive pocket springs
Edge-to-edge support

Edge-to-edge support

Foam encapsulated side walls deliver strong edge-to-edge support, allowing you to sleep tight to the edge, whilst ensuring a consistent tension is kept across the entire surface of the mattress.

Edge-to-edge support
Built to last

Built to last

A deep layer or high density foam provides integral support, creating the foundation for a great night's sleep.

Core base layer
Re-Ax breathable cover

Re-Ax® breathable cover

Encasing the 25cm deep Hybrid mattress is our exclusive thermo-regulating knitted fibre, providing a fully breathable fabric structure that is silky soft to touch.

Re-Ax® fabric cover
60 night sleep trial, free return collection

It's yours for 60 nights to do as you please with it, whatever that might be! All our mattresses returned under the 60 night trial are collected by the British Heart Foundation - for FREE.

Boxed and ready
60 night sleep trial, free return collection

night sleep trial, free return collection

It's yours for 60 nights to do as you please with it, whatever that might be! All our mattresses returned under the 60 night trial are collected by the British Heart Foundation - for FREE.

Boxed and ready

Free next day delivery
Free and simple returns

10 year full replacement
guarantee at no extra cost

The rem-fit sleep 400 mattress features an anti slip surface and is designed to sleep on all base types

Divan Base

Slatted Bed Frame

Platform Top Base

REM-Fit Hybrid Mattress 1
REM-Fit Hybrid Mattress 3
REM-Fit Hybrid Mattress 4
REM-Fit Hybrid Mattress 1
REM-Fit Hybrid Mattress 1
REM-Fit Hybrid Mattress 2
REM-Fit Hybrid Mattress 5
REM-Fit Hybrid Mattress 6
REM-Fit Hybrid Mattress 1
REM-Fit Hybrid Mattress 1

As featured in

REM-Fit featured in Yahoo News
REM-Fit featured in The Telegraph
REM-Fit featured in The Daily Mirror
REM-Fit featured in Engadget

REM-Fit Tracker 100 Offer

For a limited time only we’re giving away two of our Tracker 100 wrist bands when you buy the mattress!

REM-Fit Technology

REM-Fit Tracker 100

Improve your rest and motivate your activity. Utilising proprietary algorithms, the REM-Fit Active 100 analyses your day activity and sleep, to produce ActivePoints and SleepPoints. Track how many calories you burned in a day and aim to increase your step count from the day before. Don't just track you day activity, track your night activity too, and aim for a 360 life score!

More Info

App Store Tracker 100 App
Google Play Tracker 100 App
REM-Fit Tracker 100

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Reviews

48 customer reviews

Average rating
(based on 48 reviews)
Your Rating
  1. Impressed

    Review by Kelly Y (Posted on May 26, 2017)

    We've been sleeping in the Rem-fit mattress for the last three nights and although each night has been very warm, we can genuinely say we didn't feel hot in bed, very impressive indeed! Really comfortable too. We will be recommending to friends and family!

  2. More than happy

    Review by Alan H (Posted on May 23, 2017)

    I sleep on my my side and I love it, my wife sleeps on her front and loves it too! We're both more than happy with the purchase and won't be sending it back after 30 days. The free wrist trackers were a great free gift too!

  3. Superb Mattress

    Review by Christoph M (Posted on May 22, 2017)

    Amazing!! Can't thank you enough rem-fit, this mattress is a god send! No longer do I wake in the morning, aching from brutal shoulder compression. Exactly what I was hoping for from a gel top mattress. The cooling ability appears to be working well too, the nights are starting to get warmer, but I'm definitely not feeling hot whilst I sleep. We will be back for the smart pillow as soon as we can afford it, looks superb too!

  4. Oh sooo coool

    Review by Linda D (Posted on May 15, 2017)

    Save to say we will not be sending the mattress back as we love it! Our number one concern was choosing a mattress that keeps you cool and the Rem-Fit mattress really does work at preventing you from getting too hot. It's incredibly comfy too, getting up and out of bed in the morning is now doubly hard though, but we'll survive ; )

  5. Comfortable and good service

    Review by Steve L (Posted on May 10, 2017)

    Comfortable mattress we are delighted with it! Easy ordering and delivery was very fast - great service!

  6. Mattress Heaven

    Review by Louise S (Posted on May 02, 2017)

    The mattress is soooo comfy!! I've been researching and researching for a cool gel memory foam mattress like this for months and I'm over the moon with my decision. My last mattress was good at keeping me cool but I used to wake through the night having to change position in order to stay comfy. The memory foam gel layer in this mattress is heavenly soft, you really do feel like you are floating! It's very clever because the overall feeling of the mattress is probably medium - firm, my back definitely feels supported. I can only assume that the pocket springs are very firm as the top layer is incredibly comfy. The wrist trackers were a great free gift and the app works well - extremely pleased!

  7. Very good mattress!

    Review by Claire A (Posted on April 28, 2017)

    Really pleased with our REMFIT mattress so far. It's a massive step up from our last mattress which was supposed to be good at keeping you cool, but did quite the opposite! This one actually does keep you cool, AND...it's unbelievably comfy too. My advice is to try it out, what have you got to lose when you can trial it for 60 nights!!

  8. very comfy

    Review by Jasmine P (Posted on April 26, 2017)

    Very comfy and delivery was quick and easy. According to the sleep monitor, on my first night of use, I achieved a sleep score of 95 out of 100!

  9. Good mattress

    Review by Kevin V (Posted on April 18, 2017)

    Asides from the delivery hiccup we are very pleased with our purchase. The mattress is living up to the websites claims and myself and my wife are sleeping much better.

  10. It works!

    Review by Rachel L (Posted on April 13, 2017)

    So much cooler than my old my memory foam mattress! The tension is amazing too, really comfy but still supportive - thank you for giving me my sleep back!

  11. Very happy and very impressed!!

    Review by Joshua T (Posted on April 06, 2017)

    The mattress is absolutely fantastic, I'm really impressed with the quality and comfort for the price. The monitoring technology is very interesting too, its helping me get more quality sleep and feeling much better in the mornings. All in all, I've had an excellent experience from start to finish with Remfit and cannot recommend them enough!

  12. Splendid experience

    Review by Kenneth T (Posted on March 26, 2017)

    I'm very impressed with the service. This company has really gone the extra mile for me and I'm very grateful for that. I love my new mattress and the technology side of it is really interesting and unique. I think it's already improved my sleep. I the customer service team are absolute stars and deserve bonuses!! :D

  13. 5 Stars

    Review by Paul M (Posted on March 20, 2017)

    I've been looking online for a while and couldn't decide between Remfit and a similar brand. So I spoke to both companies online and have to say that the person at Remfit was much more knowledgeable and helpful (can't remember her name sorry). This really helped me make up my mind and order, and I'm so pleased I did! The mattress is fantastic and ticks all the right boxes for me in the comfort department. Really pleased with the quick delivery too and the fact it comes with a sleep trial, 5 stars from me :))

  14. It's good!

    Review by Donna T (Posted on March 15, 2017)

    We decided to buy a Rem-fit mattress because of the 60 night trial and it's claims to keep you cool. The fact that they offer a trial period goes to show how confident they are about their product. Needless to say, we're very pleased with the overall shopping experience and the mattress is just so comfy! The cool gel memory foam works brilliantly and feels much much cooler than our old pure foam mattress. Highly recommend - keep up the good work guys!

  15. Oustanding Service

    Review by Carole P (Posted on March 14, 2017)

    We ordered the mattress in the morning and had it delivered the very next day, as promised. So far we're really pleased with the quality, it's definitely surpassed our expectations. Really comfortable and supportive mattress, we had a great night's sleep and looking forward to many more! Very happy with the service and with price paid too. Well done guys, will recommend!

  16. Coooool mattress

    Review by Sheena A (Posted on March 10, 2017)

    Loving the mattress so far! It's a hundred times better than my old foam one, definitely feel cooler at night. Time to start saving for one of those smart pillows now : )

  17. Fantastic

    Review by Charlotte L (Posted on March 07, 2017)

    Fantastic mattress, I love my REM-FIT, it's a godsend : - )

  18. Sleeping Happy : )

    Review by Maria B (Posted on March 05, 2017)

    So happy we made the purchase, It's a pleasure once more having to go to bed and to wake up feeling truly rested! We both suffered with pressure build up on our shoulders and would regularly have to move from one side to the other throughout the night. We more or less sleep right the way through on the rem-fit mattress, which feels amazing, after having years of inadequate sleep! Very fast delivery too!

  19. Not for me

    Review by Abbey M (Posted on March 03, 2017)

    We're used to very firm mattresses so this one didn't work for us. Very good service and excellent to know that the 60 night trial works though!

  20. Spot On

    Review by Jacki C (Posted on March 02, 2017)

    Just wanted to say how pleased I am with my new mattress. It's just the right firmness and super comfortable. I had the best night sleep I've had in ages! Also, really happy with the service. We were kept informed and it came bang on time. Thanks for a great service and for a fantastic nights sleep.

  21. LOVE LOVE LOVE

    Review by Sadie M (Posted on February 28, 2017)

    Three words - love love love! Wow you've knocked it right out of the park here. This is without any hesitation or doubt the most comfortable mattress I have ever slept on, and being an air hostess for over 15 years I have slept on many quality mattresses around the world. Buy with complete confidence, you'll be pleased you did!

  22. Quality mattress and sleep monitor

    Review by Stefan (Posted on February 23, 2017)

    Sublimely comfortable and looks great too, it's a shame we have to cover it up! Tracking my sleep and nighttime activity is intriguing, it's awesome how it can detect your breathing and heart rate all from under the bed sheet, very clever! Really impressed with this brand and it's products - keep it going!!

  23. Feels Great!

    Review by Claude M (Posted on February 19, 2017)

    The first night was amazing, so comfortable! Thanks.

  24. Impressive mattress

    Review by Kayleigh V (Posted on February 15, 2017)

    Unboxing and unrolling the mattress was a novel experience, never have I seen anything of that size expand so quickly!! When on top, the mattress feels supportive and gently moulds to your body's position. The cool gel memory foam works well too, I don't feel hot and sweaty like I used to in my old memory foam mattress... which by the way was considerably more money. Really Impressed with the mattress!

  25. I now own a hybrid mattress

    Review by Karl R (Posted on February 15, 2017)

    Easy ordering. Easy delivery. Mattress feels great too!

  26. Cool & comfortable

    Review by Liam P (Posted on February 14, 2017)

    Happy with the purchase and the mattress feels very comfy.

  27. 2 fussy but now happy sleepers!!

    Review by Tracey N (Posted on February 13, 2017)

    We went store to store looking for the mattress to fit our needs. My boyfriend likes a firmer mattress where as I prefer a softer mattress. We happened to find the REM-FIT website by chance but liked the sound of the universal comfort plus liked the idea of tracking our sleep. The 60 night trial was the clincher and I'm pleased to say we are more than happy with the mattress and our purchase. The sleep monitor works well and looks very high tech in position with it's little green light on. Hurry up with the the zeeq pillow now so I can stop him snoring!!

  28. Cool mattress

    Review by Nic W (Posted on February 13, 2017)

    Feels soft when you sit on the edge but as soon as you lay down, it has just the right firmness - feels lovely. I sleep much cooler in it compared to my old latex mattress too.

  29. Love it!!!!!

    Review by Abel I (Posted on February 12, 2017)

    We use our Rem-Fit mattress on our ottoman slatted bedsteads - works a treat with the anti slip base! This is only the second mattress we have ever brought and the first one was pretty cheap so the bench mark was very low. That said, this mattress really is sooo nice and comfy you will struggle to get up for work in the mornings. I have recommended to all my friends and family.

  30. Soft but supportive

    Review by Agata A (Posted on February 11, 2017)

    Highly recommend.

  31. Top service and lovely mattress

    Review by Michelle W (Posted on February 09, 2017)

    Had to send the first one back as it had a mark on the side of the mattress. The mattress was collected and redelivered swiftly - very good after service! The mattress itself is superbly comfy and we are now getting excellent Zzzz. Keep up the good work REM-Fit!

  32. Sleeping much cooler

    Review by Janice C (Posted on February 09, 2017)

    Needed a new mattress because I was overheating every night in my pure memory foam mattress. I'm not sure if it's because this mattress uses springs which allows more air to flow or because the cooling gel really is as good as it claims, but whatever the reason I am now sleeping loads cooler. It's a very comfy mattress too and I like the fact I can track my sleep patterns, this is a great addition! Top delivery service, I ordered at 11am the morning before and delivery was with me at 9am the day after, that's incredible service!!

  33. Best mattress we've ever slept on!!

    Review by Joel G (Posted on February 08, 2017)

    Feels better than a 5 star hotel mattress. Seriously comfy, I can not stress this enough. It's hard getting out of bed in the morning but that's something I'm willing to live with. With a 60 night trial what can go wrong!n

  34. Great mattress

    Review by David M (Posted on February 07, 2017)

    Superb mattress at a decent price. I looked around the internet for a while comparing a lot of mattresses and I'll be honest, I actually purchased two of the other mattress brands offering sleep trials ahead of the REM-FIT mattress but didn't get along with either. For me the REM-FIT mattress does a better job at moulding round your body and also feels like it supports my back better, not to mention it looks far better quality than the other two I bought. They both were double folded and looked nothing like as good quality as they did on their website. If you want a mattress that accurately moulds to your body whilst providing a medium support then I recommend the REM-FIT mattress. Good service as well - looking forward to the smart pillow becoming available!!

  35. Excellent and top service

    Review by Neil A (Posted on February 07, 2017)

    Firstly, the mattress is all it claims to be. Very soft on top, moulding to your body. I don't get the feeling of sinking all the way through the mattress, I'm assuming this is the pocket springs that prevent this and give the support needed for your back. Lastly, it does a good job at keeping you cool, it's February right now I know but my last hybrid mattress used to get my hotter. The delivery service was fantastic and thank you Paul in customer service for changing the delivery date for me and following my slightly complicated instructions - give the man a raise!

  36. She's a keeper

    Review by Roger L (Posted on February 05, 2017)

    I was impressed with the websites claims - as the mattress has a risk free 60 night sleep trial I decided to go ahead and make the purchase. One week in and I think it's safe to say... she's a keeper, very happy indeed!

  37. Double size REM-FIT

    Review by Stanley D (Posted on February 05, 2017)

    Really good mattress. We made the purchase based on the cooling element of the mattress.we had a memory foam mattress before and like the feel it gives you.This was the first time we had tried a springs and foams mattress and can say it feels brilliant.My wife uses the sleep monitor and says it good to.

  38. Keep up the good work!

    Review by Sue (Posted on February 03, 2017)

    Highly recommend, very comfortable, good service.

  39. 5 Star!

    Review by Ben K (Posted on February 02, 2017)

    Since we received our new mattress we have struggled to get out of bed every morning, it's so darn comfy! Genuinely though, this is a top quality mattress, not only does it look awesome, it also provides awesome sleep. Love the sleep monitor too, this is also a very neat product, really insightful sleep data that has definitely made me consider my nighttime and sleep routines. 5 Star!

  40. Thrilled with the new mattress

    Review by Stacey O (Posted on February 02, 2017)

    Thank you thank you thank you - my sleep has transformed since receiving the rem-fit mattress!! My last memory foam mattress used to always get me hot and bothered, not to mention the support was rubbish too. This mattress is exquisitely soft around your bony bits but also really supportive, so you don't just sink in, hard to explain really. My advice is give it a try and you won't be disappointed, if you are... then send it back on the free trial.

  41. Very Impressed

    Review by Mike B (Posted on February 02, 2017)

    Love it . Comfy and great nights sleep. Monitor is very clever too!

  42. Buy with confidence!

    Review by Nancy D (Posted on January 29, 2017)

    Quality mattress! From the moment we unrolled it and watched it expand, you could just tell that this was no ordinary mattress. It reminds me of a sport brand, not a mattress brand. It has a very clever way of enveloping your body shape the second you lie flat. If my husband fidgets and moves in the night, unless he actually nudges me or pulls on the duvet, I can genuinely say I do not feel his movements... seriously effective spring system and something you won't get with mini springs, trust me we've already sent one of those back! The sleep monitor is not my type of thing but my daughter has given it's approval. Overall we are delighted with the REM-FIT mattress and I have been sharing the refer a friend discount code with all my friends!

  43. Love my new mattress!!

    Review by Kathy G (Posted on January 22, 2017)

    Recently purchased the King Size Rem-fit mattress with the bed sheet 300 pluS the tracker device. Can't tell you how impressed I am with the mattress. I used to regularly wake up hot and with a sore achy shoulder, since having the Rem-fit mattress my sleep has dramatically improved and I now wake up feeling like I've slept all night! I will be purchasing two more for my kids once I can afford it. I also purchased the wrist tracker which seemed extremely good value when comparing to other well known wrist tracker brands, works fine. Thank you Rem-fit!!

  44. Nice comfortable mattress

    Review by Stuart K (Posted on January 18, 2017)

    Good mattress and does a good job at combating heat. My wife loves it probably a bit more than me... I prefer quite a fIrm mattresses so for that reason I have to give it a 4 star, as it's probably more of a medium. Delivery was on time and the drivers were very courteous.

  45. Best sleep ever!

    Review by D Royale (Posted on January 12, 2017)

    Our old mattress was uncomfortable so we decided to buy a REM-Fit.....best nights sleep ever.....it is so comfortable, couldn't recommend it enough!

  46. Love our new sprung mattress

    Review by Robert J (Posted on January 04, 2017)

    We love our new mattress so much more comfortable than our last all foam mattress.

  47. Really pleased, very comfy

    Review by Julian C (Posted on January 03, 2017)

    I've been in the market for a decent mattress for a while now and decided to jump in with the REM-FIT sleep 400 mattress after trying lots out in various mattress shops - I just couldn't find one that felt right. The 60 night trial is a huge bonus, what's to worry about? I've been sleeping on the REM-FIT for over three weeks now and can safely say I won't be sending it back. I am very happy as is my partner with this purchase, I give it 5 stars all the way. The only thing I might say is that the mattress does smell quite strong after opening it, the smell was completely gone within a week and barely noticeable after the second night, so not a big deal at all. We also really like the sleep monitor and regularly compete on who had the best night sleep, it's somewhat addictive trying to better your average sleep score and actually very interesting to see what you're doing in you're sleep.

  48. Amazing mattress

    Review by Tim G (Posted on January 03, 2017)

    We love this mattress, it's so comfy and relaxing and the sleep monitor is very informative and easy to use with my Android phone

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