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REM-Fit® 400 Hybrid Zoned Mattress

Medium / Firm

The award-winning REM-Fit 400 memory foam mattress that won't heat you up. Infused with cool gel and combined with pocket springs.

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From £299.40 Regular Price £499.00
As low as
/ month
Absolutely perfect sleep - Good Housekeeping
"The six layers combine to provide a comfortable mattress which contours the body, offering brilliant support."
Good Housekeeping Institute

Sleep on it, jump on it and everything in between - it's yours for 100 nights to fall in love with. If it's not right for you, we'll collect for free and refund you in full.

Free next working day delivery when you order before 1pm & free day of choice delivery. Old mattress disposal can be selected at the checkout.

Buy now, pay whilst you sleep. Finance your REM-Fit with DivideBuy. 0% APR financing as low as £31/month. Apply at the basket or checkout page

We're so confident in the build quality that we have included a 15-year full replacement guarantee at no extra cost - so you can sleep soundly for years to come!

Why Choose REM-Fit?

Tall Pocket Springs

Premium Pocket Springs

Through rigorous testing, our sleep researchers found that springs below 8cm in height provided inadequate support and failed to isolate partner movement. For undisturbed sleep & superior support, REM-Fit mattresses only use tall, authentic pocket springs 14cm-16cm high.

Weightless Pressure Relief

Weightless Pressure Relief

Our Mediflex memory foam layer which sits beneath our cool-gel infused memory foam layer is designed to gently absorb the weight of your body. This, coupled with our hypoallergenic stretched outer fabric, results in what is often described as a feeling of weightlessness.

Cool-Gel Infused Foam

Cool-Gel Memory Foam

Our unique layer of cool-gel infused memory foam provides advanced temperature regulation as well as supreme comfort. Overheating during sleep is one of the key reasons for unexplained waking during the night, disturbing our sleep cycles and affecting our overall rest & recovery.

Tired of Sleeping Hot?

Tired of Sleeping Hot?

REM-Fit mattresses are infused with cool-gel so they won’t heat up! Cool gel prevents the memory foam from holding onto the heat, keeping your sleep environment at just the right temperature. Trial the REM-Fit 400 mattress for 100-nights and start sleeping better!

Why our mattresses are rated so highly

REM-Fit Mattress 400 Layers
REM-Fit Mattress 400 Layers

Why not give it a try?

Sleep on it, jump on it and everything in between - it's yours for 100-nights to fall in love with. If it's not right for you, we'll collect for free and refund you in full.

Why not give it a try?

All returned mattresses are directly collected and donated to our partner charity - The British Heart Foundation.

"Great Mattress, very comfortable and keeps me nice temperature. Very reasonable price as well!"


Love it! REM-Fit mattress keeps me cool in the summer, and warm in the winter.


Comfort is in the detail
Construction and materials
  • Award-Winning Multi-layered hybrid construction

  • 50mm cool-gel infused memory foam comfort layer

  • 20mm Mediflex memory foam for pressure relieving comfort

  • 1000 (14cm high) encapsulated premium pocket springs provide a gentle & supportive tension

  • 140mm high edge-to-edge support walls prevents the side of the mattress from sagging over long-term use and provides supportive tension tight to the edge of the mattress

  • 40mm high-density foam base foundation layer - making the mattress suitable for all base type

  • Re-Ax thermos-regulating hypoallergenic knitted mattress cover

  • Removable, washable mattress cover

Size and Weight

UK Mattress Size & Weight

Single25x90x190 cm25.5 kg
Small Double25x120x190 cm31.9 kg
Double25x135x190 cm35.8 kg
King25x150x200 cm41.2 kg
Super King25x180x200 cm47.7 kg

EU Mattress Size & Weight

EU Double25x140x200 cm38.5 kg
EU King25x160x200 cm44.5 kg
Delivery Information
  • *Free next day or day of choice delivery to the UK addresses

  • Orders must be placed before 1pm for next working day delivery

  • 2-Person delivery service | Room of choice - additional extra

  • Old mattress removal - additional extra

  • Delivered rolled & boxed for your convenience

  • AM delivery slot (8am - 12pm) - available to choose when checking out

  • Saturday morning delivery (8am - 12pm) - available to choose when checking out

Don’t just take our word for it...

  • REM-Fit Evening Standard

    Evening Standard

    "This is a great mattress"

  • T3 Magazine REM-Fit

    T3 Magazine

    "it's extremely comfortable"

Our mattresses fit all types of bed...

Adjustable Bed

Divan Bed

Platform Top Base

Slatted Bed Frame

How firm is the 400 mattress?

The REM-Fit 400 is classified as a medium - firm tension mattress and is suitable for all shapes, sizes and sleeping positions and will perform perfectly up to a max weight of 20 stone per sleeper (max 2 sleepers). The top two layers of the mattress are made up of cool-gel infused memory foam. Combined, these two layers provide a sumptuous feel, preventing pressure build-up occurring around your shoulders, hips and knees. The next layer in the mattress is made up of 1000 individual 14cm tall premium pocket springs, providing zoned support and comfort. Each spring responds and moves independently to the next spring, effectively isolating partner disturbance movement, ensuring you sleep blissfully throughout the night. Trial the REM-Fit 400 for 100-nights completely risk-free. Guarantee 15 years.

How does the 100-night trial work?

We provide a risk-free sleep trial on all our mattresses. This allows you to sleep on a REM-Fit for 100-nights in the comfort of your own home and really put it to the test! There are no catches. If the mattress, for whatever reason doesn’t live up to your expectations, you can send it back for a full refund. There are no collection charges either! View more info here.

How long does delivery take?

We can deliver your new mattress the very next working day providing you place your order by 1pm on. You can select a chosen day for delivery if the next day isn't suitable. We have suit of delivery options to choose from when checking out including weekend and guaranteed AM slots.

Why are REM-Fit springs superior to your counterparts?

Unlike our counterparts we use tall pocket springs constructed from triple tempered steel. Each springs is contained within it's own pocket of fabric which prevents the spring system from rubbing against each other, nothing worse than a squeaky mattress! Tall pocket springs compared to mini springs provide superior support and will isolate partner disturbance movement more effectively; And don't worry about feeling the springs through the mattress, you can't, we place them deep beneath the top layers of the mattress so that they are never noticeable.

What base can the mattress go on?

Thanks to the high density foam layer of the mattress you can confidently use the mattress on any bed base including adjustable beds!

I have a bad back - will this mattress help?

As non medical professionals we make no guarantees that the mattress will improve your back complaint. However, we have designed our mattress range with a focus on back support. We have also received lots of positive feedback from sleepers who have suffered with a bad back to discover that sleeping on a REM-Fit has relieved their pain and enabled them to get a great night's rest.

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