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REM-Fit 400 Mattress Review


Written by Kyle

Last Updated: 1st January, 2022

This REM-Fit 400 mattress review looks into all the features this hybrid mattress has to offer and at what price.

REM-Fit is taking an alternative approach when it comes to offering value to customers by focusing their range on delivering the optimal rest and recovery solution right here in the UK.

Let’s jump right under the covers and get this REM-Fit mattress review started (SUMMARY AT THE END)

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REM-Fit 400 Mattress Construction 

The REM-Fit Sleep 400 mattress is made up of 4 internal layers all cleverly designed and positioned to create the ultimate recovery atmosphere. This is then all nicely wrapped in a silky-soft cover.

As REM-Fit was born in the USA, all their mattresses are still being designed in America. However, REM-Fit uses CertiPUR certified manufacturers which in a nutshell means that the polyurethane foams used to go through voluntary testing, analysis and certification programme for the environment, health and safety.

remfit 400 mattress layers review
(Image credit: REM-Fit)

REM-Fit 400 Mattress Cover 

A key aspect one needs to look out for in a mattress cover is making sure that rest is not interrupted due to comfort. REM-Fit does a good job ensuring the rest remains peaceful as it includes a RE-AX fabric cover or thermo-regulating knitted fibre, which is very breathable and silky soft to the touch. The cover is also removable and washable making little mishaps little problems.

Another nice feature is the anti-slip base, ensuring the mattress stands its ground during intense movements.

If you enjoy a more natural approach to a mattress we have also done a complete REM-Fit Natural Mattress Review which utilises a Tencel blend in the cover.

rem fit 400 cover review
(Image credit: REM-Fit)

REM-Fit Mattress Layers 

1. Open-cell Memory Foam (5cm)     

What's exciting about this memory foam layer is it's open-cell. It is said to be 30x more breathable than regular memory foam. This creates an ideal sleeping climate and moulds to your body without causing heat retention and warming you up. The open-cell layer will keep you surrounded in ideal temperatures for optimal rest.

Memory foam is designed to cradle the shape of the body, giving you a floating sensation and universal comfort. This is in order to support and increase pressure-relieving comfort. Aimed at reducing sore shoulders and hips with the added support.

400 memory foam layer
(Image credit: REM-Fit)

2. Encapsulated Pocket Springs Layer (15cm)     

The REM-Fit 400 mattress utilises 2,000 tall, enclosed springs. The encapsulated pocket springs provide additional lower and upper back support with their design providing a balanced tension throughout the mattress.

Each spring responds independently and when maximum force is exerted, they can compress to 4cm in height. With no-roll-together technology both promoting a peaceful, uninterrupted nights rest. Allowing one partner to move without disturbing the other, as only their springs will compress and coil.

encapsulated pocket spring layer
(Image credit: REM-Fit)

3. Edge-To-Edge Support Layer (15cm)     

To ensure that the REM-Fit 400 is Providing consistent support and structure, the mattress is also fitted with a 150mm high edge-to-edge support foam layer. This encases the mattress like a box and protects the sides against wear or sagging. This wall allows you to sleep close to the edge without fear of falling off or with reduced tension.

polyurethane edge support
(Image credit: REM-Fit)

4. Dense Base Layer (4cm)     

With a high-density core base layer, every sleep is upon a strong foundation. This layer is placed just below the springs to make sure the REM-Fit 400 mattress stands the test of time.

remfit 400 base foam
(Image credit: REM-Fit)
(Video credit: REM-Fit)

How Thick Is the REM-Fit 400 Mattress?

The REM-Fit 400 mattress has a depth of 25cm ensuring traditional bed sheets will fit and has a maximum capacity of 20 stone per sleeper or 130kg per sleeper (based on 2 sleepers per bed).

REM-Fit 400 Mattress Firmness 

The REM-Fit is given a 7 out of 10 on the firmness scale. Between medium and firm. The top layer providing soft cradling comfort whilst the middle and lower layers provide a strong and structured supportive base that does not interfere with the comfort but supports it.

remfit 400 mattress firmness review
(Image credit: The Mattress Guide)

Usually, a medium feeling mattress should appeal to the majority of sleepers here in the UK but if you like your mattress on the softer side of things, head on over to our REM-Fit 600 Lux Mattress Review or alternatively for one of the firmest mattresses we have reviewed take a look at our REM-Fit 500 Ortho Mattress Review.

Aesthetics and Design 

Overall the mattress is very neutral with the exception of the purple wave running across the side, this gives it a more modern look to it and also differentiates REM-Fit from the overly used blue, grey and white competitors.

400 design
(Image credit: REM-Fit)

The REM-Fit is also suitable for various bases or beds including:

  • Slatted bases
  • Adjustable beds
  • Ottoman bases. 

REM-Fit Mattress Trial and Warranty 

The REM-Fit 400 comes with a 100-night-risk-free trial which allows you to return mattresses within the 100 days and receive a full refund. No questions asked, yes that correct. Simply contact customer services and they will assist. The idea is to allow customers to experience and live with their bed of choice, ensuring it’s the correct fit for them. 

All returned mattresses are donated to the British Heart Foundation.

The REM-Fit mattress also comes with a 15-year warranty, as a guarantee of its build quality that way you are also secured in the long term. Most of the mattress brands in the online bed-in-a-box industry offer a standard 10-year warranty so it's great to see a company push the envelope.

REM-Fit Mattress Delivery 

The REM-Fit also includes a free next day delivery option, within the UK, for customers' convenience. Whether it be next day delivery or day of choice, it is covered. Delivery is boxed and delivered to your door. Delivery slots are weekday mornings and Saturday mornings.

remfit 400 delivery review
(Image credit: REM-Fit)

Payment Options

REM-Fit accepts various payment methods. Including Amazon Pay, MasterCard, Paypal, Visa and Divide Buy. Divide buy being noteworthy in that it offers the customer a 0% interest-free credit for mattress purchases.

REM-Fit 400 Mattress Price and Sizes

The reason we are doing this REM-Fit 400 mattress review is to give you all the information and be as transparent as possible so you can make the correct choice when purchasing your next mattress, but we also know that price is a crucial factor when deciding which mattress to get.

Below we put together all the sizes and prices REM-Fit have to offer. These are standard prices make sure to have a look our DISCOUNTS HERE for big exclusive savings. 

SIZE DIMENSIONS PRICE (excl. discount code)
REM-Fit 400 Small single size mattress 75x190x25 cm £699
REM-Fit 400 Long small single size mattress 75x200x25 cm £699
REM-Fit 400 Single size mattress 90x190x25 cm £699
REM-Fit 400 EU single size mattress 90x200x25 cm £699
REM-Fit 400 Small double size mattress 120x190x25 cm £799
REM-Fit 400 Double size mattress 135x190x25 cm £869
REM-Fit 400 EU double size mattress 140x200x25 cm £949
REM-Fit 400 King size mattress 150x200x25 cm £949
REM-Fit 400 EU King size mattress 160x200x25 cm £1,049
REM-Fit 400 Super king size mattress 180x200x25 cm £1,049
*prices and availability may be subject to change 

REM-Fit Mattress Customer Reviews 

This REM-Fit 400 mattress review covers all aspects when looking for a mattress but we also want you to take a look at what some customers had to say about the REM-Fit 400 mattress. You can find these either on the site itself or from third parties.

REM-Fit 400 Mattress Awards 

Awards give mattresses in the UK credibility and accreditation. The REM-Fit 400 mattress received a GHI approval.

  1. Good Housekeeping Institute Approved


  • As REM-Fit focuses on sleep and recovery technology they offer a range of smart technology to keep you connected and informed about your sleep with ease.

Should I Buy a REM-Fit 400 Mattress? 

To conclude this REM-Fit 400 mattress review we have to say it is a great mattress making new technological advancements. Focusing on comfort, stability and recovery and managing all effectively. We would highly recommend if you are looking for a mattress that would help with recovery and also if you are looking for:

  • A medium to firm mattress
  • A mattress with fast delivery and excellent warranty
  • A hybrid mattress
Up to 50% OFF
remfit discount code voucher uk
REM-Fit Discount Voucher Code
Save up to 50% on mattresses and get 2 free pillows with every mattress order. | Save up...Show More
Save up to 50% on mattresses and get 2 free pillows with every mattress order. | Save up to 50% on pillows and mattress protectors. T&Cs apply. Show Less
REM-Fit 400 Mattress Review
Material Quality
Motion Isolation
Edge Support
Sex/ Bounce
Company Reputation
Value for Money
100-night risk-free trial
15-year warranty
Free delivery and returns
Washable cover
Sleep tech functionality
No mattress handles

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Material Quality
Motion Isolation
Edge Support
Sex/ Bounce
Company Reputation
Value for Money
Final Score


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