Ergoflex 5G Mattress Review UK – 2022

Ergoflex 5G Mattress Review








Material Quality


Value for Money



  • A long-lasting company with a good reputation
  • Next day delivery and returns are free
  • Made from good quality materials such as a TENCEL cover
  • Offers a good range of different sizes


  • Shorter than average trial period (30 nights)
  • They do not offer old mattress disposal
  • The mattress can be difficult to turn as it has no handles

While you might not have heard of Ergoflex before they are one of the original ‘bed in a box’ companies. So early that they claim they were the first bed in a box manufacturer to be available in the UK. One of the major advantages of this is that they are one of the few companies that have outlived their mattress warranty, adding to consumer confidence.

Ergoflex was one of the first to adopt the online-only model which enables them to bring an affordable but high-quality mattress to the UK market. They have remained a relatively small company compared to some of the newcomers. Reviews speak for themselves though and it seems they have found a winning formula and they know how to provide a solid product from start to finish.

The Ergoflex 5G mattress is a memory foam mattress which is designed to fit the majority of sleepers. Coming in at an affordable price the mattress has a relatively simple but well-built design.

We have taken a closer look at the mattress to see what makes the reviews so positive. The mattress certainly has a lot going for it on paper.

Ergoflex 5G Product information


View the latest price at Ergoflex here.


Free Delivery and Returns


Memory foam

Mattress depth:





30-night comfort trial


10-year limited warranty

Existing mattress removal: 

Currently not available

Ergoflex 5g full
(Credit: Ergoflex)

Construction and Materials

In looking at the Ergoflex 5G it has a very slick, smooth design. It has a two-tone colour scheme with the top being white and the sides grey. This is very common but gives it a professional, luxury feel. 

Despite Ergoflex being a relatively old company in the market, they have kept up to speed with their competitors. Different generations of this mattress have been released over time with new technology advancements. The mattress has an impressive high-quality cover alongside a dense memory foam top. This is one of the most appealing parts of the mattress, especially at this price point.

Coming in at a total depth of 23cm, the 3 layers of foam are slightly thinner than the 25cm average. This is not a massive downside of the mattress as many similar mattresses have a much deeper base whereas here you are getting more of the high-quality foam on top.

Including the base, the Ergoflex 5G has a total of 5 layers, we have broken down each layer to examine their contributions to the mattress and the interesting pieces of technology that this mattress contains. These are the layers within the mattress:

1.TENCEL Outer Cover Layer

The design aim for the outer cover layer seems to have been to try and find a great balance between having a luxury finish and also make sure it is as breathable as possible. To do this Ergoflex have made the outer cover from TENCEL®. This is an alternative to cotton and has exceptional breathability and moisture-wicking abilities. TENCEL® is a natural and sustainable product which has great antibacterial properties.

The cover feels very luxurious and the construction material gives it stretchy and durable qualities. This makes it easy to remove the cover. Once removed it can be machine washed, making this mattress very easy to maintain, keeping it hygienic and fresh.

The only part that could be improved from our perspective is the inclusion of handles. While this mattress does not need to be flipped it does make it slightly harder when the time comes to rotate the mattress.

ergoflex layers
(Credit: Ergoflex)

2. Protective Inner Cover Layer

An addition to the newer generations of this mattress is the protective inner cover layer. This is a microfine layer which allows the cover to move freely while keeping layers beneath in place. It also acts as an additional layer of protection to the memory foam. The addition of this layer will extend the longevity of this mattress and prevent any defects for much longer.

3. High-Density 5G Memory Foam Layer (9cm)

The first foam layer of the mattress is a memory foam one. Made from Ergoflex’s high-density 5G memory foam this mattress is much thicker and denser than what is normally found on a mattress’s first layer of foam. This generally suits a lot of people and is generally found in medical settings in most of the world. As a result, the mattress has top levels of support and still retains the comfort aspect of memory foam. This foam is also specifically designed to have orthopaedic qualities such as pressure relief in key spots such as the shoulders and hips. This helps relieve muscle and joint aches and pains.

4. Cool-Sleep Airflow Layer (5cm)

Acting as a traditional layer between the top memory foam layer and the solid base layer is the cool-sleep airflow layer. This layer has a non-traditional shape which helps improve airflow and helps improve support to the key pressure points within the body. This is designed to keep you sleeping at an optimal temperature throughout the night. Foam is notorious for overheating and so this layer has additional air pockets which help regulate temperature.

5. High-Resilience Foam Base Layer (9cm)

The bottom base layer of the mattress is one of the most important. It allows you to get the most out of the above layers by providing a solid foundation on which they can sit on. This extends the longevity of the mattress and keeps it in good shape for much longer. This type of foam is very firm and gives the mattress an extra level of support, allowing for a healthy posture when sleeping.

ergoflex materials
(Credit: Ergoflex)

Comfort, Support and Sleep Quality

The Ergoflex 5G is rated as a medium-firm mattress, in terms of a 1-10 rating we would put it around a 6.5. As a result of using high-quality memory foam, the mattress does have a slight contouring effect which would be found in mattresses that are closer to medium. This does give it a luxury comforting feel though. Medium-Firm is a popular choice to make a mattress. Generally, it gives a fantastic balance between comfort and support. With the thick layer of memory foam at the top of the mattress, it has exceptional orthopaedic pressure relief and provides support to key joints such as the hips and shoulders. The deep memory foam layer on top also adds to the comfort of the mattress. It allows the mattress to conform and mould around your body. The firmness of the lower layers prevents you from sinking to an uncomfortable layer, however.

With the mattress being medium-firm it is developed to be able to suit a vast range of sleepers. It should provide what you’re looking for no matter what sleeping position you prefer.

Sleeping position can drastically change how it feels to sleep on a mattress, we have identified the most common sleeping positions and how this mattress should feel in them. Bear in mind that factors such as body shape and weight may change these.

When sleeping on the back, the shoulders and hips feel well supported. You can easily get into a comfortable sleeping position while maintaining good posture. Due to the orthopaedic qualities of the mattress pressure relief to the major joints is good and it does not feel as though you will sink into an uncomfortable level.

Ergoflex 5g corner sheet
(Credit: Ergoflex)

Side sleepers usually have trouble with firmer memory foam as they do not sink in enough to allow for good spine alignment. This is not the case with the Ergoflex 5G. The 9cm top layer of memory foam allows your hips and shoulders to sink in enough to get into good spine alignment. Even with this extra sink, the mattress has more than enough support to remain comfortable. 

If you sleep on your front/stomach then this mattress has just enough support to feel comfortable. The hips and shoulders will feel well supported. The spine is held in good alignment and the mattress conforms to your body due to the thick top layer of memory foam. If you are a larger front sleeper then you may want something slightly firmer, this is because this sleeping position needs the most support. This will be subjective and if this is the only thing putting you off then it is well worth testing it during the trial period.

Ergoflex has taken considerable steps to reduce overheating on this mattress by adding the Cool-Sleep layer and the TENCEL cover. These will do a good job of keeping your sleeping temperature cool. Most people will be able to sleep at a comfortable temperature with no issues with this bed. If you have had problems with sleeping very warm in the past then you may still have this problem with the 5G mattress. It is still memory foam and may tend to retain excess heat. If you are unsure about this then the 30-day trial period is the perfect opportunity to test this.

As is expected with an all-foam mattress there is very little motion transfer. This means that any movement from you or if you share your bed will not be transferred across the mattress. This is perfect for couples, especially light sleepers as you should not be disturbed by your partner’s movement in the night. As for the edge support, I would say it’s pretty good for a memory foam mattress but nothing special. 

Ergoflex 5g box
(Credit: Ergoflex)

Trial and Guarantee

A disappointing aspect of this mattress is that it only comes with a 30-day trial. This is significantly less than the average 100-day trial offered by companies such as Eve. While it is much lower than the average, a 30-day trial should be more than enough time to trial the mattress. It is much longer than the few minutes that would usually be spent testing the mattress at a shop. If you decide that this mattress does not suit you within this time then it can be sent back to Ergoflex for a full refund. This process is relatively simple and Ergoflex has a well-streamlined system in place for these refunds.

The Ergoflex 5G does come with a 10-year guarantee, this is a great show of confidence into the product and with the company now entering its 14th year you can have faith that this will be fulfilled for the entire time.

Ergoflex 5g weighless
(Credit: Ergoflex)


Ergoflex offers a free Monday-Friday delivery option for most postcodes within the UK. Once ordered delivery is relatively quick and they aim to deliver most orders to you the next day. If you are wanting Saturday delivery then this comes with a £35 additional fee. 

Due to using an external delivery company for deliveries, Ergoflex is currently unable to dispose of old mattresses. This can make getting rid of your old one tricky depending on where you live but most local councils will be able to pick this up. 

Upon delivery the mattress will come in a small box, it is compressed, rolled and vacuum sealed for delivery. This allows Ergoflex to save money on transport costs, making the mattress cheaper. 

Once removed from the packaging the mattress will begin to reach its normal size straight away. After a few hours, it should be at its full size and ready to use. 

While some mattresses that are delivered like this have a very strong smell. This does not seem to be the case with the Ergoflex 5G though.

Customer Reviews

Probably the smallest company we have taken a look at. They are also probably the highest rated on Trustpilot. Despite only just over 300 reviews, they have over 90% of their ratings regarded as excellent. This page can be found here.

Ergoflex 5g corner cover
(Credit: Ergoflex)

Available Sizes



UK Single
190 x 90cm
UK Double
190 x 135 cm
EU Double
200 x 140cm
UK King
200 x 150cm
EU King
200 x 160 cm
UK Superking
200 x 180 cm

Our Verdict

On the whole, this mattress is one of the top contenders within the ‘bed in a box’ market. While it may not be one of the most well-known mattresses, we can certainly see that the cost-saving of not running massive advertising campaigns can be directly transferred to the customer.

The fact that it is one of the few companies to exist past its warranty period speaks volumes and is a great added benefit. After all, if the company no longer exists then 

there is nobody that has to follow through with it.

The support and comfort provided by the mattress are similar to mattresses several hundred pounds more expensive. The fact that Ergoflex keeps updating the mattress with newer generations also shows their faith and dedication to this mattress. The mattress is hypoallergenic and naturally antibacterial can only help its cause.

Ergoflex 5g feature
(Credit: Ergoflex)

While being quite similar to other memory foam mattresses on paper we feel it is certainly small improvements and bits of technology that set this mattress apart.

There are not many downsides to this mattress but they are still worth mentioning. Not having a longer trial is the most obvious one and would help when comparing this mattress to others of a similar price. 

Also, the lack of handles is an inconvenience when having to move or turn the mattress.

Despite these, there is tremendous upside to this mattress and you are getting value for money when purchasing this product. As previously mentioned the actual downsides of the mattress are not in the materials or construction of the mattress. If you are not fully sure then the 30-day trial is still more than enough time to allow you to decide

This mattress has many very impressive features, to summarise this review, we believe that this mattress will be a great fit if you are looking for the following:

  • A reasonably priced memory foam mattress.
  • A mattress with minimal motion transfer (great for couples).
  • Good customer support and delivery product.
  • A mattress produced from top quality materials
  • A well-established brand who is one of the oldest in this market.