Ergoflex Mattress

Ergoflex Mattress Review UK (2022)

Written by Kim

Last updated: 31.07.2022

5 Min.

Ergoflex is the UK’s original mattress-in-a-box brand, established in 2006.

This is a premium memory foam mattress.

Could it be the best mattress for you? 🤔

We'll help you decide in this Ergoflex mattress review.

Let's take a look. 👇

Top features of the Ergoflex 5G mattress

Firm and supportive
Firm Mattress
Memory Foam
Machine-Washable Cover
30-day trial period
30-Day Trial Period
10-year guarantee
10-Year Guarantee


  • Orthopaedic support.
  • Great for couples.
  • Hypoallergenic.
  • Durable.
  • 10-year warranty.


  • Only available directly from Ergoflex.
  • Short trial period.
  • Awkward to rotate.

What makes the Ergoflex mattress special?

  • Ergoflex is the original bed-in-a-box mattress & the only brand that has been in existence for longer than its guarantee time.
  • Ergoflex uses the highest-grade foam density amongst memory foam mattresses.
  • The Ergoflex mattress is asthma- and allergy-friendly.

Ergoflex mattress composition

The Ergoflex 5G mattress is a high-density memory foam mattress.

It is about 23 cm (9 inches) in height, including a 9 cm top layer of viscoelastic memory foam.

The Ergoflex mattress’s composition is easy to understand.

It is made up of 3 foam layers.

The Ergoflex 5G mattress includes:

  • 9 cm (3.5 inches) high-density viscoelastic memory foam for body-shaping comfort
  • 5 cm (1.9 cm) Cool Sleep airflow system for excellent temperature regulation
  • 9 cm (3.5 inches) high resilience foundation layer
Composition of the Ergoflex 5G mattress
The Ergoflex 5G mattress contains 3 foam layers.

The Ergoflex memory foam mattress is also sustainably made and OEKO-TEX certified.

This means that the materials used in the mattress are certified as being free from harmful chemicals. 🎉

The Ergoflex mattress also comes with an all-natural TENCEL® fabric outer cover.

This is a recent addition to Ergoflex’s offering, which we’ll look at it in more detail further down. 👇

The Ergoflex 5G mattress in a bedroom
The Ergoflex 5G mattress uses a unique proprietary foam.

For now, let’s talk about Ergoflex’s unique proprietary foam. 🙌


Ergoflex mattress’s foam layers

Ergoflex memory foam layer

Their unique foam, called ACPT foam, is designed with billions of spherical shaped open cells.

Ergoflex’s unique foam has orthopaedic pressure-relieving properties. 🤸

Cool-Sleep™ airflow layer

This is the thinnest section, made up of spiky-shaped foam to allow cooler air to pass through.

The cooling layer of the Ergoflex 5G mattress
The Cool-Sleep airflow layer allows cooler air to pass through the foams

High-density foam base

The base layer at the bottom of the mattress is important but sometimes overlooked.

The high-density layer of the Ergoflex mattress is firm and supportive.

The Ergoflex mattress is designed to be used on beds with a strong base. 🏋

It can also be used with slats if they are spaced less than 7 cm (3 inches) apart.


Who is the Ergoflex mattress best suited for?

Most bed-in-a-box mattresses are designed to suit a wide variety of people and body types.

But, we’ve found that different mattresses are better suited to certain types of individuals. 🙋

The Ergoflex mattress is a good choice for:

  • Couples and light sleepers (very low motion transfer)
  • Asthma and allergy sufferers
  • Any sleep position


The Ergoflex mattress is suitable for particular people

The Ergoflex mattress may not be the best choice for:

  • Combination sleepers (those who change position frequently)
  • Hot sleepers
  • People using electric blankets (not recommended for most memory foam mattresses)

The Ergoflex mattress is not suitable for some people

Ergoflex mattress firmness

The Ergoflex mattress is a medium-firm mattress, though it falls more towards the firmer end of the scale. 🧱

We’d place it at 7 out of 10 on the Sleep Hero firmness scale, where 1 is the softest and 10 is the firmest.

This makes it a great mattress if you sleep on your back as it is very supportive.

The Ergoflex mattress is a bit less supportive for side sleepers, but still very good. 👍

Ergoflex mattress firmness

Ergoflex states that their 5G mattress is ideal for sufferers of back pain, fibromyalgia, circulation problems or joint complaints. 👨‍⚕️

We’ll explain why further down. 👇

The Ergoflex mattress also remains firm over time, not softening or sagging.


How comfortable is the Ergoflex mattress?

Comfort is pretty subjective, but we can give you some guidelines on the Ergoflex mattress.

The Ergoflex mattress is very supportive and very comfortable.

It is particularly well-suited to those with back pain or joint conditions.

Two people with backpain in different areas
The Ergoflex 5G mattress is well-suited to those with back pain.

Why is the Ergoflex mattress good for back pain?

Memory foam is orthopaedic.

It moulds around you, supporting the curves and natural lines of your body. 💃

Memory foam gives optimal support and allows your muscles to relax.

The memory foam gives the mattress an overall feel of contouring and good pressure relief.

The foam layers will mould around your body and provide good support so you wake up without any aches and pains. 👌

Comfort according to build & sleeping position

The comfort you’ll experience on the Ergoflex mattress (or any premium mattress) will depend on your build and your sleeping position. 🧐

The Ergoflex mattress is a good fit for back sleepers of any build.

It’s great for back sleepers because it is a firmer mattress that gives you stability and support. 🏔

This allows your spine to remain straight while sleeping.


Firmness scale according to sleeping positions
The Ergoflex is a firmer mattress that’s perfect for back sleepers.

It is also a good fit for stomach sleepers because of this support and stability. ⚖️

The Ergoflex mattress would also be an excellent choice for heavier-weight side sleepers.

However, it may be a bit too firm for average-weight and lighter-weight side sleepers

Average and lighter-weight side sleepers may prefer a bed with a bit more give around the shoulders and hips.

Lighter-weight side sleepers may not be heavy enough to sink into the foams, which could cause misalignment and create tension and pain.

A side sleeper with a pillow
Lighter weight side sleepers may prefer a softer mattress.

If you are exclusively a side sleeper, you may want to consider the Simba Hybrid mattress, which is slightly softer and allows for more sinkage.

In general, people of very large builds should try to steer clear of all-foam mattresses, which are generally too soft.

Instead, stick to innerspring mattresses, which will be able to offer much better support.


Does the Ergoflex mattress sleep hot?

The Ergoflex mattress contains a bespoke cooling layer designed to increase airflow. ❄

When tested by Which?, it was found to be breathable and not especially warm to lie on.

But, memory foam is often a warmer material compared to other mattress choices. 🥵

Memory foam retains more heat than other materials.


Temperature regulation scale

Some customer reviews do indicate it to be warmer than expected despite the airflow system.

So, it may not be the best choice for hot sleepers. 🔥

Hot sleepers may prefer a hybrid mattress like the Simba Hybrid or a pocket sprung mattress.

These types of mattresses often sleep much cooler. 🥶

Is the Ergoflex 5G mattress good for couples?

The Ergoflex mattress is firm with extremely low motion transfer, making it great for couples. 👫

Motion transfer refers to movement carried through the mattress.

Low motion transfer means less sleep disturbances for you and your partner.

But, if you are the type to toss and turn a lot, you may find that sinking into the foam makes it difficult to change positions.

children jump on bed while parent sleeps
The Ergoflex 5G mattress has very low motion transfer/

If you are looking for something bouncy and easy to move on you should consider a hybrid mattress or pocket sprung mattress. 🦘


Ergoflex mattress cover

The Ergoflex 5G mattress features a machine-washable outer cover made from TENCEL®.

TENCEL is a sustainable textile made from the cellulose found in wood pulp. 🌳

It has moisture-wicking properties and high breathability that outperform traditional cotton.


the Ergoflex 5G mattress with bedding
The Ergoflex mattress cover is soft, durable and anti-bacterial.

It is also incredibly soft to the touch, with a silk-like feel. 🕸

Despite its softness, TENCEL is durable, strong, and anti-bacterial.

The Ergoflex mattress cover also features mesh panels on each end to allow better airflow. 🌬

Ergoflex mattress sizes

The Ergoflex 5G mattress is available in six different mattress sizes from their UK website. 🇬🇧

Their wide range of sizes include EU / European sizes, which are a perfect fit for IKEA beds.

It’s important to note that the Ergoflex 5G mattress is 23 cm (9 inches) high compared to the UK standard of 25 cm (10 inches) in height. 📏

Although this is a small difference, it may affect how your sheets fit the bed.

The Ergoflex 5G mattress comes in these sizes:

  • Ergoflex single mattress: 90 x 190 cm
  • Ergoflex double mattress: 135 x 190 cm
  • Ergoflex euro double mattress: 140 x 200 cm
  • Ergoflex king size mattress: 150 x 200 cm
  • Ergoflex euro king mattress: 160 x 200 cm
  • Ergoflex super king mattress: 180 x 200 cm
UK mattress sizes
The Ergoflex 5G mattress is available in both UK and European sizes.

Ergoflex 5G memory foam mattress UK prices

The Ergoflex mattress is competitively priced compared to other bed-in-a-box mattresses.

The Ergoflex mattress is most frequently compared to the Tempur mattress but comes in at just a third of the price. 🤑

(Note: prices listed below are standard prices excluding any current coupons & discounts)

£ 499
£ 739
£ 819
Super King
£ 939

Ergoflex discount codes

The Ergoflex 5G mattress is competitively priced in its category. 💸

Ergoflex do occasionally offer significant discounts.

We keep track of discounts on Ergoflex mattresses.

This means you can get the best buy but don’t need to spend your time searching. 🔎

We collect all mattress discounts on our discounts page.

We’ve also included all current Ergoflex discount offers throughout this article.


Ergoflex mattress delivery process

The Ergoflex mattress is only available directly from Ergoflex.

As a bed-in-a-box mattress, the Ergoflex 5G is delivered rolled-up and vacuum-packed in a compact box. 📦

Ergoflex mattress with box
The Ergoflex mattress is delivered in a compact box.

The majority of customers will be offered next-day delivery free of charge.

Ergoflex state they can usually deliver within 24 hours of the time of ordering.

You can also choose a specific future date when you place your order. 📆

You can have your Ergoflex mattress delivered on a Saturday for an extra cost of £35. 📫

It will only be delivered to your front door.

In a high-rise building, this means the front door of the building. 🚪


It is a heavy package at 32 kg (70 lbs) and a large box, so make sure you have help available if you need to carry it far. 💪

Once unpacked, your Ergoflex mattress will slowly expand to its full size.

This can take up to 48 hours. ⏰

What do I do with my old mattress?

Unfortunately, no old mattress removal service is available.

If you need help disposing of your old mattress, check out our mattress disposal guide.

Ergoflex trial period

Ergoflex offers a 30-night trial period.

This is lower than competitors like Simba or Nectar, which offer a one-year trial period. 📆

30 nights should be enough time for you to know if the mattress is right for you or not.

Ergoflex do require that you sleep on the mattress for at least 21 days before returning it.

Ergoflex mattress rating
Customers have given Ergoflex a 4.7-star rating on Trustpilot.

There are positives to a shorter trial period. 👍

Most significantly, the customer reviews you read are more likely to be accurate.

Most people review products early after buying or shortly after their trial period ends. 💬

So you can be assured that the 4.7-star rating Ergoflex mattresses have received on Trustpilot is an accurate representation. ⭐


Ergoflex guarantee

The Ergoflex mattress offers excellent durability and a 10-year guarantee period.

This is similar to other mattress brands with the exception of Dreamcloud and Nectar, which offer lifetime guarantees. 😮

Ergoflex is currently the only bed-in-a-box company that has been in business for longer than their guarantee period.

Regardless of guarantee period, you should consider changing your bed roughly every 10 years. 🛏

Should you buy the Ergoflex 5G mattress?

The Ergoflex 5G mattress is a highly-rated memory foam mattress that provides great comfort and support.

It is a high quality, sustainably manufactured, medium-firm mattress that offers orthopaedic support. 🏆

We can recommend the Ergoflex mattress for:

  • Couples as it offers low partner disturbance
  • Back sleepers of any weight
  • Lightweight side sleepers
  • Asthma and allergy sufferers

We would not recommend the Ergoflex mattress for:

  • Lighter-weight side sleepers
  • Those who change sleeping position frequently
  • Hot sleepers

If you’re not sure, you can make use of Ergoflex’s risk-free 30-day trial period.


Contact Ergoflex UK

Customer service: To contact Ergoflex Mattresses UK directly for complaints, support, or queries, please email them at, call them on 0800 024 1122, or complete their online web form. Ergoflex Support is available Monday - Friday from 9 am - 5:00 pm.

Registered office: Ergoflex Limited, 246 Park View, Tyne and Wear, NE26 3QX

Frequently asked questions:

  • Where are Ergoflex mattresses made?

    Ergoflex is a UK-based company.  

    They manufacture their mattresses in the European Union. 🇪🇺

  • Can you turn an Ergoflex mattress?

    Like most memory foam mattresses, the Ergoflex 5G mattress is not designed to be flipped. 🤸

    Ergoflex do recommend that you rotate the mattress regularly.

    You should rotate your mattress monthly in the first six months of ownership.

    Then, you should rotate it every 3 months thereafter. 🌀

  • Does the Ergoflex mattress smell?

    Like most memory foam mattresses, there is a smell when you first unbox the Ergoflex.

    This is called off-gassing. 💨

    It is completely safe and normal.

    The smell typically dissipates very quickly in a well-ventilated room.

    If you are very sensitive to smells, you may wish to sleep in another room for the first night. 👃

  • Can I buy the Ergoflex 5G mattress on Amazon?

    The Ergoflex mattress is only available directly from Ergoflex. 🎯

    At this time, you cannot purchase the Ergoflex mattress on Amazon or other retailers.

  • How long do Ergoflex mattresses last?

    Ergoflex mattresses are durable and long-lasting.

    A lot of their online reviews are from customers who have used their Ergoflex mattress for many years. ⏳

    Ergoflex also offer a ten-year guarantee that will give you peace of mind. 😌

    That being said, we recommend you change your bed every 10 or so years.


Let's be honest, writing and sleeping have always been my favourite activities. My favourite hoodie that I wore all through uni said 'All I want to do is drink coffee, create stuff and sleep' on it. Dreams really do come true! 

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