Ergoflex 5G Mattress Review

A true memory foam mattress - is it right for you?
Last Updated Apr 2024
Ergoflex pioneered the bed-in-a-box phenomenon here, and have so many loyal customers who, over the years, have purchased different generations (versions) of their beds and loved each one. Today I'll be reviewing Ergoflex 5G, their latest memory foam mattress which launched in 2016.

Ergoflex 5G Mattress

Our Verdict
A true memory foam mattress of extremely high quality. Memory foam isn't for everyone, but if it is for you then this is one you don't want to miss!
What we like
  • A whopping 9cm of true viscoelastic memory foam mattress of very impressive density
  • Machine washable Tencel cover
  • Ergoflex's Cool-Sleep Airflow system helps mitigate some of the temperature retention expected in memory foam mattresses
  • Not for hot sleepers
  • Very short trial period of 30 days

Who is Ergoflex? 

Ergoflex is one of the oldest players in the bed-in-a-box market, meaning their beds are probably the only ones to have stood the test of time (and to be old enough to outlive their ten-year warranty!) They launched in 2006 in the UK and have been in Australia since 2010. They are also long time partners with Rize Up, who support victims of family violence, an issue dear to my heart. 

Ergoflex originated as a direct competitor to major memory foam mattress manufacturer, Tempur, and were one of the first bed makers to use an online-only, direct to customer business model using only premium materials to provide comparable quality at about a third of the cost. 

Where are their mattresses made? 

Ergoflex uses only their own formulations of high-quality memory foam in their beds, and in doing so control the quality of their foams which are made in China. It is difficult to find beds manufactured here rather than overseas, but it’s very understandable that manufacturers decide to do so to remain price competitive. 

What is Ergoflex’s mattress made out of? 

Ergoflex is truly a memory foam mattress. There are many other hybrid memory foam mattresses on the market, and some call themselves memory foam mattresses but simply have polyurethane foam with some characteristics of memory foam. Ergoflex uses true viscoelastic foam which is temperature sensitive, and is jampacked with spherical cells. You definitely want to try it out, but do note that Ergoflex’s 30-day trial period is substantially shorter than most manufacturers.

The bed is anti-bacterial, naturally anti-allergenic and anti-dust mite, in addition to being certified by CertiPur-US and OKEO-TEX, so we know that independent parties have verified that there are very low levels of Volatile Organic Compounds (VOCs) and absolutely no chemicals such as formaldehyde. And it features a washable cover for added hygiene.  

The Ergoflex 5g is 23cm in height and weighs in at 39kg for the queen. It’s comprised of three layers of foam. The base is a high resilience polyurethane foam, followed by 5cm of egg-shell shaped “Cool-Sleep” polyurethane foam, topped by the pièce de résistance, the 9cm high-quality memory foam. Let’s sink in!

Tencel Cover

Ergoflex have provided a breathable surface in its removable Tencel outer cover layer that you can cool machine wash at 30 degrees celcius. Tencel is a fantastic material. This cushioned cover is good for the environment as it can be sourced from sustainably sourced woods, uses non toxic chemicals in production, and produces such little harmful waste in the processing. It’s also antibacterial and hypoallergenic. Ergoflex’s Tencel outer cover has vented mesh panels on each end to allow airflow through the bed, keeping you cooler. 

I’m surprised more bed makers don’t provide a removable cover, let alone a washable cover, but Ergoflex have hit this one out of the park. 

Protective Inner Cover

This inner cover holds and protects the foams that make up the mattress. This isn’t a removable cover, and its sole purpose is to protect the foams and help them last even longer. It’s an extremely thin sock-like cover, which is great as it means that it won’t interfere with your body heat being transferred to the temperature sensitive, viscoelastic memory foam. That means that it won’t stop the memory foam from acting as it’s designed to do. 

Visco-elastic Memory Foam

Ergoflex’s priority is quality, and their claims that their high density visco-elastic memory foam is truly high density holds up. Unfortunately Ergoflex will not reveal the density rating. Regardless the Ergoflex mattress you get today will still have very high density memory foam. For comparison, the average density you would find in a mattress is around 30kg/m3. High-density foam is heavier than another similarly sized foam of a lower density rating because it’s jam packed with the foam material. Ergoflex’s open-cell memory foam will have smaller, more tightly packed air pockets. The result is more support for you (as there are more of those spherical open cells, with less room between these cells so the foam holds up better), and a much more durable bed. The foam using open-cell structures also helps with airflow to regulate your temperature throughout the night, but this temperature regulation might not be enough for very hot sleepers.

When you sink into Ergoflex’s orthopaedic bed, the memory foam layer conforms to your body shape perfectly, relieves any pressure points in your body, and manages to be so soft, yet so supportive at the same time. They claim to relieve fibromyalgia, back pain, joint pain and circulation problems. Now I don’t personally have these chronic medical conditions, but there are countless reviews from happy customers who testify to pain relief after sleeping on the Ergoflex 5G. If you do struggle with these chronic conditions and you’ve already tried everything else, perhaps it’s worth giving the Ergoflex a shot seeing as it’s not an adjustment that’s medically invasive. 

Another aspect of true memory foam is its low motion transfer. The Ergoflex has come out with some pretty fun ads of tractors and horses galloping all over the mattress without causing a glass of wine sitting on the same mattress to spill. This is minimal motion transfer. If you, a light sleeper, sleep with a partner who tosses and turns all night, Ergoflex’s high-density memory foam will solve all your relationship issues. 

Cool-sleep Airflow System

The second of the foam layers is the Cool-sleep Airflow System. This egg-shell patterned layer of polyurethane foam with its ups and downs works to allow air circulation through the core of the mattress, taking body heat away to regulate your temperature throughout the night. 

It also works as a transition layer to cushion you from feeling the firm base layer through the high-density memory foam.

This temperature regulation system is definitely helpful, and it does keep you cooler compared to most foam beds. However, it just can’t compare to the amount of airflow in a layer of springs. It’s simply in the nature of memory foam and high-density foam to retain heat. So while most sleepers will find this layer to be effective enough in regulating temperatures throughout the night, hot sleepers may find that the Ergoflex isn’t quite as suitable for them as an innerspring bed. 

High Resilience Foundation Layer

The bottom 9cm layer of high resilience polyurethane foam supports the other memory foam layer as well as the Cool-Sleep Airflow layer while they support you. This firm base layer means that your body weight is spread out more evenly and in the long run, the mattress is more durable. And we know this firm foam layer works because unlike other bed-in-a-box brands, the Ergoflex 5G has actually outlasted its 10 year warranty period with loyal customers for life!

Ergoflex Mattress Dimensions and Weight

The queen size Ergoflex mattress weighs 39kg, and is 152cm wide, 203cm long, (standard Australian queen size), and 23cm thick. You won’t want to move this around by yourself, so make sure that you have a partner or friend to help you unbox it.

What is the firmness of the mattress?

Memory foam, particularly true viscoelastic memory foam such as Ergoflex’s, is not easy to pinpoint on the firmness scale as its level of firmness will vary at any particular point. This is due to the memory foam layer being temperature sensitive, so it will feel firmer in a cold room compared to a warmer room temperature.  

Back sleepers and stomach sleepers will love this bed as it is so supportive. Side sleepers may potentially find it a bit too firm, though sleepers of all sleeping positions have left reviews and comments swearing fealty to Ergoflex. The Ergoflex is suitable for sleepers less than 114kg, or a combined weight of 190kg. If you weigh more than this, you will find that you’re feeling the bottom foundation layer of resilience foam, rather than getting the benefits of the top memory foam layer. 

Generally speaking though, the mattress will be around a medium firm level of firmness, so sleepers who prefer a softer mattress might benefit from a mattress topper. Compared to other memory foam mattresses, the Ergoflex probably has a higher level of firmness. 

The edge support of the Ergoflex is better than that of most foam mattresses, as it only sinks at the very point the pressure is applied. Ergo, the great motion isolation of the Ergoflex. That said, spring mattresses that have springs right up to the edge will generally perform better in terms of edge support. 

What was the buying experience like? 

The Ergoflex 5G is available online from Payment options through the website include credit card (with secure transactions via Eway), as well as Afterpay and ZipPay. Alternatively you can visit Ergoflex’s showroom just outside of Maitland in the Hunter Valley where you can see and feel the bed, ask the Ergoflex team questions, and drive away with your own new mattress if you fall in love with it.

Delivery of the Mattress

While Ergoflex do charge a delivery fee, they can offer next day delivery if you place your order before 2pm Mon-Thurs dependant on where you live (eg if you’re in a metropolitan location).

For metropolitan Sydney and Melbourne, the delivery fee is $29.99, while for Perth it costs $59.99, so you will need to check your postcode for delivery options and fees. 

For an extra fee on top of that ($89.99 for metropolitan locations) you can opt for your delivery time to be after hours or on a Saturday. To take up this option, you will need to choose this selection upon checking out and contact Ergoflex directly. Unfortunately, there are limitations on delivery services in some areas including regional WA, far north QLD, and NZ. 

Ergoflex Unboxing

The box opens along the length of the box! Now, while this seems like a very mundane detail, I’m kicking myself for not having considered this possibility – you can literally tip and roll the mattress out onto your bed base, rather than have to pull the whole mattress out through a narrow opening. 

Customer Service

The person who answered my phone call answered practically straight away, was knowledgeable, and very helpful with his advice. I also sent an email via the website’s form on a Saturday night, and received a message back the next morning! Matthew was so polite and explained everything clearly. I’ve never had such a prompt response to my emails, particularly over the weekend, so I was extremely impressed. 

My next email took couple of days more days before I got a response, but that’s still among the faster responses I’ve received from any bed manufacturer. 

Warranty – Anything to watch out for? 

Ergoflex offer a 10 year warranty on their mattresses against materials or workmanship defects. As I mentioned earlier, they have actually been around longer than their warranty period, something most bed-in-a-box manufacturers can’t claim. 

Make sure you register your mattress guarantee on the Ergoflex website within 30 days of receiving your bed, otherwise your warranty may be affected. 

What is covered

Any indentations of the memory foam layer more than 1 inch that isn’t due to a sag in the foundation, box spring, platform or cool sleep layer. This doesn’t increase the natural softening of the foams due to age or due to normal breaking in as the bed will still relieve pressure points as it was designed to do. 

The mattress cover is only protected for a 2-year warranty, rather than the full ten year warranty. 

The warranty only applies to the original purchaser. Keep your invoice and do not remove the tag as it identifies the lot number. 

What isn’t covered

The Ergoflex is not suitable for sleepers more than 114kg, or a combined weight of 190kg. 

Most bed frames can be used with the Ergoflex, including adjustable beds. However, do note that the mattress should not be used on the ground, or with slatted bed bases where the slats are too far apart (the slats should be at least 4cm across and at most 7cm apart), as the Ergoflex mattress works best on a flat, stable platform. It may be a good idea to contact Ergoflex to check that your bed base will be suitable. 

The Ergoflex is happy for Aussies to use an electric blanket, however you should only use it on a low heat. Be careful to not use it on a high heat as that will affect the temperature sensitive memory foam.

Ergoflex does not guarantee that their bed will assist with chronic medical illnesses. 

Warranty Process

To make a warranty claim, make sure you have your invoice and that you’ve registered your guarantee on their website form. Then contact Ergoflex either by calling 1300 791 753, or use their contact website form. 

Returns – How are the beds disposed? 

Any returned beds are sent to Ergoflex’s long time charity partner RizeUp. Rize up works to fight domestic violence through educating the community as well as helping victims of family violence. Knowing that beds aren’t going to waste and are going to help families in the midst of tragedy, terror and suffering puts me at ease. 


The Ergoflex 5G is a fantastic memory foam bed made only of premium materials, and I absolutely love it, but it won’t be for everyone. Ultimately, how suitable Ergoflex is for you comes down to whether or not you love the properties of memory foam. The HD visco-elastic foams will contour perfectly to your form and support all your pressure points and won’t have any motion transfer, but that also means that the Ergoflex will retain heat and won’t bounce or be as responsive as a spring mattress (or even other foam mattresses). It’s priced higher than most foam mattresses, and priced similarly to other bed-in-a-box hybrid innerspring mattresses, but that also reflects the extremely high quality and density of the foams used. So in terms of value for money it is very competitive, especially compared to brands such as Tempur. 

If you do try the Ergoflex, keep in mind that there is an adjustment period if you’re accustomed to spring beds. In this regard, Ergoflex’s 30-day trial is a bit short, but definitely make the most of it and give it at least 3 weeks before deciding whether it’s right for you. 

Ergoflex 5G Mattress

Our Verdict
A true memory foam mattress of extremely high quality. Memory foam isn't for everyone, but if it is for you then this is one you don't want to miss!
What we like
  • A whopping 9cm of true viscoelastic memory foam mattress of very impressive density
  • Machine washable Tencel cover
  • Ergoflex's Cool-Sleep Airflow system helps mitigate some of the temperature retention expected in memory foam mattresses
  • Not for hot sleepers
  • Very short trial period of 30 days

Related Articles