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Ergoflex 5G Mattress Review (2022 Update)

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In the crowded Australian online bed-in-a-box market, Ergoflex may be one of the less popular options, but it’s a high-quality memory foam mattress and probably the best we’ve tried. The company even goes on to claim that their mattress is a like-for-like alternative to Tempur Original supreme mattress, which costs three times its price (in our tests, we found the claim reasonably accurate).

The whole premise of a memory foam mattress is that it closely adapts to body contours for greater comfort – meaning your spine is more likely to be well-supported in a healthy posture and there are fewer chances of pressure points build-up. While all this is good, Ergoflex 5G mattress is better suited for sleepers who prefer a certain firmness and feel.

To find out if the Ergoflex mattress is right for you, read our full review.

ergoflex 5g mattress review

Mattresses are subjective products – what might be comfortable for one may not be the same for the other. So besides our objective tests and personal assessment, we also base the review on the consensus among customers and industry experts. We believe this is a more wholesome way of judging a mattress.

Review Summary:

Ergoflex 5G is a TRUE memory foam mattress, made from high-density foam, unlike other brands which often sell memory foam blends (mostly low density). The memory foam layer is also 9cm thick, almost double of what most brands offer.

In terms of firmness, the mattress is slightly on the firmer side of medium firmness (7/10). However, as you lay on the mattress, you gradually “melt” in the memory foam layer, experiencing a curve-conforming hug and the mattress softens to about 6.5.

The mattress has a characteristic memory foam slow sink-in “hug” or quicksand feeling (you sink in the mattress but not overly deep). It offers ample pressure relief and support, which most sleepers should appreciate, especially those looking for pain reduction.

One area the mattress stands out is the temperature regulation. Unlike typical memory foam mattresses, it doesn’t excessively trap heat and sleeps relatively cooler. The edge support is also decent and better than most foam mattresses,

That said, it might not be for everyone. 

Who may like the mattress?

Who may not like the mattress?

Tl;dr: Hands down, Ergoflex is the best memory foam mattress we’ve tried and tested. If memory foam is your thing or if you’re after a supportive bed that’s firmer than average and offers excellent pressure distribution, the Ergoflex 5G is worth considering. 

The memory foam’s deep compression and pressure-relieving characteristics, especially make it ideal for sleepers suffering from joint or back pain.

Ergoflex 5G

Ergoflex is a comfortable memory foam mattress that should suit most sleepers, especially those with back or joint pain. Click the button to save up to 30% on the mattress.

Fact Sheet

    • Outer cover is made from natural and breathable Tencel fabric.
    • 3-layer inner core encased in a protective sock: 9cm visco-elastic memory foam, 5cm corrugated transient layer and 9cm high-resilience foam base.
    • Max load capacity: 114 kg individual and 190 kg total.
    • CertiPur-US and OKEO-TEX 100 certified for very low levels of toxic chemicals.
    • 30-night risk-free trial.
    • Paid Australia-wide shipping – $24.99 for metropolitan locations, $69.99 for towns, and $299.99 for remote locations.
    • Delivery time: 1-day delivery in metros (Sydney, Melbourne, Brisbane and Canberra) and 4 to 10 days for suburbs.
    • Free mattress return pickup within a 50km radius of metropolitan locations. For the remaining areas, the pick-up fee is anywhere from $100 to $250. All returned mattresses are donated to charities.
    • 10-year non-prorated warranty.
    • Manufactured in China.

Firmness & Feel

When buying a mattress, firmness and feel are the two most crucial factors to look into. Now, let’s look into how firm the mattress is, how it feels, and how light, average and heavier folks would fair on the mattress.

How firm is the Ergoflex mattress?

Describing the bed’s firmness is always tricky, but it’s a bit more complicated in the case of memory foam. Memory foam mattress tends to soften due to body heat as you lay on it. So the mattress may feel a bit firm initially and gradually get more comfortable and softer.

Similarly, Ergoflex 5G is close to 7/10 on the firmness scale, putting it on the firmer side of medium firmness. However, once the top memory foam layer warms up (takes a couple of seconds), the mattress softens and feels close to 6.5, about medium in terms of firmness.

A quick note: Firmness is a subjective metric and varies from person to person depending on the body type, weight and even preferences. So what mattress a heavier person considers soft may feel firm for an average-weighted folk.

How was my sleep experience?

Ergoflex 5G mattress close up

For reference, I’m an average-built person – 5’10” and 72kgs. I’m primarily a side sleeper, but I tend to switch to back or side sleeping often.

Here’s what I make of the bed.

Initially, the mattress feels a bit firm, but as the memory foam layer activates, you sink in a bit, creating a feeling of weightlessness. You experience excellent support, pressure relief and even weight distribution in all sleeping positions. Sleepers with back or neck pain issues should particularly do well on the bed.

Side sleeping on the mattress was most comfortable. The mattress deeply contours to the curves of the neck and spine, reducing any pressure build-up while keeping the spine properly aligned.

Back and stomach sleeping was also comfortable, and I experienced good balance support and comfort.

I also noticed I was sleeping deeply and not switching between positions on this bed as I usually do. This is mainly due to the memory foam layer’s enveloping/hugging feeling, which restricts movement to an extent. You do not sink in too much or feel trapped but it’s still a bit restrictive, which active or combination sleepers may not prefer.

Lastly, I didn’t feel hot on the bed, and it was fairly temperature neutral similar to Koala or Ecosa.

I think if the mattress is right for you ultimately boils down to whether you like the feeling of memory foam or not (as per reports, 95% like the feeling).

Note: The mattress isn’t compatible with electric blankets like most memory foam beds. However, the mattress does sleep a bit warmer than traditional mattresses, warranting the need of a heated blanket.

What does the mattress feel like?

Ergoflex 5G has the classic memory foam feel. You get the slow response, low bounce, deep contouring, and hugging feel typical to memory foam. Many reviewers describe sleeping on the mattress as “sleeping on a cloud”, almost weightless.

As you lay on the bed, you tend to stay on for a few moments before gradually sinking into the memory foam layer. You tend to sleep more “in” the mattress rather than floating on the top, which also makes switching positions a tad bit difficult. The pronounced hug and supportiveness of the foam is what makes the mattress alleviate pressure points and promote proper spine alignment.

Through and through, you experience consistent and even support, unlike innerspring or hybrid mattresses, which predominantly offer support in areas where the springs are.

For lightweight (under 58 kg) & average-weight sleepers (58 to 104 kg)

The mattress is quite accommodating and light to average weight sleepers should find the mattress comfortable in most sleeping positions. This is mainly due to the relatively thicker and denser 9 cm memory foam comfort layer.

The layer evenly sinks and contours relative to the pressure exerted and weight of the individual. So a petite folk would sink in slightly while an average-weight person would sink in a bit more, but both would experience similar firmness. In contrast, lighter folks usually find hybrid or innerspring mattresses firm as they cannot exert enough pressure to engage the comfort layer properly.

For heavy-weight sleepers Over 105 kg

Heavier folks would likely find the mattress quite firm and may not do well on the mattress. This is because such sleepers would mostly max out the comfort layer and hit the transition layer, which is a lot firmer. Generally, an innerspring or hybrid mattress is better suited for heavier individuals as the metal spring coils offer more robust support.


Ergoflex 5G is a 9-inch thick all-foam bed featuring three distinct layers wrapped in a Tencel fabric: a 9cm visco-elastic memory foam comfort layer followed by a 5 cm temperature regulating corrugated layer, and finally, a 9cm high-resilience foam support core.

Now, let’s take a closer look at each layer and see how they impact the overall performance of the mattress.

ergoflex 5g mattress construction

1) TENCEL Removable Outer Cover – Breathable, washable and hypoallergenic. TENCEL is an organic fabric that’s moisture-wicking and naturally anti-bacterial. It’s quite stretchy and doesn’t clump or bunch up, either. Further, its mesh design improves the mattress’ breathability.

ergoflex 5g Outer fabric
Ergoflex 5g Outer cover washing instructions

2) Micro-Fine Protective Layer – Poly fabric sock to protect inner foam layers.

Ergoflex 5g Mattress Removable Cover

3) Visco-elastic memory foam [9cm] – The high-density and relatively thick top memory foam layer is the key highlight of the mattress. 

This temperature-sensitive layer slowly responds to pressure and closely contours to body shape and supports the body, resulting in quality pressure relief and deep body contouring. At the same time, the open-cell structure of the PU foam helps air flow circulation between layers and keep things cool and breathable.

The company claims the memory foam used is almost two times denser than brands in a similar price range. Generally, higher density foam offers closer body contouring, better support and pressure relief while being more durable.

4) Transition layer [5cm] – Ergoflex refers to this patented layer as “Cool-Sleep airflow system”. The corrugated design of the foam encourages airflow and helps with regulating temperatures, especially valuable on hot and humid Australian nights. This layer is slightly firmer than the top layer.

5) High-Resilience base layer [9cm] – The support core is an impact-resistant dense PU layer that offers durable support and gives the bed its shape.

The mattress uses CertiPur-US certified foams and OKEO-TEX® 100 certified fabrics, which mean they’re produced in a non-volatile environment, free from harmful chemicals.

One important thing to note here is that similar to Tempur, Ergoflex no longer mentions the density of foam used. However, as a point of reference, the earlier variant Ergoflex 3G used 75 kg/m3 foam. 

The company also recommends rotating the mattress from top to bottom every three months for even wear.


Ergoflex is a comfortable memory foam mattress that should suit most sleepers, especially those with back or joint pain. Click the button to save up to 30% on the mattress.

Size Options And Price Chart

Size Dimensions (LxWxH) Weight *RRP
Single 187 x 92 x 23 cm 24 kg $949
Long Single 203 x 92 x 23 cm 26 kg $989
King Single 203 x 106 x 23 cm 28 kg $999
Double 187 x 137 x 23 cm 37 kg $1,349
Queen 203 x 152 x 23 cm 39 kg $1,529
King 203 x 183 x 23 cm 41 kg $1,649
* Ergoflex runs 30% OFF across all sizes pretty much throughout the year. During sales, the discounts can go up to 40%.

Mattress Performance

Sleep temperature


Memory foam is notorious for trapping body heat and feeling warm while sleeping. However, Ergoflex’s unique construction and choice of materials make it fairly temperature-neutral. Most average folks shouldn’t find the mattress hot, but people who naturally sleep hot may struggle.

Being a memory foam mattress, how does Ergoflex achieve this, you may wonder? First, Ergoflex uses open-cell memory foam, which is more breathable than closed-cell foam. Further, the mesh Tencel cover and corrugated foam transient layer promote airflow, preventing sleepers from getting too warm.

With that said, if you sleep too hot at night, you may want to opt for an innerspring mattress or an active cooling mattress with gel infusion or water cooling technology.

Motion isolation for couples


Ergoflex mattress excels at motion isolation, which really isn’t a surprise. Memory foam is superior to any other material when it comes to isolating and localising the motion transfer. This means that sleepers are unlikely to get disturbed by their partner’s movement as there is little motion transfer across the surface. 

Motion isolation is definitely the key strength of the Ergoflex mattress, which couples and light sleepers would appreciate the most.

Edge support


The Ergoflex 5G mattress offers fairly good edge support, especially when compared to all-foam mattresses. The support isn’t as sturdy as you get in innerspring mattresses, but it’s reasonably stable. You don’t feel like you’ll roll off the bed while sleeping or sitting along the perimeter unless you’re a heavy person (above 100 kg).

The key to Ergoflex 5g mattress’s above-average edge support lies in the transient and supportive base layer. The top memory foam layer easily compresses under weight, but the bottom two layers provide adequate resistance to prevent too much sinkage along the edges.

Sex comfort


Those looking for a mattress for sex would want a bed that’s responsive and bouncy as it allows to switch positions easily. Ergoflex contains a relatively thicker memory foam top layer which offers little to no bounce making it not as conducive for sex. Also, as one tends to sink into the mattress, couples could feel restricted.

However, the deep sinkage also means the mattress offers good traction, which can be more comfortable for couples who don’t tend to change positions for a prolonged period. Also, being an all-foam mattress, it makes no creaking noise and is completely discreet during sex.



Unlike most bed-in-a-box brands, Ergoflex has been in business longer than its warranty period (10 years). In our research, we actually came across several customer reviews who have used the mattress for over 10 years and reported no sags. This matches with our observation as well.

Generally, foam density is the indicator of the durability and longevity of the mattress. And considering Ergoflex mattress is made from high-density foam, the expected lifespan of the mattress is 8 to 10 years which is excellent for all-foam beds.



Right out of the box, buyers can expect mild off-gassing from the Ergoflex 5G mattress similar to all-foam beds like Koala or Ecosa. Most buyers reported the smell dissipates in a day or two.

All-foam beds tend to emit VOCs during the first few days, giving them the characteristic “new mattress odour”. These VOCs aren’t considered harmful and shouldn’t be bothersome for most people unless one is highly smell-sensitive.

Company Policies

When buying a mattress, it’s equally important to go over the fine print. We’ve outlined Ergoflex’s policies on warranty, sleep trial and returns.

Ergoflex mattress package

Delivery (S&H)

Ergoflex 5G mattress is shipped vacuum-sealed in a compact box. The mattress is noticeably heavier than most all-foam beds, and it’s a good idea to seek a helping hand while setting up the mattress. Once removed from the box, it will take roughly 4 hours to unfurl and take shape.

The shipping is paid and depends on the location. For metropolitan locations, Ergoflex offers 24-hour delivery and the delivery cost is $24.99 ($89.99 for Saturday or after-hours delivery). For suburbs, the delivery cost $69.99 and for remote locations, it’s $299.99 and takes four to ten days for delivery.

Free shipping for mattresses is more like a norm these days but that’s partly due to the healthy margin the brands enjoy. As a result, they’re able to absorb the delivery fee. However, considering the value the Ergoflex 5G mattress offers and how heavy it is compared to other competing brands, we think the delivery fee isn’t a big con.

Sleep trial

Ergoflex may have pioneered the risk-free mattress trial, but the company doesn’t offer the most generous trial in today’s market. Upon purchase, you’ll have 30 nights to decide if the Ergoflex 5G memory foam mattress suits your needs, although you’ll only be able to return it after night 21 (due to the adjustment period most people endure when changing mattresses).

This may seem a little off-putting, but reports indicate that Ergoflex is more than happy to extend the trial period if asked. It’s still no challenger for, say, Ecosa’s 100-night trial or Koala’s 120-night sleep trial, but 30 nights (with a potential for an extension) is better than nothing.

Return policy


Mattress return is free within a 50 km radius of metropolitan locations (Adelaide, Brisbane, Melbourne, Perth and Sydney). For regional areas, a return fee is applicable anywhere from $100 to $250.

The return fee for remote locations is standard across most bed-in-a-box brands and not limited to Ergoflex.

Only one return request is applicable per household. The return requests must be logged with Ergoflex within 30 days of delivery of the mattress.

Note: The returned mattresses must be unsoiled and without any damage. Ergoflex may request a picture of the mattress before initiating the return process.


When it comes to warranty, Ergoflex boasts the unique position of being the only Australian bed-in-a-box company that has proven the real-world test of its 10-year warranty. Ergoflex was launched in Australia in 2010 and has been in business for over ten years, unlike most new-age online mattress brands.

The warranty covers any material or workmanship defects and visible sags of over 1 inch or 2.5 cm. Furthermore, the removable cover is protected by a 2-year warranty against manufacturing or material defects. Ergoflex, at its discretion, will either repair or replace the mattress and a shipping/inspection fee may be applicable.

Note: The mattress must be registered with Ergoflex within 30 days to claim the warranty – Link.

Buyer Feedback & Complaints

We assessed over 250 genuine customer reviews in an effort to gauge how real Australian customers felt about the Ergoflex 5G mattress. How did they feel? Pretty good, it seems! The consensus is positive across the board…

  • 94% of customers asked, found that the mattress caused no discomfort. 
  • An overwhelming 98% of customers reported absolutely zero sagging in their experience with the mattress. 
  • 84% of cool customers claimed to experience no heat retention in the mattress.
  • Finally, a surprising 83% of customers reported adjusting to the mattress in a matter of days, with another 10% adjusting in the following weeks

Customers praise the supporting and pain-relieving qualities of the bed, with one customer claiming to have “purchased three, one for each room”. They elaborate, saying “they are so supportive especially for back, hip, neck problems”. Another Australian customer agrees: “I suffer with a bad back and find it very hard to get a comfortable mattress. This memory foam mattress gives me the best sleep I have had for 25 years. Only took 2 nights to realise this. Just brilliant.”

Ergoflex’s customer service also receives its time in the limelight within customer reviews. One customer, who fell victim to delivery issues, praised Ergoflex for keeping them informed and reported how the company “always answered emails and phone calls quickly”.

One customer, while pleased with the bed, warns against sitting on the edge in the same spot; they claim it “may affect firmness”, although this concern isn’t shared by the vast majority of consumers.

Summing It Up

The Ergoflex 5G is a top-notch quality mattress that is not only durable but also quite reasonably priced, as well.

If you’re in the market looking for a memory foam mattress, Ergoflex is definitely one of my top picks, and I do recommend it.

Ergflex 5G

Ergoflex is a comfortable memory foam mattress that should suit most sleepers, especially those with back or joint pain. Click the button to save up to 30% on the mattress.


This is what Dr Ritesh Jain has to say:

“Contrary to popular belief, sleepers looking for back pain relief should look for a medium-firm mattress (rather a firm mattress) that promotes healthy spine alignment. 

Memory foam mattresses are usually the best options for back pain because they conform to the body, offering personalised support while cradling pressure points. So it’s safe to assume, Ergoflex mattress should help alleviate back pain. However, it’s always a good idea to seek professional medical advice first to see if there is an underlying medical condition.”

The Ergoflex mattress is a bit firmer than medium firmness and about 7/10 on the firmness scale.

Yes, but the slats shouldn’t be more than 2.5″ or 6.35cm apart.

No, the mattress isn’t designed to be used on the floor.

No, the mattress is manufactured in China.

Yes, you can, but try to pick a thin mattress protector so that the mattress’s performance isn’t impacted. Ergoflex recommends using their own mattress protector for best results – link.

James Lee

James Lee

James is the content director at WhatASleep, a certified sleep science coach from Spencer Institute and our in-house sleep product expert. Over three years, he's personally tested hundreds of mattresses. He likes to keep his reviews simple, objective, and straightforward so that the readers don't have to go through decision fatigue which is often the case while shopping for sleep products.

He hails from Sydney and has a journalism degree from the University of Queensland and an MBA from Melbourne Business School.

Ergoflex Mattress


WhatASleep Score

Support: 4.5/5
Cooling: 4.2/5
Durability: 4.5/5
Trial Period: 3.5/5
Warranty: 4/5

Up to 30% OFF

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