Ergoflex 5G Mattress Review

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Ergoflex 5G Mattress

From a company that’s been a part of the mattress industry for over 10 years, the Ergoflex 5G is the 5th version of its model. With this new and improved model, the Ergoflex 5G contains everything a person needs for comfortable, supported sleep.

We wanted to know if the Ergoflex 5G could live up to the hype. So, we ran our mattress through several rigorous tests. Today, we will share what we learned in our Ergoflex 5G mattress review so you can see if this is the right fit for you.

Ergoflex 5G Mattress Review: Our Rating

8.5Edge Support
8Motion Transfer
8Sex (Sinkage + Edge Support + Cooling /3)
8.11Overall Score

Learn more about our in-depth review process for our mattresses here.

Ergoflex 5G Mattress Review: Construction and Design

Our review of the Ergoflex 5G mattress starts with its construction and design, which is geared toward support and spinal alignment. It uses a Tencel cover, which I noticed had a soft, cool-to-the-touch feel. On top of this cover helping reduce heat, it’s also removable via zippers. I could take it off in less than 10 seconds and wash it, removing dirt, stains and keeping the mattress fresher.

Its first layer consists of 3.5 inches of visco-elastic 5G memory foam, which is thick and adaptive to the body. I found this layer to conform well to my spine and lumbar, especially on my back.

The second layer of the Ergoflex 5G is 2 inches of Cool-Sleep Airflow foam, made in the shape of egg crates. This allows for the flow of air, and I noticed there was a definite dispersion of heat. I never woke up to night sweats and stayed relatively temperature neutral throughout the night.

The base of the Ergoflex 5G consists of 3.5 inches of high-density, high-resilience foam. This creates a stable platform for the rest of the layers, and I found this layer did excellent for keeping me balanced and comfortable while lying down. “When testing the Ergoflex 5G, I found every area of my body was evenly weighted and lifted. I felt it was an excellent solution for back pain,” stated Eleanor Jones, the executive editor of The Independent.

Overall look of the Ergoflex 5G Mattress

Unboxing and Off-Gassing of the Ergoflex 5G Mattress

When I received the Ergoflex 5G, I immediately brought it inside and removed it from its box. The packaging caused the mattress to be deflated, but cutting it free of its plastic started the expansion process. It took about 4-5 hours for the mattress to expand when rolled out onto the bed frame.

There was some ‘new mattress’ smell when I initially unboxed the Ergoflex 5G, so I left it in a well-ventilated room while waiting for it to off-gas and expand. Unventilated rooms may struggle to dissipate the manufacturing smell quickly, which is crucial to remember if you have a new mattress.

For me, the Ergoflex 5G took just under 24 hours to fully off-gas to a point where I couldn’t detect any ‘new mattress’ smell. This is slower than the Koala by 23-22 hours, making the Koala a better option if you’re sensitive to off-gassing smells.

This slower-than-normal off-gassing speed earned the Ergoflex 5G a rating of 8 in this category.

Ergoflex 5G Mattress Firmness

Firmness is how soft or firm a mattress feels when lying down and affects everything from sinkage to pressure relief. It is a significant determining factor if a mattress suits you. When testing the Ergoflex 5G, I found its firmness to feel around a 7, considered a medium-firm. This is firm enough that I felt supported on my back and experienced enough cushioning when on my side. This is part of the reason why the Ergoflex 5G can be considered one of the best firm memory foam mattresses in Australia.

The Ergoflex 5G is 0.5 points firmer than the Koala, Peace Lily, and Emma Comfort mattresses we have tested. I would recommend the Ergoflex 5G as it is better suited to those who prefer a firmer sleeping surface and slightly less sinkage.

Ergoflex 5G Mattress firmness

Cooling of the Ergoflex 5G Mattress

The cooling capabilities of a mattress are essential for almost all types of sleepers, especially hot sleepers, as this helps draw away excess heat continually throughout the night. In my review of the Ergoflex 5G mattress, I found it wasn’t exceptionally cool. However, it did keep my temperature neutral. I recorded a temperature of 31.9 degrees Celsius while gauging this mattress.

The Ergoflex 5G uses a Tencel cover, which is naturally cool-feeling, and a Cool-Sleep foam layer made to channel hot air away from the body. The Ergoflex 5G cooling features help it keep night sweats at bay.

Ergoflex 5G Mattress cover
Ergoflex 5G Mattress cover

Comparing my other mattresses, the Ergoflex 5G was 0.3 degrees hotter than the Koala, 0.2 degrees hotter than the Emma Comfort, and 1.6 degrees hotter than the Peace Lily. The differences between the Ergoflex 5G, Koala, and Emma Comfort aren’t significant, meaning the Egoflex is still suitable for most sleepers. Temperature-sensitive sleepers may prefer a cooler mattress like the Peace Lily. We also have a list of our top mattresses for hot sleepers in Australia that may help.

I gave the Ergoflex 5G a rating of 7.5 in the cooling category as I found it was cool enough to keep my temperature neutral thanks to its cover and open-cell memory foam layers.

Ergoflex 5G Mattress Review: Sinkage

Sinkage is how soft and cushioning a mattress compresses under weight and strongly relates to how pressure-relieving and supportive the mattress feels. I recorded a sinkage of 2.19 inches, which was enough to allow my shoulder and hips to sink for pressure relief. However, I was more comfortable on my back as the Cool-Sleep air foam and resilient base supported me for excellent spinal alignment, and I gave this mattress an 8.5 for sinkage.

The Ergoflex 5G was 0.01 inches softer than the Emma Comfort, which is incredibly similar. That means both can provide pressure relief and weight redistribution, with the Emma Comfort feeling slightly firmer and the Ergoflex 5G better for soft ‘weightlessness.’ I would recommend the Ergoflex 5G to sleepers who prefer a more spongy feel to their mattress. “When testing out the Ergoflex 5G, I noticed it had a soft, or even spongy feel. I felt I sank in significantly due to its viscoelastic foam,” explained Chris Stead, an editor of Finder.

Response of the Ergoflex 5G Mattress

Response of a mattress is how quickly the layers recover from impressions, and it directly impacts how easy it is to change sleeping positions for combo sleepers and active couples. During my review of the Ergoflex 5G mattress, I noticed it was remarkably fast at recovering from impressions. This is likely due to its open-cell design, which prevents that ‘stuck in the mattress’ feeling many of the best memory foam mattresses are known for.

I measured a 0.3-second partial response from impressions and a 0.4-second fully recovered response. Typically, a measurement between 0.4 and 1 second is an excellent balance between slow-adaptive cradling and fast bounce-back for ease of movement. Due to this, I gave the Ergoflex 5G a rating of 9.5 for the response category.

Comparing the other mattresses I have tested, the Ergoflex 5G had a 0.1-second difference in reacting quicker than the Koala, making both similar. However, the Ergoflex 5G couldn’t quite keep up with the Emma Comfort mattress. It was slower than the Emma Comfort by 0.2 seconds, making the Emma Comfort the better choice in ease of movement.

Bounce of the Ergoflex 5G Mattress

A mattress needs a certain amount of bounce that compliments response and sinkage. The best mattresses in a box in Australia have a higher bounce level to keep you feeling buoyant and free to change sleeping positions, making using the bed easier for active couples.

The Ergoflex 5G falls slightly behind in this category, as its firmness for spinal alignment does not translate well to bounciness for ease of movement. I still found that I could change sleeping positions with minimal effort, but I could feel a slight non-responsiveness. This is typical of most memory foam mattresses.

From my tests, the Ergoflex 5G had a total bounce of 6.50 inches, which is lower than average, but still within the parameters to allow easy movement. Its initial impression was 3.88 inches, with a rebound of 2.62 inches. I gave this mattress an 8 for its bounce, as these results are slightly lower but still good.

The other mattresses I have tested to date have mostly higher bounce than the Ergoflex 5G. This mattress has 0.9 inches less bounce than the Koala, 3.26 inches less bounce than the Peace Lily, and 5 inches less than the Emma Comfort.

If you want a memory foam mattress with more bounce, the Emma Comfort may be worth considering over the Ergoflex 5G.

Bounce of the Ergoflex 5G Mattress

Edge Support of the Ergoflex 5G Mattress

A mattress’s edge support is vital to the integrity of its core and utilizing the entire width of the bed. A good edge support makes it easier to get out of bed in the morning and prevents the feeling of an unstable edge and potential falls. From my review, the Ergoflex 5G mattress has excellent edge support that aligns with the average of most memory foam mattresses, earning it a rating of 8.5 in this category.

Edge support of the Ergoflex 5G Mattress
Edge support of the Ergoflex 5G Mattress

The Ergoflex 5G’s highly resilient base is a great help in supporting the edges. I recorded sinkages of 3.6 inches while sitting on the edge, which is under the recommended maximum of 4 inches. This mattress is excellent for stability. I was secure while sitting and lying on the edge without feeling like I might fall out.

The Ergoflex 5G has a similar edge support as the Koala mattress. This mattress was 0.1 inches softer than the Koala, likely due to the Koala’s unique Kloudcell technology. However, this is a minor difference that won’t affect the performance of the Ergoflex 5G too much in this category.

Also Read: Emma Mattress Review

Ergoflex 5G Mattress Review: Motion Transfer

Motion transfer of a mattress affects how much motion the mattress absorbs and is especially helpful for restless partners and couples. The Ergoflex 5G is geared more towards firmness and spinal support, which means this firmer material does not absorb motion as well as softer memory foam models. However, it can absorb minor movements, making this mattress a suitable option if you don’t mind slight movements if a partner gets out of bed early.

During my tests, I recorded that the bed reacted to motion transfer at 5 inches between my compressions and my glass of water. This is slightly higher than average, but I found I was undisturbed while sleeping, and I gave this mattress an 8 for motion transfer.

Other mattresses I have tested earned slightly higher scores in this category. For example, the Ergoflex 5G is 1.5 inches less isolating than the Koala and the Emma Comfort. However, the Ergoflex 5G also performed better than the Peace Lily by 4.5 inches in the category. That means the Ergoflex 5G is a good middle-ground if you want a mix of spinal support and motion isolation.

Ergoflex 5G Mattress motion transfer

Ergoflex 5G Mattress: Performance for Sex

How well a mattress performs for sex depends on how well it scores in the sinkage, edge support, and cooling categories.

The Ergoflex performs moderately well in this category, with good sinkage and edge support ratings. However, I found it could have had better cooling, which has caused the rating for this category to drop slightly. There was ease of movement and stability with this mattress, so it would still be an excellent option for active couples.

Considering its performance in the other categories, I gave the Ergoflex 5G a rating of 8.

How It Feels for Different Types of Sleepers

Every mattress is a unique and personal experience for each sleeper. Keeping this in mind, I will explain how the mattress feels in different sleeping positions based on a sleeper’s weight and preference. For reference, I am an average-weight sleeper.

Side Sleepers 

The Ergoflex 5G provided enough cushioning for me to feel pressure relief on my side. My shoulders and hips could feel the firmness of this mattress, but there was still enough weight redistribution for me to feel comfortable.

Average and heavy-weight sleepers over 230 pounds should feel comfortably cradled while on their side. Lightweight sleepers under 130 pounds may not have enough sinkage to feel comfortable or may prefer more sinkage for better relief of the shoulder and hip areas. Other mattresses for side sleepers in Australia may be worth considering.

Side sleeping near the edge on the Ergoflex 5G Mattress
Side sleeping near the edge on the Ergoflex 5G Mattress

Back Sleepers

I felt well-cushioned on my back as I could feel the top visco-elastic foam layer compress under my weight and fill all of the areas of my lumbar, shoulders, and spinal areas. It was cradling and supportive, and I was most comfortable in this sleeping position. The Ergoflex 5G’s use of a highly resilient foam base greatly improves its ability to support the spine as I was relieved of muscle tension while on my back.

The Ergoflex 5G would suit sleepers of all weight categories while sleeping in the back position, from below 130 pounds to over 230 pounds.

Stomach Sleepers

When I was lying on my stomach, I noticed enough support to keep my hips lifted and my spine in a neutral position. Overall, I was comfortable. However, the mattress was slightly soft, which may translate poorly for heavier sleepers. This is because stomach sleepers need more support than sleepers in other positions to keep the spine neutral.

Light and average-weight sleepers will enjoy stomach sleeping with the Ergoflex 5G. However, heavier stomach sleepers over 230 pounds may want a firmer mattress to ensure their hips don’t sink.

Sleeping Positions: Summary

Sleeping PositionMy experience
Side SleepersI didn’t experience any significant discomfort while on my side, as my shoulders and hips had enough sinkage for pressure relief.
Back SleepersI was most comfortable on my back due to the High-Resilience foam base, and I experienced pleasant tension relief.
Stomach SleepersI was moderately comfortable on my stomach, and my spine remained neutral and tension-free.

Other Important Information 

There is other essential information to know about the Ergoflex 5G before deciding if it's the right mattress for you. Mainly, it’s good to know about its 10-year warranty, its delivery and returns process, its 30-night free trial period, and its certifications.

This mattress comes with a 10-year warranty that covers manufacturing defects, such as cracks in the foam or indents deeper than 1 inch. The company will replace or repair the mattress at no extra cost. That means the company behind the Ergoflex 5G is confident in their mattress lasting a long time, which can give you peace of mind.

The Ergoflex 5G and Koala mattresses share similar warranties, as both are for 10 years and cover indents deeper than 1 inch. However, the Ergoflex 5G’s warranty is shorter than the Peace Lily by 15 years. I would recommend the Peace Lily’s warranty to sleepers who prefer having as long of a warranty as possible.

The delivery and returns process for the Ergoflex 5G is relatively straightforward and convenient. Next-day delivery is offered for most metropolitan areas in Australia, which allows you to get your mattress shipped fast.

The one drawback of this mattress is that delivery is not free, which is a significant difference compared to the Koala and Emma Comfort mattresses, as they offer free delivery and returns.

If you want to return your mattress within the free trial period and live within or near a metropolitan area, the Ergoflex 5G comes with a free returns policy that will cover the cost of shipping. If the mattress is successfully returned, they will refund the mattress entirely. The only drawback is that the initial shipping fee isn’t repaid.

If a 100% refund that includes the initial delivery suits you better, it may be worth checking the Koala, Emma Comfort, and Peace Lily mattresses instead.

Most online mattresses come with a free sleep trial to let you test the bed and see if it’s comfortable. This makes online shopping much safer and gives you more options in finding the ideal mattress. The Ergoflex 5G comes with a 30-day free trial, slightly on the short end compared to other mattresses tested. You have to return the mattress quickly if you find it’s not the right fit, which can be challenging for people with busy schedules.

The Ergoflex 5G has a shorter sleep trial than the Koala by 90 nights, shorter than the Emma Comfort by 335 nights, and shorter than the Peace Lily by 70 nights. If you are confident you’ll like the Ergoflex 5G or have no issues handling a quick return timeframe, this mattress is still an excellent option. 

The Ergoflex 5G has Certi-Pur® & OKEO-TEX® 100 certifications. That means it’s free of harmful toxins and heavy metals and has low VOCs within the memory foam layers. It also uses safe, non-toxic fabrics and can be used by adults and children in the home. These certifications help with peace of mind when using the product around children and for everyday use.

The Certi-Pur® certification has nearly become an industry standard, as almost every mattress we have tested to date has this certification. Other mattresses that also have this certification include the Koala mattress and the Emma Comfort.

Also Read: Koala Mattress Review


The Ergoflex 5G is the 5th generation of an excellent mattress series, using thick, high-density visco-elastic memory and a resilient base. The Cool-Sleep Airflow layer helps add extra pressure-relieving qualities and draw heat away from the body. Overall, I was most impressed with the Ergoflex 5G’s ability to adapt intuitively to pressure. It ensured I had the freedom needed to switch sleeping positions easily.

From my review, the Ergoflex 5G mattress would best suit sleepers who want a modern-feel memory foam mattress and a slightly firmer bed. The mattress's firmness makes the Ergoflex 5G more resilient to weight over time, helping this mattress last in your home for years.

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