Ergoflex 5G Mattress Review

Last Updated August 21, 2023
Ergoflex 5G Mattress Review



The Highlights

You need back pain relief
You like a firm mattress
You want a tried & tested mattress

Take Note

You want a long trial period
You are budget-conscious
You want a hybrid mattress
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Why we love the Ergoflex 5G:

Ergoflex is a UK-founded company that came to the Australian market in 2010. Their main goal was to build a high-quality mattress, but at a much cheaper price point than luxury mattress brands (like Tempur). Overall, they've done a great job at offering a high-quality memory foam mattress in a box product at a very reasonable price point.

While Ergoflex might not be the most well-known or popular mattress-in-a-box product, it certainly should be. It’s one of the highest-quality memory foam mattresses on the market, and arguably the most comfortable. A typical memory foam mattress is designed to adapt to your unique body comforts, offering a well-supported spine and better posture.

Not many memory foam mattresses truly offer all these features – except the Ergoflex 5G which is made from high-density foam. Similar products in the market typically use memory foam blends, which are low-density. Not to mention the memory foam layer on the Ergoflex 5G is 9cm thick, which is almost twice as thick as many competitors.

Who’s Going to Love The Ergoflex 5G Mattress

  • Back pain relief: If you’re after excellent back support/back pain relief, the Ergoflex 5G is the ideal mattress with top of the line back support.
  • Firm mattress: As a full memory foam mattress, it’s on the firm side so if you are after a firm mattress you’ll likely love the Ergoflex 5G.
  • Tried & tested: As a mattress-in-a-box brand that’s been around for 10+ years, it’s truly a tried and tested mattress.

Read more: What’s the Best Mattress for Back Pain?

Who Should Consider Alternatives To The Ergoflex 5G Mattress

  • Trial period: With a 30 night trial period, this mattress offers the shortest trial period. So, if you think you’ll need longer than 30 nights to find out if the mattress is right for you, the Ergoflex 5G might not be the best fit.
  • Budget: It’s not the most expensive mattress, but it’s certainly not a budget mattress. However, you get what you pay for!
  • You want a hybrid mattress: If you want a bouncier mattress or one with inner springs, the Ergoflex 5G is not the right mattress for you.

The Ergoflex 5G Mattress Video Review

The Ergoflex 5G Mattress Firmness

The Ergoflex 5G mattress is medium-firm (although slightly on the firmer side). However, as you lay on the mattress, you’ll begin to feel yourself sink into the mattress – but not uncomfortably so. It’s more like the feeling of the mattress hugging you.  

Is Ergoflex 5G Mattress Good For Larger (100kg+) People?

The Ergoflex 5G mattress is suitable for people who weigh up to 114kg or have a combined weight of 190kg. For lightweight (under 58 kg) & average-weight sleepers (58 to 104 kg), the Ergoflex 5G mattress is very accommodating. For heavier sleepers over 105kg, you might find the mattress quite firm and not enjoy it so much. Generally speaking, we recommend an innerspring or hybrid mattress for heavier people as the metal spring coils offer greater support.

What Does The Ergoflex 5G Feel Like?

The mattress offers exceptional levels of pressure relief and support, which most sleepers would appreciate. It’s especially rated for its ability to reduce pain. Plenty of customer reviews describe sleeping on the mattress as “sleeping on a cloud”.

Is The Ergoflex 5G Cooling?

The Ergoflex 5G has a specially engineered Cool-Sleep airflow layer at its core. This helps maintain a comfortable sleeping temperature by preventing warmth from building up within the mattress.

How Is The Edge Support Of The Ergoflex 5G Mattress?

Edge support

The Ergoflex 5G mattress has decent edge support, especially in comparison to other memory foam mattresses. What makes it above average is its transient and supportive base layer. The top memory foam layer compresses under bodyweight, yet the bottom two layers provide strong resistance to prevent too much sinking along the edges of the mattress.

Motion isolation

Memory foam mattresses are certainly superior when it comes to motion isolation, and the Ergoflex mattress excels at it due to its 9cm high-density memory foam layer. 

How Is The Responsiveness Of The Ergoflex 5G Mattress?

Being a memory foam mattress, it’s not as responsive as a hybrid mattress. In saying that, I’m a combination sleeper and found it easy to move from stomach to side to back when sleeping on the Ergoflex 5G.

Motion Isolation: Is It Good For Those Who Share A Bed?

The Ergoflex 5G excels in motion isolation, making it an excellent choice for couples. The only couples it wouldn’t suit are those with a combined weight of over 190kg. 

Related: What’s the Best Mattress for Young Couples?

Ergoflex 5G Mattress Construction

The Ergoflex 5G is a 9-inch thick high-density memory foam bed with three main layers wrapped in a Tencel fabric: a 9cm visco-elastic memory foam comfort layer, then a 5 cm temperature regulating corrugated layer, and 9cm high-resilience foam support core.

Cover Layers: The top cover is made of TENCEL® material that wicks away moisture and is very breathable. Below this is an inner protective layer of micro-fine fabric.

Layer 2: The first comfort layer is 9cm layer visco-elastic memory foam. This is what contours the body to provide a “weightless feeling”, hugging your body and relieving any pressure or body pains.  

Layer 3: The next comfort layer is 5cm of Cool-Sleep Airflow foam, featuring an egg-crate design to allow hot air to escape from the surface layer during sleep. This layer also helps isolate motion, reducing partner disturbance during the night.

Layer 4: The bottom layer is 9cm of High-Resilience Foam, which provides exceptional spinal support.

How Much Does The Ergoflex 5G Mattress Cost?

Long single $1,049
King single $1,089
Double $1,399

Shipping & Unboxing Of The Ergoflex 5G Mattress

For the vast majority of customers, Ergoflex offers next-day delivery. It also costs a minimum $29.99 for standard delivery, which isn’t obvious until you check out. When the mattress itself is already quite pricey, and most other mattress providers ship for free, it’s interesting Ergoflex decides to charge for shipping.

Ergoflex 5G Mattress Warranty Information

The Ergoflex has a 10 year warranty and has pretty standard inclusions against defects in workmanship and materials.

The will be replaced or repaired, at our option, should it be found defective due to faulty workmanship or structural defects. This includes any deterioration of the main memory foam layers, with an indentation of more than one inch (1″) not associated with a sag in the foundation, box spring, platform or cool sleep airflow layer.

If such a defect appears during the ten years of this warranty, Ergoflex will either repair or replace the Mattress. This does not include normal increase in softness in the foam, which can occur during normal breaking in, or in lessening of the gradual recovery aspect of the foam.

Ergoflex 5G Trial Period & Returns

Where Ergoflex loses points is its 30 night trial period, which is significantly lower than most other mattress in a box brands, which offer 100+ nights. 

Returning a mattress is free within a 50km radius of the CBD from the following metropolitan locations: Brisbane, Melbourne, Perth and Sydney and a 30km radius of Adelaide, Canberra, Darwin, Gold Coast, Newcastle and Hobart. Returning a mattress is also free from the Central Coast, NSW. 

If you’re outside these locations, you can expect a potential return fee of between $100 and $250 may be applicable depending upon where you live.

Addressing Ergoflex 5G Mattress Complaints

The Ergoflex 5G has an overwhelming number of happy customers, but you can’t please everyone! Here are some of the more common Ergoflex 5G mattress complaints from customers.

Some say the mattress caused additional aches and pains, suggesting it was too firm for their liking. Some also suggest it’s not as supportive as they’d hoped.

Final Verdict

As a hybrid/spring mattress lover, I have to say the Ergoflex 5G was definitely an enjoyable mattress to sleep on. The high-density memory foam’s deep compression and pressure-relieving characteristics made it quite firm to start, but over 30 days and as my body got used to it, the memory foam layer continued to activate and mould to my body, creating this lovely feeling of weightlessness.

And, as someone with back and neck pain issues, I found the Ergoflex 5G did a great job in relieving those aches and pains throughout the night, allowing me to wake up relatively pain-free. If you want to know more about Ergoflex 5G Mattress visit

Looking for mattress reviews in Australia? We’ve got you covered! Our thorough comparisons ensure you find your ideal mattress. Visit for top choices and sleep soundly.


Read more:

Mattress type
Memory foam
Shipping location
Fastest Delivery
Next day
Warranty period
10 years
30 nights
Price (RRP)
Ally Burnie Head Dreamer Ally Burnie
Journalist, presenter and host based in Sydney with a passion for cooking, outdoor adventures, hiking, humanitarianism, and travel.

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