How good is the Ergoflex 5G mattress?

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 that 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.

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

How does the Ergoflex 5G mattress feel? 


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.


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”.


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 much does the Ergoflex 5G mattress cost?

Long single $989
King single $999
Double $1349


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.


You’ll find most mattress in a box brands haven’t even been in business as long as their warranty periods are. This is where Ergoflex is different. It has been in the market since 2006, so you can rest assured it’s a tried and tested mattress.

Several customers have reviewed the mattress and noted they’ve had their Ergoflex mattress for more than 10 years and haven’t experienced any sag. Considering the Ergoflex 5G is made from high-density foam, we feel confident saying it’s a highly durable mattress that will last its warranty period.

Sleeper type analysis

back sleeper

Overall, the Ergoflex mattress is a great choice for both back and stomach sleepers. Generally, back and front sleepers prefer a firmer mattress, which is why they’ll likely enjoy the Ergoflex 5G.

side sleeper

Side sleepers will also find the Ergoflex 5G to be very comfortable. Don’t let the initial firmness fool you – you’ll slowly sink into the mattress, and the top layers do a great job of cradling your hips and shoulders.

combo sleeper

Combination sleepers should also have a great sleep on the Ergoflex 5G. However, because of the high-density memory, sleepers who switch positions may find they need a bit more effort to move, but overall this isn’t a big deal.

How much weight can it hold?

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.

Is it good for couples?

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. 

Dimensions & weight

Single92cm X 187cm X 23cm24 kg
Long Single92cm X 203cm X 23cm25 kg
King Single106cm X 203cm X 23cm28 kg
Double137cm X 187cm X 23cm37 kg
Queen152cm X 203cm X 23cm39 kg
King183cm X 203cm X 23cm41 kg

Edge support & motion isolation

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. 


For the vast majority of customers, Ergoflex offers next-day delivery.

Final verdict after 30 sleeps

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.

Ergoflex 5G comparison

When it comes to Ergoflex 5G comparison, no other mattress in a box products really do compare, except perhaps Ecosa. Ecosa and Ergoflex have similar designs but different foam materials – but they feel remarkably similar to sleep on. And, when comparing by price, Ecosa is quite a bit cheaper, and it also has a customisation feature that allows you to tailor the firmness level to suit your body and needs. However, if you don’t need the customisation feature and are happy to spend a bit more, you certainly can’t go past the tried and tested Ergoflex 5G.