Established in 2006 with Thousands of 5* Reviews

Removable & Washable TENCEL® Woven Cover

Ergoflex^® 5G Mattress-In-A-Box

8235 Reviews

The Ergoflex^® 5G mattress is an orthopaedic memory foam mattress that moulds to the contours of your body. Regarded as Australia's #1 mattress for back pain, the Ergoflex^® 5G Memory Foam Mattress reduces pressure points, alleviates pain and improves sleep.

Next-Day Delivery & Free Returns^*
30-Night Home Trial^*
True HD Proprietary Foam
Cool-Sleep™ Airflow System
Naturally Anti-Allergenic
Removable & Washable TENCEL^® Woven Cover
Established in 2006 with Thousands of 5* Reviews

Our Price

MSRP

Saving $ with code

Mattress Size: 92cm x 188cm x 23cm

Buy Your Mattress

^* Free returns not applicable to some locations.

Experience the Ergoflex^® Difference

The Highest Graded
Mattress-in-a-Box

5th Gen True HD ACPT^™ Foam
for class-leading performance and longevity.

Cool-Sleep^™
Airflow System^®

Temperature-regulating inner
core layer for cooler nights.

Tried-and-Trusted
10-Year Warranty

For Perfect Support
and comfort

Accessible, Helpful
Customer Care

Award winning service. You can
speak to us every day of the
year by calling 1300 791 753.

Trusted Reviews from
Long-Term Customers

Our reviews are real, honest
feedback rather than
fleeting first impressions.

Anti-Allergenic

OKEO-TEX^® 100 Certified
Ideal for asthma & allergy sufferers.

What is the Ergoflex® Mattress-In-A-Box?

The Ergoflex Mattress-In-A-Box is a high-quality, orthopedic memory foam box mattress that offers incredible support and comfort. Made with Ergoflex's 5th Generation True HD Proprietary Foam, this mattress moulds to your body for optimal pressure relief — ensuring a great night's sleep, every night. The Cool-SleepTM Airflow System keeps things cool while the removable, washable TENCEL® cover is naturally anti-allergenic, making this the perfect mattress for allergy and asthma sufferers. Since 2006, Ergoflex has been a leader in the mattress industry with thousands of 5-star reviews, helping people get a good night's sleep Australia-wide.

Wondering what a mattress-in-a-box is? Unlike regular mattresses, a box mattress is compressed, vacuum-sealed and packed in a box for convenient delivery. Setting it up is super easy: just unbox it, put it on your bed frame, and watch it expand to full size in a few hours. This convenience and flexibility makes Ergoflex the best memory foam mattress for those looking for convenience and top-notch quality.

Ergoflex^® vs Regular Mattresses

Regular Mattresses

	Not made for back pain.
	Traps heat due to poor temperature regulation and airflow.
	Not anti-allergen or hypoallergenic.
	Noisy to get on and off the bed at night.
	Limited warranty or guarantee.

Ergoflex^®

	Made with True HD memory foam for exceptional orthopedic support.
	Features the Cool-SleepTM Airflow System to prevent hot, uncomfortable nights.
	Comes with an anti-allergenic TENCEL® cover.
	Whisper-quiet Visco-elastic memory foam to reduce partner disturbance.
	Reliable 10 Year Warranty.

How Do Memory Foam Mattresses Work?

Pressure-Relieving Support
For All-Night Comfort.

The Ergoflex^® 5G Mattress-In-A-Box is a 5-layer memory foam mattress crafted from premium materials designed to work together, delivering unmatched support, comfort and pressure relief.

The TENCEL^® outer cover offers a luxurious, breathable surface that feels natural and soft, while the micro-fine inner cover protects the mattress core.

On top, a 9cm layer of high-density visco-elastic memory foam contours to your body, providing exceptional support and eliminating partner disturbance for uninterrupted sleep. Beneath this, the Ergoflex^® 5cm Cool-Sleep^™ airflow system promotes air circulation and temperature control. Finally, the 9cm high resilience impact-resistant foundation layer supports the upper layers and ensures lasting durability.

What Size Mattress is Best For You?

Single
Mattress

92cm x 188cm x 23cm

Long Single Mattress

92cm x 203cm x 23cm

King Single Mattress

106cm x 203cm x 23cm

Double
Mattress

137cm x 188cm x 23cm

Queen
Mattress

152cm x 203cm x 23cm

King
Mattress

183cm x 203cm x 23cm

FAQs About The Ergoflex^® 5G Mattress-In-A-Box

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What To Consider Before Buying A Mattress

Support and Comfort

Picking a mattress is all about finding the right support and comfort. The Ergoflex^® 5G mattress has a multi-layer memory foam structure that's great for back pain. Its True HD memory foam contours to your body, offering perfect support and pressure relief. This means you get a comfortable, pain-free sleep. If you're unsure what level of support you need, our team can give you expert advice to help you find the perfect mattress.

Temperature Regulation

Nobody likes sleeping hot. Traditional mattresses can trap heat, but the Ergoflex^® 5G mattress has the Cool-SleepTM Airflow System to keep things cool all night long. This helps you stay comfy and enjoy a great night's sleep. Plus, with our convenient delivery, you'll be enjoying your new mattress in no time.

Allergies and Hygiene

If you have allergies or asthma, you'll want a mattress that's anti-allergenic. The Ergoflex^® 5G uses materials certified by OKEO-TEX^® 100 and CertiPUR-US, so it's free from harmful chemicals. Its TENCEL^® cover is naturally anti-allergenic and resists dust mites, mould, and bacteria, keeping your sleep environment clean and healthy.

With various mattress sizes available, you can find the perfect fit for your body with ease. Not sure how much support you need? Our team can provide expert advice about whether the Ergoflex^® 5G Mattress-In-A-Box is the perfect mattress for your body. Contact us today.

Ergoflex® 5G Mattress-In-A-Box Specifications

Materials & Certifications

Mattress: 9cm polyurethane HD memory foam.
5cm cool-sleep airflow system for temperature regulation.
9cm high resilience impact-resistant foundation base layer.
All foam CertiPUR-US certified.
Cover: 41% TENCEL^™, 59% polyester, STANDARD 100 by OEKO-TEX^® certified.
Protective inner cover.
No fire retardants used.

Sizes

Available in:
Single, Long Single, King Single, Double, Queen and King Size.

Single Mattress: 92cm x 188cm x 23cm, 24kgs
Long Single Mattress: 92cm x 203cm x 23cm, 24kgs
King Single Mattress: 106cm x 203cm x 23cm, 26kgs
Double Mattress: 137cm x 188cm x 23cm, 37kgs
Queen Mattress: 152cm x 203cm x 23cm, 39kgs
King Mattress: 183cm x 203cm x 23cm, 41kgs

In addition, we stock the following UK sizes:
UK Standard King (dimensions: 150cm x 200cm x 23cm), European King (dimensions: 160cm x 200cm x 23cm) and the UK Standard Super
King (dimensions: 180cm x 200cm x 23cm).

Delivery

Next day delivery to Sydney, Melbourne, Brisbane, Canberra, Newcastle & the Gold Coast. 3 days to Adelaide and 5 days to Perth. Earliest delivery dates to your postcode and delivery fees are calculated at checkout.

The sizes and weights of each carton are:

Single Mattress: 96cm x 37cm x 37cm, 24kgs
Long Single Mattress: 96cm x 37cm x 37cm, 25kgs
King Single Mattress: 110cm x 37cm x 37cm, 28kgs
Double Mattress: 141cm x 37cm x 37cm, 37kgs
Queen Mattress: 156cm x 37cm x 37cm, 39kgs
King Mattress: 186cm x 37cm x 37cm, 41kg

Usage

Suitable for use with most types of bed frames, even adjustable electrics or divans. Performs best on a completely flat, stable, or slatted base. Ensure slats are no wider than 7.5cm apart. Do not use directly on the floor or on a plywood board with no ventilation. Rotate the mattress (head-to-toe) through 180° every month for the first 6 months and every three months thereafter, to aid longevity.

Protect against water damage with the Ergoflex-LIFE^™ Tundra Mattress Protector.

Easy Care

TENCEL^™ cover: Unzip and remove the TENCEL^™ cover. Machine wash in cold water, delicate cycle. Lay flat or hang to dry. Do not use bleach. Always allow to dry completely before putting the cover back on your mattress. Tumble dry on low heat on.

Ergoflex^® mattress core: Spot clean by hand with mild detergent.

Dry at room temperature - avoid direct heat or light.

Return Policy & Warranty

The Ergoflex^® 5G Memory Foam Mattress is covered by a 10-year warranty. We offer a 30-night trial period and free return option from most metro areas. From regional areas a return fee of between $100 and $250 may be applicable depending upon where you live. The 30-night trial starts from the day your mattress is delivered and is limited to one return per household.

Zero Partner Disturbance,
So Everyone Can Get A Great Night's Sleep

Ergoflex^® Is The #1 Mattress-In-A-Box in Australia

Ergoflex^® has been setting the standard in the mattress-in-a-box market since 2006, almost a decade before many well-known brands emerged. We have stayed true to our mission of providing premium, long-lasting box mattresses exclusively online, offering great value without compromising on quality. With over 549 million nights of restful sleep delivered to hundreds of thousands of satisfied customers, we've built a reputation based on reliability and integrity.

Unlike other brands that started online, Ergoflex™ has remained focused on offering high-quality mattresses directly to consumers. While many brands boast 10-year warranties despite being relatively new to the market, Ergoflex™ stands out as the only mattress-in-a-box company that has been around long enough to prove our products' durability.

Our commitment to quality and customer satisfaction has been proven over the years, making us a trusted name in the industry.

Hygienic And
Anti-Allergenic

The Ergoflex^® 5G mattress features a multi-layered design with built-in anti-allergenic properties, making it inherently antimicrobial and resistant to dust mites and allergens. This includes bacteria, mould, mildew, and fungi—common triggers for allergies and asthma. It is certified by both CertiPUR-US^® and OKEO-TEX^® 100.

10-Year
Warranty

Ergoflex^® mattresses come with an industry-leading 10-year warranty. We stand out as the only mattress-in-a-box brand that has been in the market long enough to prove our warranty's reliability. Our long history of consistent performance assures you that our mattresses truly live up to their promises.

Sleep Now
Pay Later

We've partnered with AfterPay and Zip to offer flexible payment options. You can pay for your ErgoflexTM mattress in four fortnightly payments or choose an interest-free plan over 3, 6, or 12 months. Simply select AfterPay or Zip at checkout, and start enjoying your new mattress right away.

Real People. Genuine Unfiltered Reviews & Opinions

Many brands request customer feedback after just a few days. We think this provides an unrealistic amount of positive reviews. You'll find that many of our reviews are from people who have been sleeping on their Ergoflex^® mattress for years. They are people who have purchased more than once and have recommended us to many.

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On the land and waters that we sleep, we walk, and we live, we acknowledge the Traditional Owners and Custodians of these lands. We pay respects to Elders past, present and emerging, and recognise their connection to the land.

Ergoflex Australia, trading name of EAU Pty Ltd.
7/2 Sabre Close, Anambah Business Park, Rutherford,
NSW, 2320 ABN: 85 141 058 380

Ergoflex® 5G Mattress-In-A-Box

Experience the Ergoflex® Difference

The Highest Graded Mattress-in-a-Box

Cool-Sleep™ Airflow System®

Tried-and-Trusted 10-Year Warranty

Accessible, HelpfulCustomer Care

Trusted Reviews fromLong-Term Customers