🇬🇧 United Kingdom · Memory foam vs Hybrid (foam & springs)

Ergoflex 5GvsTweak

Which one is best for you? Ergoflex 5G vs Tweak - 2026 comparison by Vs Mattress

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Ergoflex 5GUp To 50% OffTweakCheck current deal.

Ergoflex 5G

by Ergoflex · Memory foam

Up To 50% Off

10 · 30-night trial

Tweak

by Tweak · Hybrid (foam & springs)

Check current deal.

10 · 100-night trial

Pricing by size

Ergoflex 5G

Single£770

Double£966

King£1,055

Super King£1,175

Tweak

Single£595

Double£895

King£995

Super King£1,095

Essential information

	Ergoflex 5G	Tweak
Type	Memory foam	Hybrid (foam & springs)
Launched	2006	2014
Brand	Ergoflex	–
Made in	–	United Kingdom
Unique points	One of the oldest mattress in a box brands in the UK, the Ergoflex 5G comprises of: 9cm of genuine High Density Visco Elastic Memory Foam A unique Cool-Sleep airflow system perfectly designed for the UK climate A superior base layer for support and longevity of performance All combined with our luxurious TENCEL® outer cover for unrivalled comfort.	Four layer, customisable hybrid construction: 4cm foam 5 customisable comfort zones with 4 different densities of deep foam 10cm individual pocket springs (coil count: 1,000) The springs are encapsulated in a high density, supportive foam that makes up the base and the mattress walls. They're then covered in a medium density reflex foam that ensures you feel the bounce of the springs below. Note: This brand has changed hands so many times, it's hard know the current quality of the mattress.
Video	The Ergoflex® 5G Mattress	Tweak Hybrid Customizable Foam Mattress review - 2021

Certifications & trial

	Ergoflex 5G	Tweak
OEKO-TEX®	Yes	Yes
CertiPUR-US®	Yes	Yes
Certifications	CertiPur-US®, OEKO-TEX®	–
Other certification info	–	–
Sleep trial	30 nights	100 nights
Warranty	10	10
Free shipping	FREE	FREE
Free returns	YES	–
Pay later	Yes	No
Delivery info	For the vast majority of customers we offer next-day delivery completely free of charge. If your required item is in stock, we can usually deliver within 24 hours from the point that you placed your order. (If ordered Monday to Thursday before 14:00)	With no hidden charges, we offer all our mattresses with a free two man delivery service within 3 working days to mainland UK.

Firmness & feel

	Ergoflex 5G	Tweak
One firmness fits all	Yes	No
Select your firmness	No	No
Adjustable firmness	No	No
Half and half firmness	No	No
Flippable / reversible	No	No
Firmness info	The Ergoflex 5G mattress was meticulously developed to provide an optimum level of support and find that it performs for the vast majority of people, regardless of body type and sleeping style. This one "perfect" mattress, rated medium-firm uses the highest-quality materials available.	–

Construction & materials

	Ergoflex 5G	Tweak
Layers	9cm of genuine High Density Visco Elastic Memory Foam, A unique Cool-Sleep airflow system perfectly designed for the UK climate, A superior base layer for support and longevity of performance, All combined with our luxurious TENCEL® outer cover for unrivalled comfort.	foam, customisable comfort zones with 4 different densities of deep foam, individual pocket springs
Cover	Our TENCEL® outer cover provides a luxurious, natural and breathable surface which can be removed and machine washed whenever you wish. This combined with our premium foam means that you can be sure of a comfortable sleep night after night.	Hypo-allergenic, plush fabric cover. Our visco-elastic polyester blend cover provides a breathable sleeping surface. It's fire resistant and provides temperature control, plus it's hypo-allergenic making it ideal for those with dust or skin allergies. The zippable cover can be machine washed at 30 degrees and air dried, keeping your mattress fresher for longer.
Machine-washable cover	Yes	No
Ergonomic handles	No	No
Comfort	Ergoflex comparable only to TEMPUR® is technically more advanced and superior in performance to every alternative both in this price range and beyond. As a result it is renowned for delivering deep restorative sleep. It is recommended by Practioners for those that suffer from back pain, fibromyalgia, circulation problems and joint complaints or to those simply in need of a good night's sleep. The Ergoflex 5G consists of an unrivalled 9cms of open-cell 85kg/m³ high-density memory foam. Our unique Cool-Sleep airflow system encourages air to freely circulate thorough the mattress keeping you cool while you sleep. Our base layer provides perfectly weighted support for the upper layers and longevity of mattress performance.	The Tweak mattress (formerly known as the Nrem mattress) is designed to help all sufferers of chronic pain, including back pain. You can design your very own sleep experience by adjusting the foam tablets inside the mattress to give bespoke comfort and support to suit your specific pain needs. Pressure relieving, cooling comfort layer. This 4cm deep comfort layer contours and cushions the body for a greater level of comfort. The open cell structure wicks away moisture and keeps you cooler for longer.
Support	Our mattress is the only true high density memory foam mattress available. Designed to mould itself to the contours of your body it provides instant comfort, more support and better sleep. This confidence is matched by our customers making repeat purchases for additional mattresses time and time again. Our class-leading zero disturbance technology has been a distinctive feature for over 10 years. Promoting deeper, more restful sleep it reduces the likelihood of being woken by a restless sleeping partner. Indeed our ten-year guarantee is underpinned with confidence of a decade of success. Unlike other brands we know our mattresses stand up to our warranty claims - as we have done it in real life for over a decade.	5 customisable comfort zones with 4 different densities of deep foam. We use highly resilient Polyurethane foam in super soft, soft, medium and firm densities so you can get comfort and support in all the right places. This foam bounces back quicker than standard memory foam so you can turn over without feeling stuck. Our 5 comfort zones can be changed at any time so you can get your best night's sleep. 1,000 individual pocket springs for superior support and bounce. 1,000 full size pocket springs make up the mattress core. They're individually wrapped and move independently as you sleep, so you won't be disturbed by your partner's tossing and turning during the night. Our springs measure 10cm high and have a gauge of 1.5mm. As the springs are encapsulated in highly resilient base foam you get edge-to-edge support.
Posts	In Bed with England's James Haskell‍ Introducing our latest brand ambassador England Rugby and Wasps RFC star James Haskell, who… [Read more]	–

Size & weight

	Ergoflex 5G	Tweak
Available sizes	Single, Double, King	Single, Double, King, Super King
Dimensions	Single depth: 23 cm	Single depth: 25 cm
Single weight (kg)	24	23
Double weight (kg)	37	34
King weight (kg)	40	40
Super King weight (kg)	–	47

FAQs

Ergoflex 5G

Is Ergoflex a firm mattress?

Yes, the Ergoflex mattress is known for its medium-firm feel, achieved through the use of dense foams. It is specifically designed to provide a supportive and comfortable sleeping surface. The dense foams used in the Ergoflex mattress contribute to its firmness level, offering solid support and aiding in proper spinal alignment. The medium-firm firmness of the Ergoflex mattress strikes a balance between comfort and support, making it suitable for individuals who prefer a slightly firmer feel while sleeping. It's important to keep in mind that firmness preferences can vary among individuals, so personal comfort levels may differ.

What is the weight limit for the Ergoflex mattress?

The weight limit for the Ergoflex mattress is recommended to be up to 18 stones in weight for an individual (approximately 114 kg or 252 lbs) or 30 stones for combined weight (approximately 190 kg or 420 lbs). This recommendation ensures the ongoing maximum performance of the mattress and its longevity of use. It is advised to adhere to these weight limits as a precaution to ensure optimal comfort and support while using the Ergoflex mattress.

How long does the Ergoflex mattress last?

The Ergoflex mattress is built to be durable and long-lasting, thanks to its high-quality materials. Ergoflex provides a 10-year guarantee, which has been tested and proven with real customers since 2006. Many customer reviews confirm the mattress's longevity, with users expressing satisfaction after using their Ergoflex mattresses for several years. It's important to remember that the lifespan of a mattress can vary depending on factors like usage, care, and personal preferences.

Tweak

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Wrap up

Thank you for checking out this Ergoflex 5G vs Tweak mattress comparison. We have tried to compare all the necessary information to help you choose which mattress is the most suitable for you.

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