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Ergoflex 5G vs Nectar Premier vs Simba Simbatex Foam

Easily compare the Simba Simbatex Foam vs Nectar Premier vs Ergoflex 5G Mattresses side-by-side.

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Essential Mattress Info

Ergoflex (UK)Nectar (UK)Simba (UK)
Mattress Type
Memory foamMemory foamAll Foam

Trial & Warranty

Trial Period
Trial Period (nights)
Warranty Length (years)

Firmness Options

One Firmness Fits All?
Adjustable Firmness
Half-Half Firmness
Selectable Firmness
Flippable / Reversible Firmness
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.

The Nectar Premier is a medium-firm mattress. Nectar is designed for every type of sleeper and arrives backed by their Full Comfort Guarantee and Forever Warranty, plus a full year sleep trial so you can make sure Nectar is right for you - in the comfort of your own bedroom.

The Simbatex® Foam is a medium-firm mattress, however, if you decide your Simba Mattress is not for you, simply contact Simba and they'll arrange collection and refund the cost of your mattress.

Mattress Construction

Materials Overview

Ergoflex, established in 2006, is the only mattress-in-a-box brand that has been around longer than the warranty. The Ergoflex 5G mattress is a true, high-density orthopaedic pressure-reducing mattress that comprises of 3 premium foam layers:

  • Tencel® Outer Cover
  • Protective Inner Cover
  • 9cm Visco-Elastic Memory Foam
  • 5cm Cool-Sleep Airflow Layer
  • 9cm High-Resilience Foam Base.

The Nectar Premier has six layers and with 33% extra memory foam (than the Nectar Memory Foam) it will provide you with optimal comfort and support. The layers are:

  • Quilted Cooling Cover
  • Dynamic Support layer
  • Pressure Relieving Memory Foam
  • Honeycomb Micro-Zoned Transition Layer
  • Honeycomb Micro-Zoned Support Base
  • Positioning Base Material.

The Simbatex® Foam mattress by Simba is luxuriously deep (at 25cm) and has four layers of cooling, supportive sleep tech:

  • Anti-allergenic removable knitted cover
  • Open cell graphite infused Simbatex foam
  • Simba-Response foam
  • 7 zoned high density foam base.

Comfort Info

Sleeping on the Ergoflex 5G gives a feeling of pure weightlessness, allowing you to find that comfortable sleep position quicker.

Zero partner disturbance technology reduces the likelihood of being woken by a restless sleeping partner, which allows you to experience deeper, more restorative sleep.

Unparalleled comfort is combined with excellent support, and precision engineering allows the mattress to adjust to all body shapes.

Simbatex® foam has 30x more airflow than dense, standard memory foam. It is also infused with natural graphite, which has an excellent ability to draw away excess heat.

Support Info

The Ergoflex 5G mattress is the only true high density memory foam mattress available, the ILD (indentation load deflection) is comparable only to TEMPUR®, and it is technically more advanced and superior in performance to every alternative both in this price range and beyond.

Designed to mould itself to the contours of your body it provides instant comfort, more support and better sleep. This confidence is matched by customers making repeat purchases for additional mattresses time and time again.

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.

With 12 zones of support, you'll wake up feeling refreshed and recharged as the mattress adjusts to all body shapes.

Simbatex® foam has an open cell structure which offers superior support and elasticity.

Comfort Specs

Visco-Elastic Memory Foam
This high density open-cell memory foam disperses heat more efficiently than previous generation memory foam.

Cool-Sleep Airflow Layer
The upside-down egg carton-like design, built with temperature-regulation in mind, is a unique airflow system that encourages air to freely circulate thorough the mattress keeping you cool while you sleep.

Dynamic Support layer
Is an innovative foam layer that gives just the right amount of bounce and enhances airflow, regulating your body temperature, keeping you at a comfortable temperature all night long.

Cooling, Cushioning Simbatex® Foam
A soft CertiPUR® foam, providing superior elasticity and 30x more airflow than memory foam. Infused with heat absorbing graphite for extra heat control.

Simba-Response Foam
A firmer, open cell foam maintains airflow thanks to a less dense structure.

Support Specs

Visco-Elastic Memory Foam
A generous top layer of 9cm of true high-density visco-elastic memory foam provides supportive body-shaping performance. With billions of spherical shaped open cells, that intelligently respond under your weight to create the optimum level of body-cradling support to alleviate pressure points (such as the lower back, hips, shoulders).

High-Resilience Foam Base
Nine centimetres deep, this high resilience impact-resistant foundation layer ensures perfectly weighted support for the upper layers. It provides class-leading performance and longevity.

Pressure Relieving Memory Foam
Provides support and comfort where you need it most.

Honeycomb Micro-Zoned Transition layer and Honeycomb Micro-Zoned Support Base
These precision engineered layers work in harmony to make micro-adjustments and optimise spinal alignment.

Positioning Base Material
Keeps your mattress in the correct place, so it doesn't move around on your bed frame.

Supportive Simba-Response Foam
A firmer foam that offers excellent support.

Zoned, high density foam base
A notch-cut, high-density foam base provides zoned pressure relief to your body, with specific zones for the shoulders and hips and other potential problem areas.

Fabric Specs

Tencel® Outer Cover
This outer cover provides a luxurious, natural and breathable surface which can be removed and machine washed whenever you wish (machine wash at 30°C). Tencel® is naturally anti-bacterial, moisture-wicking, and sustainable. The breathability outperforms natural cotton and even the most hi-tech synthetics. It is also supremely strong and durable, yet luxuriously silky and soft to the touch. Vented 3D mesh panels at each end aid in preventing heat retention.

Protective Inner Cover
This micro-fine inner cover protects all the foam layers.

A polyester-blend cover that uses novel heat-wicking and cooling technology, this super soft cover helps to regulate your temperature when you sleep.

With added handles on the Premier, it’s easy to move manoeuvre into just the right position.

A zipped, breathable cover, free from harmful substances (Oeko-tex 100 Standard) and suitable for allergy sufferers. This 500g hypoallergenic knitted top cover is removable and washable (washing instructions are included with the mattress) or combine with Simba's mattress protector for added protection.

Manufactured in
United KingdomUnited Kingdom


Side Sleepers
Back Sleepers

Size & Weight

UK Single
UK Single Dimensions
190 x 90 x 23 cm190 x 90 x 28 cm190 x 90 x 25 cm
UK Single Weight (kg)
UK Double
UK Double Dimensions
190 x 135 x 23 cm190 x 135 x 28 cm190 x 135 x 25 cm
UK Double Weight (kg)
UK King
UK King Dimensions
200 x 150 x 23 cm200 x 150 x 28 cm200 x 150 x 25 cm
UK King Weight (kg)
UK Super King
UK Super King Dimensions
200 x 180 x 23 cm200 x 180 x 28 cm200 x 180 x 25 cm
UK Super King Weight (kg)


Delivery Cost
Delivery Info

Free next-day delivery for most customers (if ordered Monday to Thursday before 10am). Your mattress comes vacuum-packed, rolled and delivered right to your door in a convenient box. It comes with a 30-night no-obligation trial period and free returns if you decide it's not for you.

Free delivery typically within 5 working days. Nectar have calculated the carbon footprint from the entire manufacturing process, found ways to reduce this, and then offset the rest. So your mattress arrives at your door completely carbon neutral. All cardboard packaging is sourced from sustainable forests. For a small fee, Nectar will even remove and recycle your old mattress.

Free, carbon neutral delivery typically within 3 business days to your chosen room or via zero contact; Simba also offer mattress removal in most parts of the UK.

Latest Promotions
Save 45% Today ! Use code : SAVE45 Ends soon.
See offer
End of Winter Sale ! 20% OFF selected mattresses + Free Delivery & Returns. Use code NECTAR. Offer ends February 29th.
See offer
December Sale. 40% OFF selected Hybrid mattresses. Ends 18th December
See offer