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From £2,199
Or as low as £45.98 monthly
Based on single mattress
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The peak of luxury

The Simba Earth Apex Mattress has a rating of ["4", "4"], based on 8 reviews.

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Our products benefit from ongoing innovation. Reviews attributed to a product model reflect views customers have shared for prior design iterations of the same model, as well as the improved iteration offered today.

& 1 Award

Simba Apex Mattress

The sublime summit of our Earth mattress range. A breathtaking fusion of nature and new technology. For transformative comfort.

5,750 Springs 30cm Depth 8 Layers Quadcore™
Silk, Cashmere,
Mohair layer


Medium soft

Medium firm


Apex Mattress Highlights

  • Luxurious nature & tech. The stunning combination of Nature’s best materials & our latest innovative tech.
  • Plush cushioning.Soft cashmere, wool, silk and mohair to support ultimate comfort and assist heat dissipation.
  • Lasting comfort. Yorkshire grown hemp & flax encourage lasting comfort and resilience through the lifespan of the mattress.
  • Top-of-range pressure relief. The highest spring count of the Earth range, designed to provide our most tailored support.
  • Quadcore™ base. Ground-breaking ‘four-point’ spring system aims to enhance individual spring support and minimise motion transfer.
  • Premium, breathable cover. A smooth blend of wool and plant-derived viscose provides a silky sleep surface.
  • Made in the UK. In Yorkshire, where most of the natural components of this mattress are grown.
  • Simba recycling available. Suitable for recycling via our collection service or specialist providers.

Apex Mattress: Tech Spotlight


Heaven. On Earth.

From lush cashmere to soft mohair, we’ve embraced some of the finest natural components in the Apex. And we’ve fused them with ingenious, innovative tech. The result? Celestial.

Exceptional natural materials  

Luxury. By Nature. 

The Apex mattress is, quite simply, paradise. With the sort of pillowy, cloud-like cushioning that helps you relax the minute you lie on it.    

Our engineers wanted to create a sensation of being very, very gently hugged. At the perfect temperature. They found the answer in nature’s most sumptuous creations. First, luxurious wool for moisture management and soft cashmere (upcycled from a British designer fashion house), renowned for their thermoregulating powers. Then mohair; known for centuries as the ‘diamond fibre’, famed for its velvety sheen and strength. Next up organic silk, irresistibly smooth but also reputedly one of the strongest natural fabrics on the planet. The result was wondrous. We experienced sublime cushioning and temperature control. 

But we’ve also designed the Apex to feel as blissful throughout its life as it does on Day 1. Step forward Yorkshire grown hemp and flax, famous through the centuries for their resilience, durability and breathability.


QuadCore™ spring base

Few people know more about springs than our mattress experts. So when they told us they’d created a new, even better design, we were all ears.

Usually mattress springs are connected to each other in rows or large groups. So any movement one spring makes is passed on to the next, and the next after that. Across the entire mattress. But our clever QuadCore™ springs are grouped just four at a time, disrupting any ripple effect and limiting motion transfer to encourage more tailored, accurate support.

But that’s not all. Fixing springs with glue can damage them and inhibit movement, so the team were excited to discover another way of connecting them: sonic welding. It sounds cool, and it is – this way the springs themselves remain untouched, undamaged and free to move individually.


Designed for superb support. 



motion transfer

The Aerocoil® spring was our first baby, but for our sublime Apex mattress, we decided we needed to extend the family. Because the way we see it, more springs means more support and more breathability. For a better night’s sleep.

2,500 titanium alloy, Aerocoil® micro springs nestle in the upper layers. They’re pocketed and cone-shaped; you can’t feel them, but they compress gently in response to your body shape. encouraging responsive support and limiting transfer of movement.

2,500 high carbon steel micro springs sit further down the mattress. They’re barrel-shaped and pocketed, helping to provide extra support for your heavier bits like hips and shoulders, and allowing fresh air to flow through the mattress.

750 high carbon steel QuadCore™ springs make up the sturdy foundation of the mattress. They’re pocketed and grouped in fours to encourage extra-tailored responsiveness, and sonically welded (rather than glued) together, to limit unwanted spring movement.


Hand tufted with care  

Our Earth mattresses start life on a Yorkshire farm, not a factory. Because that’s where many of the crops and materials we use are grown, harvested, and processed.

The factory where our experienced craftsmen and women work their magic is in Yorkshire too. And although we might use high-tech machines to give us the precise measurements and weights for every layer, it’s these highly skilled teams that stitch and tuft the layers, feeling the mattress, checking the stitching. The way it’s been done for centuries.

An exceptional craft, for an exceptional mattress.


What’s special about our Earth mattresses?

Why Simba suits everyone

All shapes, sizes & sleep positions

Simba is the most five-star rated mattress brand in the world*. Because our unique Hybrid® mattress technology is designed to feel perfectly comfortable to everyone, no matter their shape or sleeping style.

It’s about offering improved pressure relief and full body alignment; Simba’s signature tech is designed to create a ‘hugged’, cradled feeling in the upper layers and more support in the base layers, with adjustment for hips and shoulders.

P.S. We rate our Hybrid® Earth mattresses as ‘medium-firm’. There’s no universal firmness rating system in the industry, so we’ve aimed to align our designs with independent studies which show this is ideal for sleep quality and comfort.

*Please visit: for more information.

too soft

Lacks support


For full body alignment


Lacks cushioning

The Apex Mattress: Layer by Layer

Working together for optimum comfort  

Award winning tech

See all awards
Earth Mattresses: Zero Wasted
B Corp Certified logo


A force for good. 

Which mattress range is right for you?

Budget Friendly Mattress Essential Hybrid: Sleep Hero Recommended


4 Layers
Up to 1000 Springs
20cm Depth
5 Support zones

Extra Tech


4 Layers
Up to 1500 Springs
23cm Depth
7 Support zones

1/2 Million Sold Mattress Original Hybrid: Good Housekeeping Institute 2024


5 Layers 
Up to 2500 Springs
25cm Depth
9 Support zones

Bestselling Mattress Pro Hybrid: T3 Awards 2022 Inc. Protector worth up to £169


8 Layers
Up to 5000 Springs
28cm Depth
Wool top layer
+ Free protector

Luxury Comfort & Support Mattress Luxe Hybrid: Good Housekeeping Institute 2024 Inc. Protector worth up to £169


11 Layers
Up to 6000 Springs
31cm Depth
Bamboo & Wool top layer
+ Free protector

The best of everything Mattress Ultra Hybrid: The Telegraph 2023 Inc. Protector worth up to £169


13 Layers
Up to 8500 Springs
34cm Depth
Kapok, Bamboo & Wool top layer
+ Free protector

Oasis of comfort Earth Mattresses: Zero Wasted


6 layers
Up to 3,250 Springs
25cm Depth
Hemp and Flax layer

Sleep sanctuary Earth Mattresses: Zero Wasted


7 layers
Up to 4,250 Springs
28cm Depth
Wool and Hemp layer

Currently viewing

The peak of luxury Earth Mattresses: Zero Wasted


8 layers
Up to 5,750 Springs
30cm Depth
Silk, Cashmere and Mohair layer

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