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Features you'll love

Support System

Pocket Springs

Individually pocketed springs work to give you support exactly where you need it.

Comfort Fillings

British Wool

Soft, breathable, and temperature-regulating for comfort all year round.

Firmness

Medium Firm

Good for people who change sleeping position.

Description

At the most premium end of the Simba Natural Hybrid® range sits the Simba® Apex Mattress. With twelve meticulously crafted layers designed to offer you full-body support and comfort, plus an orthopaedic construction that sets you up for everyday, ache-free, this mattress is designed to elevate your sleep and improve your lifestyle.

12 layers of comfort and support for any type of sleeper

With up to 6,700 springs and a sumptuous 32cm depth, the Simba® Natural Hybrid® Apex Mattress is specially engineered to deliver the kind of restorative rest you can truly feel, night after night. And available in double, king, or super king sizes, this is one of the best mattresses for couples who never compromise on comfort.

Cashgora, silk, and wool layers add luxury, cushioning, and breathability

A top layer of luxurious Cashgora and silk provides soft, breathable cushioning, plus temperature regulation that prevents you from getting too warm. Wicking away excess moisture, these luxury natural fibres offer a drier, more comfortable sleeping environment that's as premium as it sounds. Beneath this is a layer of gentle Hampshire wool, plus five further layers of British wool. Offering exceptional airflow and moisture control, these wool keep you cool and fresh while hugging your body in intense comfort.

Adaptive pressure relief from durable British-made steel springs

For an impressively close level of support, two layers of Aercoil springs provide highly responsive pressure relief. Made from British steel, these small but strong springs adapt to your every move, targeting support exactly where you need it. Supported by the CoreMax base of full-size British-made steel pocket springs, which provide an even deeper level of support, these support systems create an orthopaedic level of comfort that helps to ease back and joint pain.

Wake up the best version of you with orthopaedic support

By helping to align your spine with your hips and shoulders, orthopaedic support encourages a healthier sleeping posture, in turn reducing tension throughout your body. The Simba® Natural Hybrid® Apex Mattress provides this essential level of support, helping you wake up truly refreshed and rejuvenated every morning.

Glue-free construction and plant-based cover for a healthier sleep

The CoreMax base is also crafted with a glue-free construction, which is better for you and the planet. This eco-conscious design goes hand in hand with the plant-based viscose cover that finishes the mattress, providing enhanced breathability and a silky soft feel. Naturally hypoallergenic, the Simba® Natural Hybrid® Apex Mattress is ideal for allergy sufferers or anyone looking for a healthier, more hygienic sleeping environment that provides incredible levels of support and comfort.

1278825-5063475203708

Features

Aerocoil® Spring Support Multi-Layers

Multiple layers of British steel-made Aercoil® springs provide targeted support to your entire body. These small but mighty springs ensure every inch of your body receives impressive pressure relief for a night of rejuvenating rest.

Sustainably Sourced Hampshire Wool

Cosy and cushioning, Hampshire wool is known for its durability and elasticity, making it the perfect material for adding extra comfort to your mattress. Plus, you can sleep even easier knowing it's sustainably sourced.

Cashgora & Silk Cushioning Layer

Cashgora (a fibre from a crossbreed of mohair-producing Angora goats and cashmere goats) adds softness and durability, while silk provides a lightweight, fresh feel that wicks away moisture and regulates your temperature.

32cm Depth

This mattress is approximately 32cm deep.

Plant-Based Viscose Sleep Surface

Silky smooth and highly breathable, this premium sleep surface is made from plant-derived viscose for a fresher, more sustainable night's sleep.

Orthopaedic Support

Designed to offer a firmer sleep surface, providing targeted support for your back and joints.

Reinforced Edges

The mattress has reinforced edges, so that the full sleep surface can be used. This means more sleeping space - which is usually lost in conventional, less edge-stable mattresses.

No Need To Turn

A single-sided mattress which does not need to be turned/flipped. One-sided mattresses should, however, be rotated head to toe regularly.

No Roll Together

Individual personal sleeping zones mean that you won't be disturbed if your partner rolls or moves, as you won't feel their motion. There's also no tendency to roll towards the middle of the mattress.

Turning Handles

Flag-stitched handles are attached to the sides of the mattress to assist in turning or rotating.

Hypoallergenic

Being hypoallergenic, this is the perfect item for allergy sufferers - or anyone looking for a healthy night's sleep.

CoreMax™ Sprung Base

British steel pocket springs with a glue-free construction form a base of deep, stable support. Arranged in seven zones to match the needs of the different parts of your body, these springs help to keep you in the healthiest sleeping posture.

Invisible Tufting

Invisible tufts keep the mattress surface smooth and comfortable whilst harnessing the durability benefits of traditional tufting.

Flat Mattress

This mattress will arrive flat, not rolled and boxed.

Fire Resistant - Low Hazard

This product conforms to the BS7177: 2008 standard for domestic use (low hazard) - ideal for use at home.

Benefits

Prevents back and joint pains thank to impressive orthopaedic support
Promotes a healthier sleeping posture by encouraging proper spinal alignment
Gentle natural fibres ease tension for full-body pressure relief
Wicks away excess moisture and regulates body temperature for deeper sleep
Minimises partner disturbance, letting light sleepers enjoy a proper rest
Luxury natural materials and British-made springs create a premium feel

Awards

Zerowasted.co.uk - Best Buy

Helping shoppers make eco-conscious purchases, Zero Wasted hand-selects and compares the products that make it easier to switch to a more ethical, environmentally friendly lifestyle. Their Best Buy awards highlight the products and brands that prioritise sustainability.

Good Housekeeping Institute 2026

Good Housekeeping's Lab extensively researches the best brands, features, and materials on offer to recommend only the most premium sleep products. Voted for by product testing experts as well as a diverse panel of customers, a Good Housekeeping Institute Approved badge is a sign of this product's superior craftsmanship and overall quality as a sleep product.

Dimensions

Product dimensions and load limits
Size	A	B	C	D	E	Max. Load	Max. Mattress Height	No. of Boxes	Net Weight
Double	32cm	190cm	135cm	N/A	N/A	N/A	N/A	N/A	50kg
King Size	32cm	200cm	150cm	N/A	N/A	N/A	N/A	N/A	55kg
Super King	32cm	200cm	180cm	N/A	N/A	N/A	N/A	N/A	58kg

Sizes may vary slightly from their stated dimensions due to manufacturing tolerances, please allow +/- 20mm (1in)
Not sure if this will fit? Read our Home Measuring Guide for step-by-step advice.

Up to 30% off

Lowest Price Promise!

Shop with confidence. We monitor our competitors' price every 24 hours to ensure you're always getting the best deal. As the 2025–2026 'Online Bed Retailer of the Year', we pair unbeatable value with award-winning next-day delivery.

Simba® Natural Hybrid® Apex Mattress

5.0 out of 5

5 Star (1)

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3 Star (0)

2 Star (0)

1 Star (0)

Experience restful nights and wake up pain-free with supportive, orthopaedic comfort.

Aerocoil® Spring Support Multi-Layers

Sustainably Sourced Hampshire Wool

Cashgora & Silk Cushioning Layer

32cm Depth

Firmness: Medium Firm

£1539

RRP £2199

Save £660

from £1539

Size

Double 4'6" x 6'3"

£1539

Only 3 left

King Size 5' x 6'6"

£1679

Only 3 left

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Description & Features

12 layers of comfort and support for any type of sleeper

Cashgora, silk, and wool layers add luxury, cushioning, and breathability

Adaptive pressure relief from durable British-made steel springs

Wake up the best version of you with orthopaedic support

Glue-free construction and plant-based cover for a healthier sleep

Aerocoil® Spring Support Multi-Layers

Sustainably Sourced Hampshire Wool

Cashgora & Silk Cushioning Layer

32cm Depth

This mattress is approximately 32cm deep.

Plant-Based Viscose Sleep Surface

Silky smooth and highly breathable, this premium sleep surface is made from plant-derived viscose for a fresher, more sustainable night's sleep.

Orthopaedic Support

Designed to offer a firmer sleep surface, providing targeted support for your back and joints.

Reinforced Edges

The mattress has reinforced edges, so that the full sleep surface can be used. This means more sleeping space - which is usually lost in conventional, less edge-stable mattresses.

No Need To Turn

A single-sided mattress which does not need to be turned/flipped. One-sided mattresses should, however, be rotated head to toe regularly.

No Roll Together

Turning Handles

Flag-stitched handles are attached to the sides of the mattress to assist in turning or rotating.

Hypoallergenic

Being hypoallergenic, this is the perfect item for allergy sufferers - or anyone looking for a healthy night's sleep.

CoreMax™ Sprung Base

Invisible Tufting

Invisible tufts keep the mattress surface smooth and comfortable whilst harnessing the durability benefits of traditional tufting.

Flat Mattress

This mattress will arrive flat, not rolled and boxed.

Fire Resistant - Low Hazard

This product conforms to the BS7177: 2008 standard for domestic use (low hazard) - ideal for use at home.

Prevents back and joint pains thank to impressive orthopaedic support
Promotes a healthier sleeping posture by encouraging proper spinal alignment
Gentle natural fibres ease tension for full-body pressure relief
Wicks away excess moisture and regulates body temperature for deeper sleep
Minimises partner disturbance, letting light sleepers enjoy a proper rest
Luxury natural materials and British-made springs create a premium feel

1278825-5063475203708

Dimensions

Awards & Accolades

Zerowasted.co.uk - Best Buy

Good Housekeeping Institute 2026

Simba® 10 Year Guarantee

Simba® 10 Year Guarantee

Simba are certain you’ll love your new mattress, but for complete peace of mind they offer a 10 year guarantee. In the very unlikely case that you discover a defect as a result of faulty workmanship or materials, they’ll swap it for a new one. Please see: https://simbasleep.com/pages/ten-year-guarantee for further info.

100 Night Sleep Trial

Finding the perfect mattress shouldn't be stressful. That's why we offer a generous 100 night sleep trial. Snuggle in and test it out for at least 50 nights. If it's not your perfect match we’ll offer you an exchange for a mattress that you love even more.

Delivery & Returns

Delivering a better night’s sleep

We are proud to provide our award-winning Free Next Day Delivery service to almost everywhere across mainland UK, sending a proper night’s sleep out far and wide.

Hassle-free and convenient, you can choose a date and time that suits you if you prefer, and get us to deliver straight to your room of choice!

For some addresses, a small fee will be charged to help us get you your best night’s rest as quickly as possible. To see if this applies to you, or if we’d be unable to deliver to you, just check our Postcode Checker.

Returns made simple

Sleep is personal, so we understand that sometimes you may want to return an item you’ve purchased from us for an exchange or refund.

To make things go as smoothly as possible if you do decide to return, make sure that you check your item(s) when they arrive before signing for delivery.

In the unlikely event of a problem, just give our friendly, award-winning Customer Service team a call, but do note that if you want to return your item to us, you will be responsible for arranging it and for the cost. For more information, head to our Returns page.

Recycling & Sustainability

Old Mattress Removal

For just £39, our fast and friendly team will collect your old mattress at the exact same time we deliver your new one. No waiting, no heavy lifting, and no clutter. 100% of your old mattress is carefully recycled and kept out of landfill. Simply select 'Old Mattress Removal' at checkout.

Our Sustainability Efforts

We’re proud to be partnered with Ecologi, the UK’s leading climate platform, to help us plant trees and fund environmental projects across the globe, protecting the world’s rainforests and helping those in need.

Our #SustainableSnooze campaign also highlights our journey to becoming a Net Zero company, keeping as many old mattresses out of landfill, and making positive steps in our internal processes to become as green as possible.

Read more about why this is important to us and the milestones we’ve achieved on our Sustainability page.

Rated Excellent

5.0/5

based on 1 reviews

Quality of product

5 / 5

Comfort Rating

5 / 5

Value for Money

5 / 5

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Well made and does what it says on the tin

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