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The Natural Hybrid® Apex is Simba's most premium foam-free hybrid mattress, handcrafted in Great Britain. At 32cm deep with up to 5,700 Aerocoil® titanium micro springs across three layers plus a 1,000-spring CoreMax™ zoned base, it carries the highest spring count in the Natural Hybrid® range. A top layer of Cashgora wool and silk sits above Hampshire wool and multiple British wool layers throughout, with no foam anywhere in the construction. The Apex delivers deep cushioning, complete spinal alignment and the finest temperature regulation in the range.
A premium foam-free hybrid mattress best suited to sleepers who want medium firm support at the highest level of natural luxury, with triple-layer Aerocoil® spring technology and a construction built from Cashgora wool, silk and traceable British wool, handcrafted in the UK.
Medium Firm Feel - 4/6: A supportive feel with added stability. Ideal for people who change sleeping position during the night and need a balance of comfort and support.
Best for
Not ideal for
Blended British Wool, Cashgora and Silk Layer
What it is: A premium blend of soft Cashgora goat wool, British wool, and luxurious silk fibres.
How it helps you sleep: Combines the extraordinary softness of Cashgora, the hygroscopic properties of British wool, and the temperature-regulating qualities of silk for a supremely comfortable and indulgent sleeping experience.
British Wool Layers
What it is: Multiple layers of 100% British wool sourced through the Traceable British Wool Scheme in partnership with British Wool.
How it helps you sleep: Provides cushioning, resilience and natural temperature regulation throughout the depth of the mattress. The multiple layers give the Apex its characteristic depth and ensure the natural fillings remain evenly distributed and comfortable over the long term.
Aerocoil® Titanium Alloy Pocket Springs (Three Layers)
What it is: Up to 5,700 conical, individually pocketed titanium alloy micro springs across three layers, manufactured in Leeds.
How it helps you sleep: As the springs compress, they push fresh, cooling air through the mattress, helping regulate temperature while providing exceptional support, pressure relief and undisturbed sleep. Three layers deliver the highest level of pinpoint support and motion isolation in the Natural Hybrid® range.
CoreMax™ 7-Zone Barrel Spring Base
What it is: Up to 1,000 high carbon steel barrel springs manufactured in Hampshire, arranged in seven support zones with a reinforced steel frame border.
How it helps you sleep: The zoned base provides deep structural support beneath the natural fillings and Aerocoil® layers, with each zone calibrated to the different support needs of the body, extending firm support to the very edges.
Plant-Derived Viscose Cover
What it is: A non-removable cover made from viscose, a plant-derived material known for its softness and breathability, with a bio-based fire retardant treatment on the top surface and sides.
How it helps you sleep: Regulates temperature and breathes well, providing a smooth, silky sleep surface that supports the open construction of the Apex, helping cool air move freely through the mattress from the spring system upward.
| FEATURE | DETAIL |
|---|---|
| Brand | Simba |
| Category | Natural Hybrid® Mattress |
| Model | Natural Hybrid® Apex |
| Firmness | Medium Firm (4/6) |
| Mattress Type | Hybrid with pocket springs and premium natural wool fillings |
| Foam Free | Yes |
| Spring System | Aerocoil® Titanium Alloy Pocket Springs |
| Spring Count | 6,700 |
| Comfort Layers | Cashgora Wool, Silk, Hampshire Wool, British Wool |
| Cover Material | Plant-derived viscose |
| Mattress Finish | Hand Tufted |
| Mattress Depth | 32cm |
| Edge Support | Yes - CoreMax™ reinforced steel frame border |
| Motion Isolation | Yes |
| Temperature Regulation | Yes - Cashgora wool, silk, multiple British wool layers and foam-free open spring construction |
| Hypoallergenic | Yes |
| Care Instructions | No need to flip. Rotate head to toe every 1-2 months for the first 6 months, then twice yearly. Do not vacuum. Remove dust with a soft brush. Spot clean with a damp cloth and mild soap solution only, do not bleach. Air regularly. Use a mattress protector. |
| Handles | Yes - Flag-stitched |
| Compatible Bed Bases | Slatted (slats no more than 7cm apart) and divan bases |
| Single or Double Sided | Single sided - do not flip |
| Country of Manufacture | Great Britain |
| Maximum Weight Per Side | 114kg (18st) per side |
| Guarantee | 10 years |
| Mattress Trial | 200 nights |
| Ideal For | Back sleepers, front sleepers, combination sleepers, couples, hot sleepers, allergy sufferers |
| Certifications | Global Organic Textile Standard (GOTS)Forest Stewardship Council (FSC®)B Corporation (B Corp)Good Housekeeping Institute Approved (GHI)Traceable British Wool Scheme |
| Fire resistance | BS7177:2008 compliant. Bio-based natural fire retardant treatment applied to cover. |
| Sustainability | Foam-freeFully recyclableTraceable British Wool Scheme certified woolResponsibly sourced Cashgora and silkGlobal Recycled Standard (GRS) certified fire-retardant base layerB Corp Certified brand |
| Packaging Type | Flat-packed |
| SIZE | WIDTH x LENGTH x DEPTH | WEIGHT |
|---|---|---|
| Single | 90cm (3ft) x 190cm (6ft3) x 32cm (12.5'') | 33kg (73lbs) |
| Double | 135cm (4ft6) x 190cm (6ft3) x 32cm (12.5'') | 50kg (110lbs) |
| King Size | 150cm (5ft) x 200cm (6ft6) x 32cm (12.5'') | 55kg (121lbs) |
| Super King Size | 180cm (6ft) x 200cm (6ft6) x 32cm (12.5'') | 66kg (145lbs) |
Vs softer mattresses: The Apex is firmly positioned at medium firm despite its luxurious feel. The depth of natural fillings creates a sumptuous sleeping surface, but the triple spring system ensures support is never compromised. Sleepers who want a genuinely soft feel should look at softer mattress ranges.
Vs firmer mattresses: The Apex's three Aerocoil® spring layers and Cashgora wool and silk top layer provide considerably more cushioning and pressure relief at the shoulder and hip than a firm mattress, while the CoreMax™ base keeps the underlying support firm and consistent.
Vs premium and luxury mattresses: The Apex sits alongside the most premium natural hybrid mattresses on the market. At 32cm deep with twelve carefully constructed layers, it compares favourably with significantly more expensive handmade alternatives. What sets it apart is the combination of proprietary Aerocoil® spring technology with premium Cashgora wool and silk, a combination very few competitors can replicate.
The Natural Hybrid® Apex is backed by Simba's 10-year manufacturer's guarantee against defects in materials and workmanship. Given the quality of the Cashgora wool, silk and multiple British wool layers, and the precision-engineered three-layer spring system, this is a mattress built to last far beyond the guarantee period.
The Natural Hybrid® Apex has received 8 awards and accreditations, including:
Good Housekeeping Institute Approved: Independently tested and approved by the Good Housekeeping Institute, recognising the Apex's quality construction and sleep performance.
Indy/Best: Named in The Independent's Best list, confirming its position among the top-rated mattresses in the UK.
Sun Shopping Recommended: Recognised and recommended by The Sun's shopping editorial team.
Best UK Mattress: Recognised as one of the best mattresses in the UK by an independent panel of sleep experts.
Expert Reviews Best Premium Mattress: Awarded Best Premium Mattress by Expert Reviews following comprehensive hands-on testing and analysis.
Get the most out of your new Natural Hybrid® Apex by pairing it with the Simba Hybrid® Mattress Protector. Designed to guard against spills, stains, dust mites and everyday wear, this breathable and hypoallergenic protector helps keep your mattress fresh, clean and performing at its best for longer.
Soft, quiet and temperature-regulating, it adds an extra layer of comfort without changing the feel of your mattress, the perfect finishing touch to your sleep setup.
The Natural Hybrid® Apex is Simba's finest achievement in natural sleep engineering: a 32cm deep foam-free mattress with three layers of Aerocoil® springs, Cashgora wool and silk at the top, and multiple layers of traceable British wool throughout, all handcrafted in the UK, fully recyclable and backed by a 10-year guarantee and 200-night trial. If you want the very best natural sleep experience Simba makes, with no compromise on comfort, support or sustainability, this is it.
Choosing a mattress online takes trust. That's why the Natural Hybrid® Apex comes with a 200 night comfort guarantee, if it doesn't feel right, we'll exchange it. View the full mattress trial policy.
Not sure which Simba mattress is right for you? See our Mattress Buying Guide for expert guidance on mattress types, fillings and comfort levels.
| ITEM | INCLUDED? |
|---|---|
| Mattress | Yes |
| Base | No |
| Headboard | No |
Compared to other mattress brands worldwide, Simba Sleep has won the most five-star reviews, a testament of their success.
They proudly hold the distinction of being the first sleep brand in the UK to receive B Corp certification. B Corp certification recognises companies that actively promote social and environmental change through their business operations. They also helped make a plan for the British Retail Consortium to tackle climate change.
Selling quality mattresses, beds, pillows, duvets, and bedding, they aim to help people sleep better all over the world.
Is this mattress suitable for a slatted base?
Yes, this mattress is suitable for a slatted base as long as your slats are in good condition and no further apart than 7.5cm.
What is the depth of this mattress?
This mattress is 32cm deep.
Do I need to turn this mattress?
This is an easy-care mattress, which means you do not need to turn the mattress over, however, you should rotate from head to toe on a regular basis to ensure even use.
How long will this mattress last?
This mattress has a 10 year guarantee.
Does this mattress have an odour?
As with all mattresses, there may be a slight smell when first opened. We liken this to a new car smell, which is non-harmful and will disappear within a few hours.
Made to measure mattresses and divan bases are available – please call 01928 242829.
For full Terms and Conditions please click here.
Our experienced delivery team can take away your old bed or mattress when delivering your new one. Please ensure you have dismantled your old bed prior to delivery.
Simply add this service to your order at checkout.
What products will you remove?
We will remove mattresses, divan beds and bed frames (subject to all beds being dismantled first). Add this convenient service to your order at checkout.
Do I need to dismantle my old bed before collection?
Yes, your old bed must be fully dismantled.
Can I add Removal and Recycle on after placing my order?
You can either add it to your order on the basket page and pay at checkout, or if you would like to add it after you have checked out, simply contact us on 01928 242829 before your order is due for delivery.
Do you recycle the beds and mattresses you collect?
When we remove your old bed or mattress, we ensure that it is disposed of in an environmentally responsible way. All products are sent to The Furniture Recycling Company, the UK's largest and most trusted furniture recyclers.
Our skilled drivers deliver throughout the UK and will deliver straight to your home. Free doorstep delivery is available on many products and you can also choose delivery to room of choice for an additional fee.
How much is delivery?
We offer free delivery to most of the mainland UK for orders over £100; there are applicable charges for deliveries to the highlands or far out UK, which can be found by putting your postcode into the delivery section on the product page. For orders under £100, there is a £10 charge.
How long does delivery take?
Once you select the required product, an approximate delivery time will be quoted on the product page before adding the item to your basket. During checkout, you will either be given the option to select your date, or we will state an estimated time for delivery. Once you have placed your order, we will contact you to book a date within the timeframe quoted.
Will I be contacted beforehand to arrange a delivery slot?
Once you have placed an order, our delivery team will contact you directly to arrange a suitable delivery slot, either via email, call, or text message.
Can I choose my delivery day?
If the product is available for next-day delivery, you can select a date at checkout. For all other products, you will be presented with an estimated timeframe for delivery. After placing your order, our delivery team will contact you via e-mail, text or call to arrange a suitable delivery day/time.
Read all our Delivery FAQs
We have an easy returns policy: If you change your mind, we're happy to accept returns within 14 days of you receiving your product, as long as they are unused and unassembled. However, for hygiene reasons, we can't take back products that have been slept on, unless there's a fault.
Custom-made products can only be returned if they are faulty.
Please take a look at our Terms & Conditions.
Can I return a mattress I've slept on?
Normally, mattresses can only be returned if they're unused within 14 days. But if your mattress has a trial period, please refer to the mattress trial information page for further details.
How long do I have to return an item I've purchased online?
You have 14 days to return an item if bought online, subject to the item not being used or assembled. Please note, if you wish to inspect a mattress, please ensure the protective outer plastic packaging is not removed, as this may affect your right to return due to health and hygiene reasons. Any product that is made to order/customised cannot be returned unless faulty.
Do I have to pay for the return?
To return your product, you can either arrange the return yourself, or we can happily arrange it on your behalf for a charge, which will be deducted from your refund. The collection charge covers the expenses involved in picking up the item from your location and safely bringing it back to our warehouse. For bedding items, the amount is £20, and for large/bulky items, charges start from £95 (depending on the product/postcode).
Can I return a part or fully assembled item?
Unfortunately, once an item is assembled, whether partially or fully, we can't accept returns unless the item is faulty.
Read all our Returns FAQs
Our skilled drivers deliver throughout the UK and will deliver straight to your home. Free doorstep delivery is available on many products and you can also choose delivery to room of choice for an additional fee.
How much is delivery?
We offer free delivery to most of the mainland UK for orders over £100; there are applicable charges for deliveries to the highlands or far out UK, which can be found by putting your postcode into the delivery section on the product page. For orders under £100, there is a £10 charge.
How long does delivery take?
Once you select the required product, an approximate delivery time will be quoted on the product page before adding the item to your basket. During checkout, you will either be given the option to select your date, or we will state an estimated time for delivery. Once you have placed your order, we will contact you to book a date within the timeframe quoted.
Will I be contacted beforehand to arrange a delivery slot?
Once you have placed an order, our delivery team will contact you directly to arrange a suitable delivery slot, either via email, call, or text message.
Can I choose my delivery day?
If the product is available for next-day delivery, you can select a date at checkout. For all other products, you will be presented with an estimated timeframe for delivery. After placing your order, our delivery team will contact you via e-mail, text or call to arrange a suitable delivery day/time.
Read all our Delivery FAQs
We have an easy returns policy: If you change your mind, we're happy to accept returns within 14 days of you receiving your product, as long as they are unused and unassembled. However, for hygiene reasons, we can't take back products that have been slept on, unless there's a fault.
Custom-made products can only be returned if they are faulty.
Please take a look at our Terms & Conditions.
Can I return a mattress I've slept on?
Normally, mattresses can only be returned if they're unused within 14 days. But if your mattress has a trial period, please refer to the mattress trial information page for further details.
How long do I have to return an item I've purchased online?
You have 14 days to return an item if bought online, subject to the item not being used or assembled. Please note, if you wish to inspect a mattress, please ensure the protective outer plastic packaging is not removed, as this may affect your right to return due to health and hygiene reasons. Any product that is made to order/customised cannot be returned unless faulty.
Do I have to pay for the return?
To return your product, you can either arrange the return yourself, or we can happily arrange it on your behalf for a charge, which will be deducted from your refund. The collection charge covers the expenses involved in picking up the item from your location and safely bringing it back to our warehouse. For bedding items, the amount is £20, and for large/bulky items, charges start from £95 (depending on the product/postcode).
Can I return a part or fully assembled item?
Unfortunately, once an item is assembled, whether partially or fully, we can't accept returns unless the item is faulty.
Read all our Returns FAQs
