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The Natural Hybrid® Source is a foam-free hybrid mattress from Simba, handcrafted in Great Britain. It is built around a dual spring system - 1,900 titanium alloy Aerocoil® micro springs over a 1,000-spring CoreMax™ zoned barrel spring base - and upholstered with Hampshire wool and British wool layers throughout. The result is a medium firm mattress that delivers targeted pressure relief, natural temperature regulation and effective motion isolation, with no foam anywhere in the construction.
A premium foam-free hybrid mattress best suited to sleepers who want medium firm support, natural temperature regulation and effective partner disturbance isolation, built with British wool and 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
Hampshire Wool and British Wool Layers
What it is: Layers of 100% wool sourced from UK farms - Hampshire wool through the Traceable British Wool Scheme and British wool - providing cushioning and stability throughout the mattress.
How it helps you sleep: Natural wool regulates body temperature, keeping you cool in summer and warm in winter. Its hygroscopic properties wick moisture away throughout the night, promoting a fresh, dry sleeping environment.
Aerocoil® Titanium Alloy Pocket Springs
What it is: Up to 1,900 conical, individually pocketed titanium alloy micro springs manufactured in Leeds.
How it helps you sleep: Each spring compresses independently in response to your body weight and movement, providing targeted pressure relief and minimising partner disturbance. As they compress, the conical shape pushes fresh, cool air upward through the mattress.
CoreMax™ 7-Zone Barrel Spring Base
What it is: Up to 1,000 high carbon steel barrel springs manufactured in Hampshire, arranged across seven support zones with a reinforced steel frame border.
How it helps you sleep: Provides firm, structured support that extends to the very edge of the mattress, reducing roll-off. The seven zones correspond to different areas of the body such as hips and shoulders for targeted, consistent support throughout the night.
Plant-Derived Viscose Cover
What it is: A non-removable cover made from plant-based viscose fibres, with a bio-based fire retardant treatment on the top surface and sides.
How it helps you sleep: Provides a silky smooth, breathable sleep surface that works with the wool fillings and open spring structure to keep air flowing freely through the mattress.
| FEATURE | DETAIL |
|---|---|
| Brand | Simba |
| Category | Mattress |
| Model | Natural Hybrid® Source |
| Firmness | Medium Firm (4/6) |
| Mattress Type | Hybrid with pocket springs and natural wool fillings |
| Foam Free | Yes |
| Spring System | Aerocoil® Titanium Alloy Pocket Springs |
| Spring Count | 2,900 |
| Comfort Layers | Hampshire Wool, British Wool |
| Cover Material | Plant-derived viscose |
| Mattress Finish | Hand Tufted |
| Mattress Depth | 28cm |
| Edge Support | Yes - CoreMax™ reinforced steel frame border |
| Motion Isolation | Yes |
| Temperature Regulation | Yes - British wool layers and 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. |
| 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 |
| 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 woolGlobal 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 28cm (11'') | 23.4kg (52lbs) |
| Double | 135cm (4ft6) x 190cm (6ft3) x 28cm (11'') | 35.1kg (77lbs) |
| King Size | 150cm (5ft) x 200cm (6ft6) x 28cm (11'') | 41kg (90lbs) |
| Super King Size | 180cm (6ft) x 200cm (6ft6) x 28cm (11'') | 49.2kg (108lbs) |
Vs softer models: The Source prioritises support over sink-in cushioning. If you sleep mainly on your side or carry less body weight, a softer mattress will provide more pressure relief at the shoulder and hip. The Source is at its best for back, front and combination sleepers who want a firm, natural feel.
Vs the Natural Hybrid® Escape: The Escape adds a second layer of Aerocoil® springs and an extra British wool stability layer. If you share a bed and want noticeably better motion isolation, or simply want a deeper, more cushioned feel without changing the medium firm tension, the Escape is the natural step up.
Vs the Natural Hybrid® Apex: The Apex carries the highest spring count in the range with three Aerocoil® layers, plus a Cashgora wool and silk top layer for the finest natural comfort Simba makes. The Source gives you the same foam-free, British-made construction and Aerocoil® technology at a more accessible price point.
The Natural Hybrid® Source is backed by Simba's 10-year manufacturer's guarantee against defects in materials and workmanship. Built with premium natural materials and precision-engineered springs, this is a mattress designed to last well beyond the length of its guarantee.
The Natural Hybrid® Source has received 8 awards and accreditations, including:
Good Housekeeping Institute Approved - Independently tested and approved by the Good Housekeeping Institute. Only products that meet the GHI's rigorous testing standards earn this endorsement.
As Seen in The Telegraph - Recognised and recommended by The Telegraph's editorial team, confirming its status as a top-rated sleep product in the UK press.
T3 Best Mattress - Awarded Best Mattress by T3 magazine following expert hands-on testing against competing products in the category.
SleepHero Recommended - Recommended by SleepHero following expert review, recognising the Source's quality construction and sleep performance.
Best UK Mattress - Recognised as one of the best mattresses available in the UK market by an independent panel of sleep experts.
Get the most out of your new Natural Hybrid® Source 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® Source delivers firm, structured support from a dual spring system, natural temperature regulation from British and Hampshire wool, and a foam-free construction that is better for you and the planet - all handcrafted in the UK and backed by a 10-year guarantee. If you sleep on your back or front, share a bed, or want a long-lasting natural mattress that will never go to landfill, this is a strong place to start.
Choosing a mattress online takes trust. That's why the Natural Hybrid® Source comes with a 200 night comfort guarantee - if it doesn't feel right, we'll exchange it. View the full mattress trial policy.
| WHAT'S INCLUDED? | |
|---|---|
| Mattress | Yes |
| Base | No |
| Headboard | No |
PLEASE NOTE:
All measurements are approximate and are subject to a tolerance of + or - 2cm.
Image is for illustration purposes only.
Pillows, cushions, throws and bed dressings not included.
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 28cm 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.
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
