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The Simba Hybrid® Ultra is Simba's flagship hybrid mattress, built around a combined system of pocket springs and titanium alloy Aerocoil™ microsprings and filled with a CoolFusion™ natural fibre blend of kapok, wool and bamboo. Graphite-infused Simbatex® foam and a latex-and-coconut PureLift™ layer deliver a medium-firm feel that keeps you cool, supported and free from partner disturbance. The result is one of the most technically advanced mattresses available, designed for sleepers who want genuine temperature regulation and pressure relief without compromising on support.
A premium hybrid mattress best suited to sleepers who want medium-firm support, effective temperature regulation and minimal partner disturbance, backed by 9 industry awards.
Medium Firm Feel - 4/6: A supportive feel with added stability. Medium Firm is ideal for people who change sleeping position during the night and need a balance of comfort and support. The Simba Ultra sits on the firmer side of medium, with a plush top layer that cushions without sacrificing the underlying structure.
Best for
Not ideal for
Pocket Springs and Aerocoil™ Titanium Alloy Springs
What it is: A combined system of up to 7,300 traditional pocket springs and Simba's patented titanium alloy Aerocoil® microsprings. Each spring is individually enclosed and moves independently from its neighbours.
How it helps you sleep: Provides exceptional pressure relief and motion isolation - so your partner's movements stay on their side. As the Aerocoil springs compress, they push fresh air through the mattress, helping to regulate your temperature throughout the night.
CoolFusion™ Layer
What it is: Simba's luxury top layer crafted from a blend of kapok, wool, and bamboo designed to enhance comfort and regulate temperature.
How it helps you sleep: Ensures a cool and refreshing sleep experience all night long through the natural temperature-regulating and moisture-wicking properties of its premium natural fibres.
Graphite Infused Simbatex®
What it is: Simba's advanced foam with graphite temperature-regulating properties providing superior pressure relief and spinal alignment.
How it helps you sleep: Keeps you cooler by drawing heat away from the body, while the hypoallergenic properties promote a healthier sleep space and the eco-friendly production process is kinder to the planet.
Support Boosting PureLift™
What it is: Simba's unique fusion of latex and coconut fibres that provides targeted support for optimal comfort and alignment.
How it helps you sleep: Enhances the mattress with targeted support that promotes optimal spinal alignment and comfort, helping you wake feeling rested and free from aches.
CertiPure Foam Layers
What it is: Simba's high-quality certified foam layers free from harmful chemicals, with an open-cell structure for improved airflow.
How it helps you sleep: Provide excellent support and pressure relief with enhanced breathability for a cooler sleeping environment, while the certification guarantees a healthier sleep product.
Simba Regen Base Layer
What it is: Simba's eco-friendly supportive base layer made from recycled materials for increased durability and performance.
How it helps you sleep: Provides consistent comfort and pressure relief for a refreshing sleep experience while using eco-friendly recycled materials for a more responsible sleep product.
Stratos® Cool-Touch Cover
What it is: A knitted polyester top cover with Stratos® cool-touch technology and a zip-off, washable sleep surface.
How it helps you sleep: Provides an immediate cooling sensation at the surface, helping to prevent heat build-up from the very first moment you get into bed.
| FEATURE | DETAIL |
|---|---|
| Brand | Simba |
| Category | Mattress |
| Model | Hybrid Ultra |
| Firmness | Medium Firm (4/6) |
| Mattress Type | Hybrid with pocket springs and titanium alloy microsprings |
| Foam Free | No |
| Spring System | Pocket Springs and Aerocoil™ Titanium Alloy Springs |
| Spring Count | Up to 7,300 |
| Comfort Layers | CoolFusion™ (kapok, bamboo-infused wool) Graphite Infused Simbatex® PureLift™ (latex and coconut) CertiPUR® foam |
| Cover Material | Knitted polyester with Stratos® cool-touch technology |
| Cover Removable/Washable | Yes - machine washable at 40°C on a reduced spin cycle |
| Mattress Finish | Quilted cover |
| Mattress Depth | 34cm |
| Motion Isolation | Yes |
| Temperature Regulation | Yes - CoolFusion™ natural fibres, graphite-infused Simbatex® foam and Stratos® cover |
| Hypoallergenic | Yes - Simbatex® is dust mite resistant |
| Care Instructions | Rotate head to toe once a month for first three months, then every three months thereafter. |
| Handles | Yes - flag-stitched (4 handles; 8 on Super King) |
| 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, hot sleepers, couples |
| Certifications | National Bed Federation (NBF) ApprovedGood Housekeeping Institute ApprovedB Corp Certified |
| Fire Resistance | BS7177:2008 compliant |
| Sustainability | CertiPUR® certified foamsEco-friendly Simba Regen base layer from recycled materialsSuitable for recycling via specialist providers |
| Packaging Type | Flat-packed |
| SIZE | WIDTH x LENGTH x DEPTH | WEIGHT |
|---|---|---|
| Single | 90cm (3ft) x 190cm (6ft3) x 34cm (13.4'') | 37kg (81lbs) |
| Double | 135cm (4ft6) x 190cm (6ft3) x 34cm (13.4'') | 51kg (112lbs) |
| King Size | 150cm (5ft) x 200cm (6ft6) x 34cm (13.4'') | 57kg (126lbs) |
| Super King Size | 180cm (6ft) x 200cm (6ft6) x 34cm (13.4'') | 69kg (152lbs) |
Vs firmer models: The CoolFusion™ natural fibre top layer and Simbatex® foam layers give the Ultra noticeably more pressure relief than firmer Simba models, particularly across the hips and shoulders. If you share a bed or run hot at night, the Ultra is likely the better choice. Firmer options suit heavier sleepers or those who prefer minimal surface cushioning.
Vs softer models: The Ultra's combined spring system provides more structural support than softer Simba mattresses. Softer options may feel more immediately luxurious but can compromise spinal alignment for back or front sleepers, particularly over time. The Ultra offers the comfort of a plush top without sacrificing the underlying support structure.
Vs the Simba Hybrid® Luxe: The Ultra sits above the Luxe in Simba's range, with a higher spring count (up to 7,300 vs up to 5,700), two Simbatex® foam layers rather than one, and the exclusive CoolFusion™ natural fibre comfort layer. Both share the same quality of construction and titanium alloy spring technology; the Ultra simply delivers more of it.
The Simba Hybrid® Ultra comes with Simba's 10-year manufacturer's guarantee against defects in materials and workmanship. If the mattress fails within that time, Simba will exchange it for a new one. With CertiPUR® certified foams, titanium alloy springs and a durable base layer, this is a mattress built to go the distance.
The Simba Hybrid® Ultra has received 9 awards and accreditations, including:
National Bed Federation (NBF) Approved - Independently verified to meet strict UK standards for quality, safety and responsible manufacturing.
Good Housekeeping Institute Approved - Tested and approved by the Good Housekeeping Institute, one of the UK's most trusted consumer testing bodies.
The Independent Best Buy 2026 - Named a best buy by The Independent, recognising outstanding performance across comfort, value and innovation.
The Telegraph Recommended 2023 - Recommended by The Telegraph's sleep and wellbeing experts.
T3 Platinum Award - T3's highest honour for technology and product excellence in the sleep category.
Get the most out of your new Simba Hybrid® Ultra by adding the Simba Performance Mattress Protector. Designed to protect 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 Simba Hybrid® Ultra delivers exceptional cooling, pressure relief and partner disturbance isolation across 11 precision-engineered layers. With 9 awards, 200 nights to try it and a 10-year guarantee, it's the right choice for back or front sleepers, hot sleepers, and couples who both want an undisturbed night.
Choosing a mattress online takes trust. That's why the Simba Hybrid® Ultra 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 34cm 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
