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The Hybrid Ultra is a luxury hybrid mattress from Simba, made in Great Britain and built to suit back, front and combination sleepers who share a bed. It combines traditional pocket springs with Simba's titanium alloy Aerocoil™ springs, layered with Simbatex® foam, a latex and coconut PureLift™ support layer and a breathable FusionCool™ blend of wool, bamboo, charcoal and kapok. A soft, zip-off cooling cover with Stratos® technology sits on top, working with graphite-infused foam to help regulate temperature throughout the night. The result is a medium firm feel mattress that keeps you supported and cool, while independently pocketed and titanium alloy springs help minimise disturbance between sleeping partners.
A premium hybrid mattress best suited to sleepers who want medium firm support, effective cooling and minimal partner disturbance.
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
Stratos® Cooling Cover
What it is: A soft, quilted cover that can be zipped off for washing, using Stratos® technology to prevent heat build-up.
How it helps you sleep: Helps you stay cool all night by drawing heat away from the sleep surface.
HeatRelease™ Strips
What it is: Strips using graphite technology, exclusive to Simba in the UK, that move excess heat away from the body. Laboratory testing has shown a continuous heat dissipation of 4.27°C.
How it helps you sleep: Actively draws heat away from you as you sleep, helping to keep the mattress surface cooler for longer.
FusionCool™ Layer
What it is: A unique blend of wool, bamboo, charcoal and kapok positioned just beneath the cover.
How it helps you sleep: Designed for optimum cooling and breathability, helping to regulate your temperature as you sleep.
Simbatex® Foam (Two Layers)
What it is: Two layers of Simba's own graphite-infused foam.
How it helps you sleep: Offers cooling airflow along with optimum elasticity and cushioning for pressure-relieving comfort.
Support Boosting PureLift™
What it is: A blend of latex and coconut fibres positioned for targeted support.
How it helps you sleep: Provides elasticity and spring-like support that promotes optimal spinal alignment.
Aerocoil® Springs (Two Layers)
What it is: A double layer of patented micro springs arranged across thirteen supportive zones.
How it helps you sleep: Designed to support specific parts of the body, such as the hips and shoulders, for tailored comfort.
Stabilising Core Foam Layer
What it is: A CertiPUR® certified foam layer positioned beneath the comfort layers.
How it helps you sleep: Provides structural support and extra airflow to help maintain the mattress's shape.
Aerocoil® Spring Support Layer
What it is: An additional layer of up to 2,500 high carbon steel Aerocoil® springs.
How it helps you sleep: Ensures maximum support is maintained across the full sleeping surface.
SupportCore™ Sprung Base
What it is: Up to 1,000 pocketed, tempered steel barrel springs forming the base of the mattress.
How it helps you sleep: Provides firm, edge-to-edge support with no roll-off, so you can use the full width of the bed.
High-Density Foam Base & Cover
What it is: A CertiPUR® certified foam base finished with a breathable, recycled yarn cover.
How it helps you sleep: Offers stability and support to the whole mattress structure while adding a further layer of breathability.
Handles
What it is: Four handles for ease of movement on Single, Double, and King Size, and eight handles on Super King Size.
How it helps you sleep: Makes it easier to reposition, rotate and manoeuvre the mattress when needed.
Menopause Friendly
What it is: The Hybrid Ultra carries the GenM Menopause Friendly symbol, awarded to products that ease, relieve or support one or more of the 48 symptoms and signs of menopause.
How it helps you sleep: Gives menopausal sleepers added confidence that the mattress's cooling and comfort features have been assessed against their specific needs.
| FEATURE | DETAIL |
|---|---|
| Brand | Simba |
| Category | Mattress |
| Model | Hybrid Ultra |
| Firmness | Medium Firm (4/6) |
| Mattress Type | Hybrid |
| Spring System | Pocket Springs and Aerocoil™ Titanium Alloy Springs |
| Comfort Layers | FusionCool™ Layer, Simbatex® Foam, Support Boosting PureLift™, Stabilising Core Foam Layer, High-Density Foam Base |
| Cover Material | Stratos® Cover |
| Cover Removable/Washable | Yes - top cover removable and machine washable at 40°C on a reduced spin cycle |
| Mattress Finish | Quilted |
| Mattress Depth | 34cm |
| Motion Isolation | Yes |
| Temperature Regulation | Yes - FusionCool™ natural fibres, graphite-infused Simbatex® foam, Stratos® cover, and HeatRelease™ |
| Hypoallergenic | Yes - Simbatex® is dust mite resistant |
| Care Instructions | Rotate only, do not flip. Rotate head to toe once a month for the first three months, then every three months thereafter. |
| Handles | Yes - 4 handles (Single, Double, King Size), 8 handles (Super King Size) |
| Compatible Bed Bases | Slatted (slats no more than 7cm apart and the slats must be more than 5cm wide) and divan bases |
| Single or Double Sided | Single sided - do not flip |
| Country of Manufacture | Great Britain |
| Maximum Weight Per Side | 114kg (18st) |
| 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 mattresses: The Hybrid Ultra's layered foam and Aerocoil™ spring system give more pressure relief at the shoulders and hips than a firmer mattress can offer, while still supporting back and front sleeping positions. If you change position through the night or sleep with a partner, this is likely the more comfortable choice. Firmer mattresses tend to suit heavier sleepers or those who prefer a more rigid, supportive surface.
Vs softer mattresses: This mattress has considerably more structural support beneath its comfort layers, thanks to its dual spring system and stabilising foam core. Softer mattresses can feel more immediately plush but may not maintain spinal alignment as consistently, especially for combination sleepers or couples of different body weights.
Vs premium and luxury mattresses: The Hybrid Ultra shares the same combination of pocket springs, titanium alloy Aerocoil™ springs and cooling technology found in more expensive hybrid mattresses. The difference typically comes down to the depth of the comfort layers rather than any compromise in the underlying support system or build quality.
Note for the buying team: the comparison links above (/mattresses/firm and /mattresses/soft) need path confirmation before this page goes live.
The Hybrid Ultra is backed by Simba's 10 year manufacturer's guarantee against defects in materials and workmanship. Given the combination of high carbon steel and titanium alloy springs with certified foams, this is a mattress built for the long term, and the guarantee reflects that confidence.
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, giving you independent, trusted assurance of the mattress's quality and performance.
B Corp Certified - Simba is certified as a B Corporation, meaning it meets independently verified standards of social and environmental performance, accountability and transparency.
The Hybrid Ultra delivers a genuinely supportive, temperature-regulating night's sleep, combining pocket springs, titanium alloy Aerocoil™ springs and a cooling FusionCool™ and Stratos® cover. If you're a back, front or combination sleeper, share a bed, or simply run hot at night, this is a mattress worth considering.
Choosing a mattress online takes trust. That's why the 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.
Not sure which Simba mattress is right for you? See our Mattress Buying Guide for expert guidance on mattress types, fillings and comfort levels.
| 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
