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Simba Hybrid® Super King Size Mattress

A super king size mattress from Europe's favourite mattress-in-a-box brand. Experience the future of sleep: 3,000 revolutionary springs for comfort and cooling where it counts, plus support that's got your back.

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  • Free Delivery
  • 100 Night Sleep Trial
  • 10 Year Guarantee

A hybrid like no other

We changed the way springs are used in a hybrid, so in our super king size mattress you can float in comfort over a unique support system.

Hybrid Mattress

Breathable sleep surface

With up to 700g of super soft, hand-knitted goodness, our hypoallergenic sleep surface gives your mattress an airy lightness that protects and comforts.

Airflow comfort layer

Our open cell Simbatex foam tackles overheating, while also layering on the comfort.

Patented comfort springs

Our super light, cone-shaped springs retract to distribute pressure, flexing to you individually without motion transfer.

Edge to edge support

Our Edge Lift technology means no rolling off or dipping down at the sides; just Simba support wherever you lie.

Reflex support layer

Your cloud-like comfort zone needs a supportive springboard — exactly what this foam layer provides.

Zoned base layer

High definition foam can be expertly zoned to give the right support for each area of your body. So of course we did just that.

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Country Of Origin

All Simba mattresses are sourced and made in Europe : we work with well-known, state-of-the-art super king size mattress factories in UK and Poland.


UK Sizes

  • Single : W90 L190 D25 (cm)
  • Small Double : W120 L190 D25 (cm)
  • Double : W135 L190 D25 (cm)
  • King Size : W150 L200 D25 (cm)
  • Super King Size : W180 L 200 D25 (cm)

EU Sizes

  • EU Small Single : W80 L200 D25 (cm)
  • EU Single : W90 L200 D25 (cm)
  • EU Double : W140 L190 D25 (cm)
  • EU Double L : W140 L200 D25 (cm)
  • EU Queen : W160 L200 D25 (cm)

Mattress Technology

The Simba Hybrid® Mattress is 25cm deep.
  • Simbatex® open cell foam
    Density: 60kg/m3. Depth: 3.5cm

  • Up to 2,500 conical pocket springs
    25mm conical spring, enclosed in a 100% polyester pocket
  • Luxury grade polyether support foam
    Density: 50kg/m3. Firmness : 60N. Depth: 3.5cm.

  • High Density Foam
    33kg/m3 density. Firmness : 140N. Depth: 16cm

For more info, please head to our FAQ.

Product Care

The top white sleep surface can be unzipped and machine washed at 40 degrees. The grey base fabric can be cleaned with a soft, damp and clean cloth using small circular motions. Using a super king size mattress protector could help extend the life of your mattress.

Delivery Information

  • Free standard deliveries are processed via UPS.
    This a 1-3 day tracked service, and UPS will deliver your mattress to the first door.
  • Arrow XL is a Premium 2-Man Delivery Service, delivering to a room of your choice. It is a diary booking or 48-hour service Monday - Saturday when ordered before 5pm. Removal of your old mattress can also be requested at checkout. Your old mattress will be recycled.

100 Night Trial and Returns

We offer you 100 nights to to make sure the super king size mattress is just right for you. If you are not 100% happy with it for any reason during the 100 day sleep trial, we will arrange a free pickup of your super king size mattress and refund the cost of your super king size mattress (less any delivery costs), no questions asked.


Every Simba super king size mattress comes with a 10 year guarantee. If your super king size mattress fails during the 10 year warranty period, we'll exchange it for a brand new one. It's that simple!


At Simba, we take great care to ensure the lowest environmental impact possible from production to delivery.


Our foams have all received the CertiPUR label, meeting the requirements of unwanted chemicals in foams. No destructive agents of ozone, heavy metals, flame retardants, mercury or lead have therefore been used for their manufacture. They are also perfectly safe and suitable for everyone.

The super king size mattress for every body

Woman lying on mattress, showing cross section of mattress layers

Front, back and side sleepers

Face down, curled up or sprawled out? It turns out it doesn't matter. We designed our super king size mattress using data from 10 million sleepers, so however you sleep we've got you covered.

Don't disturb your partner

The Simba Hybrid's flexible zoned base and unique patented springs respond individually to each sleeper, so your movement doesn't affect your partner. Household harmony restored.

Try it risk-free in your own home

We’re confident you’ll love your Simba super king size mattress . But just in case we’ve made it as easy to return as it was to buy.

Free most of UK delivery

Every Simba super king size mattress comes with flexible delivery options, including free delivery which takes between two and five working days. If you decide to return your Simba, we’ll collect it for free (and don’t worry, we wouldn’t dream of asking you to get it back in the box).

Read more: Delivery info | Returns

Old mattress removal

Choose our £40 premium delivery option at the checkout, and we’ll take away your old mattress when we deliver your new Simba.

Read more: Delivery info

100-night trial

We give you 100 nights to make sure Simba is right for you. If it’s not a perfect match, you can return your mattress for any reason. We’ll even pick it up, so there’s nothing to lose sleep over.

Read more: 100 night trial

10-year guarantee

Our mattress is built to last - so we’ve got your back for a decade. If it fails during that time, we’ll swap it for a brand new one. It’s that simple.

Read more: 10-year guarantee

Happy super king size mattress Sleepers

We're listening... Everything we do, we do to make sure you get the best night's sleep, so please leave a review below and tell us what you think of Simba.

About the Product

What's a super king size mattress?

A super king size mattress measures 180cm x 200cm x 25cm, making it 30cm (or a foot) wider than a standard UK king size. In old money, it's 6 feet wide.

Why choose a super king size mattress?

In many retailers, a super king size mattress is the largest size available (we have one more!). Similar to a US king size, these offer the luxury of incredible space for couples - like having a standard UK single each - with plenty of room for kids and pets to clamber in for lazy Sunday morning snuggles. They need plenty of clearance space, but the area under the bed can be used to keep clutter out of sight, depending on the height and style of the base. If you're lucky enough to have a sizeable bedroom, or can move wardrobes and drawers into a separate dressing space, they're well worth the investment in dreamy comfort.

What kind of super king size mattresses are available?

Traditional spring super king size mattress: Usually found in guest bedrooms as an economical option, the springs in these old fashioned coil mattresses are joined to each other. So there's plenty of support, but the bouncing can get a bit much (if it's not creaking too).

Pocket spring super king size mattress: Pocket spring mattresses offer more flexible support by placing each spring individually into a fabric pocket. These mattresses often still use bigger, cylindrical box springs, with all the pros and cons those offer.

Memory foam super king size mattress: Memory foam is a type of viscoelastic which moulds to the body, making memory foam mattresses very comfortable. However, they're also known for trapping heat and can go softer as they warm up, giving sleepers a sweaty, sinking feeling.

Latex super king size mattress: Latex mattresses are made with latex foam, which is considered a natural product. Bouncier than memory foam, latex is not as good at preventing motion transfer, and tends to be heavier and more expensive.

Hybrid super king size mattress: Hybrid mattresses bring together two different kinds of traditional design, such as springs and foam. This aims to combine the advantages of both, without the limitations - so you get comfort and support without overheating or bouncing around.

What's special about the Simba Hybrid® super king size mattress?

As an innovative, unique hybrid mattress, the Simba Hybrid® super king size mattress offers the same award-winning comfort at every size. Our British steel micro springs are smaller and lighter than traditional clunky box springs, which means that there's no see-saw effect when sharing a bed. They're also specially shaped using a patented design to move individually around the hips, spine and shoulders, providing hundreds of points of pressure relief. The Simba Hybrid® super king size mattress has a spring count of 3,000 conical pocket springs, more than some traditional super king size mattresses, matched to a thick layer of visco memory foam for cloud-like comfort.

The Simba Hybrid® Mattress also has a unique comfort layer made of open cell foam which, combined with the air flow offered by the spring layer and breathable sleep surface, makes for altogether cooler, more chilled out nights.

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