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Our super king size mattress provides five luxurious layers designed to fit you and help you get the quality of sleep you've been dreaming of.
Our zip-off, washable and hypoallergenic sleep surface is soft to the touch and easy to clean.
We’ve created a super comfort layer designed to tackle overheating and give you extra support.
Our conical springs cradle your body from top to toe and minimise disturbance between couples.
Our Edge Lift technology means no matter where you lie on your mattress you'll feel fully supported.
We’ve added a layer of Visco memory foam which moulds to your body for more restful sleep.
Our durable base has been engineered to give you pressure relieving support in all the right places.
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.
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.
Our five layers of perfect comfort are snugly surrounded by a new 360° high density foam border. It gives our mattress the edge - literally.
We call it Edge Lift. It means whether you're an all-night side-hugger or a morning percher, your Simba Hybrid® Mattress offers the same great support from one corner to the other. So you can kiss goodnight to that rolling off feeling you get from a cheaper mattress.
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.
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).
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
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
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
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.
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.
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.
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.
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.
We’ll keep you up to date with all the latest Simba news & offers