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King Size Mattresses

A Simba king size mattress will transform your sleep, thanks to the award-winning sleep technology we’ve layered up inside; titanium micro springs prevent motion transfer between partners and encourage air circulation, while cooling Simbatex® foam allows 30 x more airflow than memory foam. All of which adds up to a superbly comfortable king size mattress, and cooler, disturbance-free sleep.

Join over 1 million other happy Simba customers and discover the best Simba king size mattress for you and your partner.

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40% VOUCHER SAVE £944 AT CHECKOUT
hybrid  Simba Hybrid® Luxe Mattress

Latest Tech - Most Plush

Simba Hybrid® Luxe Mattress, King

  • 10 Layers

  • Up to 6000 Springs

  • 31cm Depth

  • Bamboo Infused Wool Layer

FREE Mattress Protector
40% OFF VOUCHER
SAVE £944 AT CHECKOUT

£2,359
Or £59.24 monthly

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40% VOUCHER SAVE £676 AT CHECKOUT
hybrid  Simba Hybrid® Pro Mattress
  • 7 Layers

  • Up to 5000 Springs

  • 28cm Depth

  • Pure wool layer

FREE Mattress Protector
40% OFF VOUCHER
SAVE £676 AT CHECKOUT

£1,689
Or £42.41 monthly

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40% VOUCHER SAVE £472 AT CHECKOUT
hybrid  Simba Hybrid® Mattress
  • 5 Layers

  • Up to 2500 Springs

  • 25cm Depth

  • Original Hybrid® design

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£1,179
Or £29.60 monthly

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40% VOUCHER SAVE £420 AT CHECKOUT
hybrid Simba Hybrid® Essential Mattress
  • 4 Layers

  • Up to 1500 Springs

  • 20cm Depth

  • Entry-level Hybrid comfort, UK sizes only

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SAVE £420 AT CHECKOUT

£1,049
Or £26.34 monthly

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organic  Simba GO Mattress

sustainable comfort

Simba GO Mattress, King

  • 6 Layers

  • Up to 3000 Springs

  • 30cm Depth

  • Certified Organic Latex layer

FREE Mattress Protector
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£2,359
Or £59.24 monthly

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40% VOUCHER SAVE £360 AT CHECKOUT
simbatex® foam  Simbatex® Foam Mattress
  • 4 Layers

  • 25cm Depth

  • Graphite/Simbatex open cell foam, UK sizes only

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SAVE £360 AT CHECKOUT

£899
Or £22.57 monthly

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40% VOUCHER SAVE £220 AT CHECKOUT
simbatex® foam Simbatex® Essential Mattress
  • 3 Layers

  • 19cm Depth

  • Graphite/Simbatex open cell foam, UK sizes only

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£549
Or £13.78 monthly

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60% OFF SAVE £1,415
refurbished Simba Hybrid Luxe Mattress, Refurbished
  • 10 Layers

  • Up to 6000 Springs

  • 31cm Depth

  • Bamboo Infused Wool Layer

£943.60 £2,359
Or £23.69 monthly

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60% OFF SAVE £1,013
refurbished Simba Hybrid Pro Mattress, Refurbished
  • 7 Layers

  • Up to 5000 Springs

  • 28cm Depth

  • Pure Wool Layer

£675.60 £1,689
Or £16.96 monthly

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60% OFF SAVE £707
refurbished Simba Hybrid Mattress, Refurbished
  • 5 Layers

  • Up to 2500 Springs

  • 25cm Depth

  • Original Hybrid® design

£471.60 £1,179
Or £11.84 monthly

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60% OFF SAVE £629
refurbished Simba Hybrid Essential Mattress, Refurbished
  • 4 Layers

  • Up to 1500 Springs

  • 20cm Depth

  • Entry-level Hybrid comfort, UK sizes only

£419.60 £1,049
Or £10.53 monthly

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  • What size is a King size mattress?

    The Simba King Bed mattress is suitable for all standard UK King size beds, measuring 150cmW x 200cmL; the depth of your king size mattress depends on the range and model you choose. We also offer a range of the slightly wider European Queen Mattresses, and for an even more luxurious sleep space have a look at our Super King Mattresses.

  • Why choose a King size mattress?

    King size mattresses generally offer plenty of sleep space without taking up the whole bedroom; they’re perfect if you like to stretch out, and they’re ideal for couples. But here at Simba our King size mattresses are engineered with award-winning sleep tech which keeps you cooler and prevents your partner’s movement disturbing your sleep.

    But if you’re concerned you may not have room for a King size mattress, don’t worry; we offer a wide variety of Double Mattresses which feature all the same ingenious tech for heat control and balanced support. We also have a range of Small Double Mattresses, as well as Single Mattresses if you prefer a twin bed set up.

  • Find out which Simba king size mattresses we recommend for common sleep issues:

  • Which is Simba’s best king size mattress for my sleeping position?

    Back and side sleepers need zoned support for areas like shoulders and hips, while front sleepers need reliable support to promote the correct alignment of the neck and spine.

    Both our Hybrid® king size mattresses and our Green Organic king size mattress offer excellent support for all sleeping styles; the combination of our patented titanium micro springs with pressure relieving foam or organic latex keeps your spine and body comfortably and correctly aligned however you sleep.

    Recommended King Size Bed Mattress: Any of our Hybrid® King size mattresses, or our Green Organic King Size Mattress.

  • Which is Simba’s best king size mattress for limiting partner disturbance?

    Whether you just have different routines, or one of you is a light or fidgety sleeper, being woken up by your partner is one of the most common sleep problems.

    Our unique Aerocoil® springs in our Hybrid® and Green Organic king size mattresses are specifically designed to offered tailored support to each partner, and to prevent the transfer of movement from one partner to another; their conical design means they compress inwards rather than sideways, and their small but mighty size, means they’re able to work unnoticed at the top of the mattress for optimum efficiency.

    Recommended King size mattress: If your budget allows, it’s a good idea to opt for the models with the highest number of springs, which is the Hybrid® Pro King Size mattress or the Hybrid® Luxe King Size mattress.

  • Which is Simba’s best king size mattress for heat control?

    You may not be aware, but your body temperature naturally drops a few degrees when you sleep; that process is interrupted or even blocked if you’re too warm and sharing a bed can make it worse.

    But the good news is that all our king size mattresses are designed to help keep you cool; patented Aerocoil® springs push air gently through the top layers of the Hybrid and Organic mattresses, while our Hybrid® and foam mattresses feature our Simbatex® foam which offers 30 x cooler airflow than dense sticky memory foam. The Green Organic king size mattress uses latex instead of foam, but Latex is a breathable material and we’ve added perforations to further encourage airflow through the mattress.

    Recommended king size mattress: All our king size mattresses are designed for cooler sleep, but the Green Organic king size mattress is our most eco-friendly option, and our Simbatex® foam king size mattresses are ideal If you ‘re on a budget.

  • Which is Simba’s best king size mattress for helping to prevent back pain?

    Waking up with aches and pains is a sign of incorrect spinal alignment or poor support.

    If this is something that affects you, opt for a deeper mattress with extra layers of supportive Aerocoil springs such as the Hybrid Luxe. Alternatively the Latex layer of Green Organic King size mattress offers superb cushioning and unrivalled pressure point relief.

    Recommended king size mattress; the Hybrid Luxe or the Organic Go king size mattress.

    If you’re still not sure which king size mattress is best for you, have a look at All Mattresses.

  • Which is Simba’s most eco-friendly king size mattress?

    All our king size mattresses are 100% recyclable, but we’re also committed to more responsible sourcing and use of materials - which means we need to start using materials which are recycled as well as recyclable.

    That’s why we’ve developed the Organic GO mattress. Its main comfort layer is Latex; while this a naturally a renewable material, the Latex we use is GOLS (Global Organic Latex standard) certified as organic and responsibly produced from field to factory. The organic mattress also features components made from up to 75% recycled materials as well as GOTS (Global Organic Textile Standard) certified cotton.

    Recommended King size mattress: The Green Organic king size mattress

  • I’m on a budget. Which king size mattress is best for me?

    It’s important to us that everyone has access to great sleep, whatever their budget. That’s why we developed our Simba Essential King Size Mattress, which offers our classic Hybrid® mattress technology at a comfortable price. Alternatively, both our king size foam mattresses feature our open cell Simbatex® foam, helping to prevent overheating and offering good support.

    Recommended King size mattress: Simbatex® or Simbatex® Essential King size Foam Mattress.

  • How are Simba King size mattresses delivered and how much does it cost?

    All deliveries are free! Our King size mattresses are vacuum packed and then boxed; it’s eco-friendlier to transport and it’s a lot easier to get up the stairs. Just allow your new mattress 48 hours to fully regain its shape.

    You have a whole year to decide whether you are happy with your purchase. But if things aren’t quite as you’d like, we’ll come and collect your king size mattress from you, free of charge.

  • Can I buy a refurbished mattress for a king size bed?

    Yes, any king size mattresses that are returned to us are rigorously inspected then either recycled or refurbished by our expert renewal team; not only is it more responsible but it also gives everyone the opportunity to enjoy the full Simba sleep experience at a fraction of the price.

    We check, deep clean and sanitise very single component, replacing them where necessary, before a final inspection o receive a certified Simba guarantee.

    For more information check our range of Refurbished Mattresses.

  • How to care for and maintain your King size mattress

    You’ll be relieved to hear you don’t need to wrestle your Simba King size mattress over onto its other side at any stage. We do recommend however that you rotate it head to foot once a month for the first three months,

    As for keeping it clean, all Simba mattresses feature a machine washable cover you can zip off and on again as required; it’s also a good idea to invest in one of our quilted cotton Mattress Protectors to protect your mattress from accidental spillages and general wear and tear.

  • Do Simba also offer mattresses in larger sizes?

    Absolutely. The largest mattresses we offer are the Super King mattresses, while for longer, European size beds we have European Double Mattresses and European Queen Size Mattresses

Which is the best Simba King Size mattress for me?

Identifying which of our king bed mattresses is best for you depends on several things: your sleeping position, specific issues like back ache or overheating, and of course your budget. We have three ranges of king size mattresses: Hybrid®, Organic and Foam. Here’s a quick summary of what they offer:

Green Organic king size mattress

A more sustainable produced blend of certified organic, breathable Latex and our cooling Aerocoil® micro springs. It’s the ideal mattress if you care about the planet as much as your sleep.

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Hybrid® king size mattress

Our most popular range, this is the original, award-winning combination of our signature cushioning Aerocoil® micro springs and open-cell foam (it’s 30 times cooler than memory foam).

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Simbatex® Foam king size mattress

Our open-cell Simbatex® foam is less dense to it offers more elasticity and 30 times more airflow than traditional memory foam - so you’ll sleep more comfortably and cooler. This is the best king size mattress to consider if money is tight. If you’re still not sure which mattress to choose, then head over to our Compare Mattresses page for more information.

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