Your Cart

Your cart is currently empty.

Shop Now
You're saving
Subtotal
Pay Now: £0.00 OR Payments from: £0.00
Checkout

Goes like a dream with

WHY NOT TRY OUR AWARD-WINNING SLEEP TECH?

UP TO 25% OFF SELECTED MATTRESSES  (T&Cs)

King Size Mattresses

When it comes to couples, king mattresses are… well, king. So we’ve made sure every Simba king size mattress has an expert blend of our patented Aerocoil® springs – designed to minimise motion transfer – and our fresh Simbatex® foam. Together, they make a superbly comfortable king size mattress that helps you (and your partner) sleep longer and deeper.

Filter

Sort by

Sort by:

RECOMMENDED BEST COMFORT & SUPPORT
SAVE £750
Hybrid® Ultra Mattress hybrid

The best of everything

Hybrid® Ultra Mattress

  • 11 Layers

  • Up to 7300 Springs

  • 34cm Depth

  • FusionCool™ Layer

King £2,249.25£2,999 †
Or £56.26 monthly
Shop
LUXURY COMFORT & SUPPORT
SAVE £504
Hybrid® Luxe Mattress hybrid

Luxury Support

Hybrid® Luxe Mattress

  • 9 Layers

  • Up to 5700 Springs

  • 31cm Depth

  • Bamboo & Wool top layer 

King £1,295.28£1,799 †
Or £32.39 monthly
Shop
SAVE £312
Hybrid® Pro Mattress hybrid

Bestselling

Hybrid® Pro Mattress

  • 8 Layers

  • Up to 4800 Springs

  • 28cm Depth

  • Wool top layer

King £936.75£1,249 †
Or £23.43 monthly
Shop
SAVE £207
Hybrid® Original Mattress hybrid

1/2 Million Sold

Hybrid® Original Mattress

  • 5 Layers

  • Up to 1900 Springs

  • 25cm Depth

  • 9 support zones

King £692.23£899 †
Or £17.31 monthly
Shop
SAVE £150
Hybrid® Essential Mattress hybrid

Budget Friendly

Hybrid® Essential Mattress

  • 4 Layers

  • Up to 1000 Springs

  • 20cm Depth

  • 5 Support zones

King £599.20£749 †
Or £14.98 monthly
Shop
SAVE £525
Earth Apex Mattress earth

The peak of luxury

Earth Apex Mattress

  • 12 Layers

  • Up to 6,700 Springs

  • 32cm Depth

  • Cashgora, silk & wool layers

King £1,574.25£2,099 †
Or £39.37 monthly
Shop
SAVE £486
Earth Escape Mattress earth

Sleep sanctuary

Earth Escape Mattress

  • 10 Layers

  • Up to 4,800 Springs

  • 30cm Depth

  • British wool comfort layers

King £1,313.27£1,799 †
Or £32.84 monthly
Shop
SAVE £325
Earth Source Mattress earth

Oasis of comfort

Earth Source Mattress

  • 8 Layers

  • Up to 2,900 Springs

  • 28cm Depth

  • British wool comfort layers

King £974.25£1,299 †
Or £24.36 monthly
Shop
Hybrid® Ultra Mattress Refurbished refurbished

The best of everything

Hybrid® Ultra Mattress Refurbished

  • 13 Layers

  • Up to 8,500 Springs

  • 34cm Depth

  • FusionCool™ Layer

King £1,349
Or £33.74 monthly
Shop
Hybrid® Luxe Mattress Refurbished refurbished

Latest Tech - Most Plush

Hybrid® Luxe Mattress Refurbished

  • 11 Layers

  • Up to 5000 Springs

  • 31cm Depth

  • Bamboo Infused Wool Layer

King £1,119
Or £27.99 monthly
Shop
Hybrid® Pro Mattress Refurbished refurbished

Double Support

Hybrid® Pro Mattress Refurbished

  • 9 Layers

  • Up to 4000 Springs

  • 28cm Depth

  • Pure Wool Layer

King £599
Or £14.98 monthly
Shop
Hybrid® Original Mattress Refurbished refurbished

1/2 MILLION SOLD

Hybrid® Original Mattress Refurbished

  • 7 Layers

  • Up to 2000 Springs

  • 25cm Depth

  • Original Hybrid® design

King £449
Or £11.23 monthly
Shop
Hybrid® Essential Mattress Refurbished refurbished

Comfortable Price

Hybrid® Essential Mattress Refurbished

  • 4 Layers

  • Up to 1500 Springs

  • 20cm Depth

  • Entry-level Hybrid comfort, UK sizes only

King £519
Or £12.98 monthly
Shop
Earth Source Mattress Refurbished refurbished

Oasis of comfort

Earth Source Mattress Refurbished

  • 6 Layers

  • Up to 3,250 Springs

  • 25cm Depth

  • Hemp & Flax layer

King £649
Or £16.23 monthly
Shop
Earth Escape Mattress Refurbished refurbished

Sleep sanctuary

Earth Escape Mattress Refurbished

  • 7 Layers

  • Up to 4250 Springs

  • 28cm Depth

  • Wool & Hemp layer

King £1,149
Or £28.74 monthly
Shop
Earth Apex Mattress Refurbished refurbished

The peak of luxury

Earth Apex Mattress Refurbished

  • 8 Layers

  • Up to 5750 Springs

  • 30cm Depth

  • Silk, Cashmere & Mohair layer

King £1,449
Or £36.24 monthly
Shop
Simbatex® Essential Mattress Refurbished refurbished

budget friendly

Simbatex® Essential Mattress Refurbished

  • 3 Layers

  • 19cm Depth

  • Graphite/Simbatex open cell foam, UK sizes only

King £259
Or £21.58 monthly
Sold out
Simbatex® Foam Mattress Refurbished refurbished

Cooler, Fresher Foam

Simbatex® Foam Mattress Refurbished

  • 4 Layers

  • 25cm Depth

  • Graphite/Simbatex open cell foam, UK sizes only

King £449
Or £11.23 monthly
Sold out
CLEARANCE Premium Zoned Mattress

Full body comfort

Premium Zoned Mattress

  • 3 Layers

  • 19cm Depth

  • 7 Support Zones

King £279
Or £23.25 monthly
Shop
CLEARANCE Comfort Zoned Mattress

Support made simple

Comfort Zoned Mattress

  • 3 Layers

  • 19cm Depth

  • Multiple Support Zones

King £234
Or £19.50 monthly
Shop

  • 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, but the depth of your king size mattress depends on the range and model you choose. For example, our Earth range is packed with some of nature’s best materials and our signature sleep tech: the Apex model measures 30cm deep, the Hybrid® Ultra is our deepest mattress at 34cm, meanwhile our Hybrid® Essential is just 20cm deep. That's why we suggest checking these details before buying. 

    We also offer a range of slightly wider European Queen Mattresses, and for an even more luxurious sleep space have a look at our Super King Size Mattresses. 

    Head over to All Mattresses for more details about our range. 

  • 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, designed to limit your partner’s movement and offer a fresher sleep. 

    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 fresher sleep and balanced support. We also have Small Double Mattresses, as well as Single Mattresses if you prefer a twin bed set up. 

  • Why choose a Simba Hybrid® king size mattress?

    Every Simba Hybrid® King size mattress is packed with our unique, sleep technology. It’s engineered to help you sleep longer and deeper, all night and every night, thanks to our innovative Aerocoil® springs and our Simbatex® foam. And you'll find it in every single one of our Hybrid® Mattresses.

  • What makes the Simba Earth range so special?

    There’s a lot of confusing information out there for you to think about when you’re buying a mattress. But the Simba Earth mattresses are in a class of their own– with a unique blend of our signature tech with some of Nature’s best materials and a truly luxurious take on sleep.    

    They all feature a range of hand-tufted layers, including our innovative, sonically welded Quadcore™ base which helps facilitate a more efficient and complete recycling process. 

  • 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. 

    Our Hybrid® king size mattresses offer excellent support for all sleeping styles; the combination of our patented Aerocoil® micro springs with supportive foam is designed to help your body stay comfortably aligned however you sleep. 

    Recommended King Size Bed Mattress: Any of our Hybrid® King size mattresses 

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

    Being woken up by your partner’s movements is one of the most common sleep problems. 

    Our unique Aerocoil® springs in our Hybrid® mattresses are designed to offer tailored support to each partner, and to limit 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 budget allows, opt for the models with the highest spring count such as the Hybrid® Ultra mattress or the Hybrid® Luxe 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. The patented Aerocoil® springs we use in every Hybrid® mattress help push air gently through the top layers, while the Simbatex® foam offers fresher airflow than dense memory foam. As for our Earth range, they feature  natural mattress materials to help you stay fresh and comfortable all night long. 

    Recommended king size mattress: All our king size mattresses are designed for cooler sleep, but we recommend our Earth range king size mattresses to stay fresher naturally. 

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

    Waking up with aches and pains can be a sign of incorrect spinal alignment or poor support. We’re not medical professionals, so we can’t judge what’s right for your back. What we can say is that we’ve received huge amounts of positive feedback from people who say they’ve suffered from aches and pains, and our Simba mattresses have helped them to reach a great night’s sleep.

    Recommended king size mattress: the Hybrid® Luxe or Ultra. 

  • 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 Hybrid® Essential King Size Mattress, which offers our signature mattress technology at a comfortable price. For a little more you could opt for our ground-breaking Hybrid® Original mattress, which features a much higher spring count and more depth to enhance support and cushioning.

    Recommended King size mattress: the Hybrid® Essential or Hybrid® Original mattress.

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

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

    We offer free delivery on your king size mattress, even in sale periods. Most Simba mattresses will arrive vacuum packed and boxed, so it’s a lot easier to get up the stairs. Others – like our entire Earth range – are unboxed and flat, so they include VIP delivery to a room of your choice. 

    You have 200 nights 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.   

  • How long can I expect to keep my king size mattress?

    We’re confident all our Simba mattresses will go the distance, which is why we offer a 10-year guarantee on all new mattresses. Manufacturing faults are rare, but if you stumble across any, just let us know and we’ll replace it with a brand new one.

  • 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 they’re either recycled or refurbished by our trusted third partners. Not only is this process 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 parts where necessary, before a final inspection to receive a certified Simba guarantee.   

    For more information check our range of Refurbished Mattresses. 

  • Can my king size mattress be recycled?

    We don’t want any of our mattresses to end up in landfill, so all the king size mattresses for sale at Simba are suitable for recycling via our collection service or specialist providers; those returned in your 200-night trial (or under our 10-year guarantee) are refurbished, and any with too much wear and tear are recycled. Once your mattress reaches the end of its life, our site has a specialised Simba Mattress Recycling Service where you pay a small fee, and we come and collect it for you. Any brand, any size – no Simba purchase necessary.

    Find out more about our Mattress Recycling Service here.

  • How to care for and maintain your King size mattress

    You’ll be relieved to hear you don’t need to flip your Simba King size mattress over in the whole time you have it. We do, however recommend however that you rotate your new Hybrid® mattress 180° once a month for the first three months, then once every three months for the rest of its life. As for our king size Earth mattresses, once every six months after the first few months will do the trick, so your natural mattress fillings stay comfortable for longer. 

    To keep them fresh and clean, most 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. 

  • Want a new king size bed frame for your mattress?

    If you're going to treat yourself and buy a king size mattress, it makes sense to ensure you have a fantastic bed base to go with it. We have a range of bed frames to suit every need, from our clutter-clearing Ottoman bed bases to our beautifully simple Wooden beds. And because sleep is personal, you can choose your fabric, headboard design and desired storage on selected premium beds.

  • I'm looking for a medium firm king mattress

    There’s actually no universal industry system that compares a ‘firm mattress’ with a ‘medium-firm’ mattress. So we designed our Hybrid® king mattresses to offer supportive body alignment alongside soothing pressure relief, and here at Simba HQ we rate them as medium-firm.

Which Simba Hybrid® mattress is best for you?

Here's an introductory guide to our range. If you're not sure which mattress to go for; we have two different ones: the Hybrid® Range and the Earth range. We also have our own range of Simba certified Refurbished Mattresses, subject to availability.

  • Hybrid® Mattresses

    Award-winning mattresses, packed with ground-breaking tech for superb comfort and support. However you sleep, whatever your budget.

  • Earth Mattresses

    Heavenly comfort, sumptuous support. Designed and made in the UK with a luxurious blend of natural materials and our signature technical expertise.

Happy Sleepers

We rest better when we know your honest opinion of us. Check out reviews from Simba sleepers below.

WIN BACK THE COST OF YOUR FIRST ORDER

Subscribe to our newsletter, place your first order, and we’ll enter you into a monthly draw to win back the entire cost.

Please note the finance figures shown are for illustrative purposes only. Details of the actual figures will be available during the finance application process.