Your Cart

Your cart is currently empty.

Shop Now
Protect your products
5-Year Accident Cover £22

We know how important it is to keep your new sleep products safe, but we also know accidents can happen. With Accident Cover, we’ll help you keep your bed and/or mattress in their very best condition.

We are paid by the insurer through commission, which is included in the premium you pay.

So what is covered?
  • Food and drink spills such as coffee or red wine
  • Ink marks from biros, permanent markers etc
  • Make-up and cosmetic stains
  • Accidental damage caused by pets
  • Burns from heated appliances such as straighteners or curlers
  • Rips and tears
  • Damage causing breakage to the frame
What is not insured?
  • Deliberate damage caused by you or any person
  • General wear and tear
  • Accumulation of damage or staining
  • Any structural or manufacturing defects
  • Accidental staining or damage caused by the use of incorrect cleaning products
Subtotal
Pay Now: , sale price: £0.00 OR Payments from: £0.00 per month
Checkout

Goes like a dream

WHY NOT TRY OUR AWARD-WINNING SLEEP TECH?

  • Save 26% Key worker, Student, Youth, Education, Carer & Charity

King Size Mattresses

Filter & Sort

Sort by:


Range:

Price:

Comfort fillings:
We’ve specially engineered our comfort fillings to keep you feeling supported, cool and cushioned; the more layers you have, the more transformative and luxurious your sleep will feel.

Refurbished:

Hybrid® Ultra Mattress
Experience Perfection
The Telegraph
  • Max spring count & extra comfort layers
  • 11 layers | 34 cm deep | Up to 7300 springs
  • Plush
£2,599 Or £69.85 monthly*
Hybrid® Luxe Mattress
Plush & luxurious
Good HouseKeeping
  • Bamboo/Wool & 3 microspring layers
  • 9 layers | 31cm deep | Up to 5700 springs
  • Medium firm/plush
£1,899 Or £51.04 monthly*
Hybrid® Pro Mattress
Double support
Product of the Year
  • Wool comfort layer, extra spring layer
  • 8 layers | 28cm deep |  Up to 4800 springs
  • Medium firm
£1,399 Or £37.60 monthly*
The rest you deserve, our thank you to community heroes.
26% off everything

The rest you deserve, our thank you to community heroes.

For key workers, teachers, carers, military, disabled, students, youths, charity workers
Hybrid® Mattress
Original Hybrid® design
Good HouseKeeping
  • 9 support zones
  • 5 layers | 25cm deep | Up to 1900 springs
  • Medium firm
£999 Or £26.85 monthly*
Hybrid® Essential Mattress
Most budget-friendly
The Telegraph
  • 5 support zones
  • 4 layers | 20cm deep | Up to 1000 springs
  • Medium firm
£799 Or £21.47 monthly*
Natural Hybrid® Apex Mattress
Peak natural opulence
Good Housekeeping
  • Cashgora, silk & wool
  • 11 layers | 32 cm deep | Up to 6,700 springs
  • Plush
£2,399 Or £64.48 monthly*
Natural Hybrid® Escape Mattress
Boutique hotel feel
 Good Housekeeping
  • Extra British wool comfort layers
  • 10 layers | 30 cm deep |  Up to 4,800 springs
  • Medium firm /plush
£1,899 Or £51.04 monthly*
Natural Hybrid® Source Mattress
Wool & spring bliss
Good Housekeeping
  • British wool comfort layers
  • 8 layers | 28 cm deep | Up to 2,900 springs
  • Medium firm
£1,399 Or £37.60 monthly*
Hybrid® Ultra Mattress, Refurbished
Experience Perfection
Refurbished
Refurbished badge
  • Max spring count & extra comfort layers
  • 11 layers | 34 cm deep | Up to 7300 springs
  • Plush
£1,699 Or £45.66 monthly*
Hybrid® Luxe Mattress, Refurbished
Plush & luxurious
Refurbished
Refurbished badge
  • Bamboo/ Wool & 3 microspring layers
  • 9 layers | 31cm deep | Up to 5700 springs
  • Medium firm/plush
£1,049 Or £28.19 monthly*

Need help choosing a mattress?

Try Our Mattress Quiz
Hybrid® Pro Mattress, Refurbished
Double support
Refurbished
Refurbished badge
  • Wool comfort layer, extra spring layer
  • 8 layers | 28cm deep |  Up to 4800 springs
  • Medium firm
£799 Or £21.47 monthly*
Hybrid® Mattress, Refurbished
Original Hybrid® design
Refurbished
Refurbished badge
  • 9 support zones
  • 5 layers | 25cm deep | Up to 1900 springs
  • Medium firm
£599 Or £16.09 monthly*
Hybrid® Essential Mattress, Refurbished
Most budget-friendly
Refurbished
Refurbished badge
  • 5 support zones
  • 4 layers | 20cm deep | Up to 1000 springs
  • Medium firm
£549 Or £14.75 monthly*
Natural Hybrid® Source Mattress, Refurbished
Wool & spring bliss
Refurbished
Refurbished badge
  •  British wool comfort layers
  • 8 layers | 28 cm deep | Up to 2,900 springs
  • Medium firm
£549 Or £14.75 monthly*
Out of Stock
Natural Hybrid® Escape, Refurbished
Boutique hotel feel
Refurbished
Refurbished badge
  • Extra British wool comfort layers
  • 10 layers | 30 cm deep |  Up to 4,800 springs
  • Medium firm /plush
£1,149 Or £30.88 monthly*
Out of Stock
Natural Hybrid® Apex, Refurbished
Peak natural opulence
Refurbished
Refurbished badge
  • Cashgora, silk & wool
  • 11 layers | 32 cm deep | Up to 6,700 springs
  • Plush
£1,449 Or £38.94 monthly*
Premium Zoned Mattress
Full body comfort
Clearance
  • Simbatex® foam cushioning
  • 3 Layers | 19cm deep
  • 7 support zones
£279 Or £7.49 monthly*
Out of Stock
Comfort Zoned Mattress
Support made simple
Clearance
  • Simbatex® foam cushioning
  • 3 Layers | 19cm deep
  • Multiple support zones
£234 Or £19.50 monthly*
Out of Stock
Hybrid® Inter Mattress, Refurbished
Exceptional Value
Refurbished
Refurbished badge
  • Hybrid® tech, clearance price
  • 4 Layers | 23cm Depth | Up to 1500 springs
  • 7 support zones
£449 Or £12.06 monthly*
Out of Stock

Discover the Different Types of Simba King Size Mattresses

At Simba, we have two different categories of king-size mattresses for sale - Hybrid® and Natural Hybrid®. To make finding the right Simba King mattress easier, in the sections below, we’ll go over each type in more detail, including what makes them unique and what you can expect in terms of feel and performance.

Hybrid® King Size Mattresses

Our Hybrid® range is where cutting-edge sleep technology meets everyday comfort. In this range of Simba mattresses, you’ll come across five different models, including Essential, Hybrid®, Pro, Luxe, and Ultra.

Each type of Hybrid® king mattress is engineered with a specific type of sleeper in mind. For example, our Essential is designed for those who want reliable support without the extra fuss at an accessible price point, while our Ultra represents the pinnacle of our sleep technology, built for people who want absolutely nothing left to chance when it comes to the quality of their sleep.

Natural Hybrid® King Size Mattresses

Our Natural Hybrid® range takes everything our customers love about our sleep technology and combines it with the best materials that nature has to offer. The mattresses that you’ll find as part of our Natural Hybrid® range include Source, Escape, and Apex.

They’re all built on the same foundation of our Aerocoil® spring system, but each one layers in a unique combination of sustainably sourced materials, including certified British wool, natural latex, and organic cotton. The result is a world-class sleep experience that’s as kind to the environment as it is to your body.

What to Consider When Buying a Simba King Size Mattress

To make sure you buy the right Simba king-size mattress, there are a number of factors we’d recommend you consider. They include:

Your sleeping position

How you sleep at night is one of the most important factors in choosing the right mattress. If you tend to sleep on your side, you’ll generally find softer mattresses more comfortable. If you prefer sleeping on your back and/or stomach, a firmer feel would be the more suitable option, as it’ll provide additional support for your spine.

Your body weight

Your body weight will have a direct impact on how your mattress feels and how much support it provides over time. If we use a softer mattress as an example, a lighter sleeper might find the mattress to be comfortable, while a heavier sleeper will experience that sinking feeling and a lack of support. So, carefully consider your body weight and choose a mattress that you personally find comfortable.

Your temperature preferences

If you tend to overheat at night, the materials your mattress is made from will make a big difference. For warm sleepers, we recommend mattresses made from breathable materials. Some of the Simba mattresses that are made with warm sleepers in mind include Escape and Apex (they’re from our Natural Hybrid® range).

Whether you share the bed

Although a king-size mattress offers plenty of room for two people, if you’re going to be sharing your bed with another person, there are some considerations that you need to take into account. To give you an example, if you or your partner tend to move frequently at night, it’s worth choosing a mattress that minimises motion transfer, as it’ll prevent movement on one side of the bed from disturbing the other.

Your preferred firmness level

Not all mattresses are made the same. Some king-size mattresses are designed to feel firmer and more supportive, while others are built with softer and more cushioned layers that create that sink-like feel. So, carefully consider your personal preferences, and choose a mattress that offers the exact level of firmness that you’re looking for.

Why Buy a King Size Mattress From Simba?

To design and develop the king-size mattresses that you can buy today, our expert sleep engineers have used the data of 10+ million body profiles. The result after 20+ years of research and innovation is eight unique mattresses designed to suit every sleep style and body type. Other reasons why you should buy a king-size mattress from Simba include:

  • We offer a 200-night free trial on all our mattresses
  • We can deliver your king mattress completely for free
  • All our king mattresses come with a 10-year guarantee
  • We offer a number of flexible finance options
  • We’re the most five star rate mattress brand in the world*
  • We’ve won over 100 industry awards

As a company that is proudly British, we also design all our mattresses here in the UK, creating local jobs wherever we can.

  • What size is a king size mattress?

    Standard UK king-size mattresses measure 150cm (W) x 200cm (L). As for the height, there is no standard size, and it’ll vary depending on the specific mattress you choose. To give you an example, at Simba, our king-size mattresses range in depth from 20cm for the Essential all the way up to 34cm for the Ultra.

  • What type of king size mattress is best for me?

    The best type of king-size mattress for you will depend on several factors, including your preferred sleeping position, body weight, whether you’re a warm sleeper, and whether you’re going to share the mattress with anyone else.

    At Simba, we have eight different types of king-size mattresses that you can choose from. So, make sure to go through each one individually and choose the one that best suits your specific needs.

  • What bed frame works with a king size mattress?

    If you’re thinking of buying a king-size mattress, you’ll need to buy a king-size bed frame. That way, you can be sure that your mattress will fit perfectly and be properly supported. To prevent yourself from buying the wrong size bed frame, always check the product description and make sure it’s specifically designed to fit a king-size mattress measuring 150cm (L) x 200cm (L).

  • Can I try a Simba King Size Mattress before buying?

    Yes, you can try a Simba king size mattress before you buy it. Our mattresses are available in the showrooms of Bensons for Beds, Barker and Stonehouse, and John Lewis throughout the United Kingdom. To find the nearest showroom to you, use the store locator tool on our website.

    If you don’t happen to live near a showroom, don’t worry. All our king-size mattresses come with a 200-night trial. This trial allows you to try your Simba mattress for 200 nights completely risk-free. That way, in the rare case that you don’t happen to love your Simba mattress, you can let us know, we’ll come to collect the mattress, and issue you a full refund.

  • Is a king mattress worth upgrading from a double?

    If you are currently sleeping on a double mattress, upgrading to a 5ft mattress will make a world of difference. The additional 15cm of width and 10cm of length might not seem like a whole lot, but once you’ve slept on a king-sized mattress, it’s very hard to go back.

  • How long does a king mattress last?

    A good quality king-size mattress should last anywhere between seven and ten years - though this can vary depending on the materials it’s made from, how well it’s cared for, and how frequently it’s used.

    At Simba, we’re big on durability. That’s why we make no compromise when it comes to the quality of the materials we use, the rigour of our testing process, and the engineering that goes into every mattress we make. We’re so confident in the quality of our mattresses that they all come with an industry-leading 10-year guarantee.

WIN BACK THE COST OF YOUR FIRST ORDER

Subscribe to our newsletter, order your first mattress online, 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. Subject to affordability, age & status, minimum spend applies.