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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
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Pay Now: , sale price: £0.00 OR Payments from: £0.00 per month
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WHY NOT TRY OUR AWARD-WINNING SLEEP TECH?

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Super King Size Mattress Toppers

A mattress topper is the best and most cost-effective way to give your current super king-size mattress a boost in comfort. Whether you find your current mattress too firm, lacking the support you need, or not offering adequate airflow and leaving you overheating at night, a super king-size mattress topper from Simba can transform your sleep surface overnight.

Each of our super king size mattress toppers is designed to offer enhanced support, comfort, and airflow. They are all built using the same level of precision and award-winning sleep tech found across our infamous range of mattresses. Get your super king-size mattress topper from Simba today and enjoy a 200-night trial at home and a free next-day delivery.

Hybrid® Mattress Topper

Ultimate Sleep Upgrade

Hybrid® Mattress Topper

  • 4 Layers

  • 2500 Springs

  • 6.5cm Depth

Super King £499
Or £13.41 monthly*
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Hybrid® Essential Mattress Topper
  • 4 Layers

  • 1500 Springs

  • 6.5cm Depth

Super King £399
Or £10.72 monthly*
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Cool Foam Mattress Topper
  • 3 Layers

  • CertiPUR® foam

  • 6.5cm Depth

Super King £299
Or £8.03 monthly*
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Hybrid® Mattress Topper  Refurbished refurbished
  • 4 Layers

  • 2500 Springs

  • 6.5cm Depth


  • 100% tested, sanitised & certified by Simba

Super King £289
Or £7.76 monthly*
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Hybrid® Essential Mattress Topper  Refurbished refurbished
  • 4 Layers

  • 1500 Springs

  • 6.5cm Depth


  • 100% tested, sanitised & certified by Simba

Super King £219
Or £18.25 monthly*
Sold out

Benefits of Using a Super King Mattress Topper by Simba

A quality super king mattress topper can make an immediate difference to the way you sleep at a fraction of the cost of replacing your mattress entirely. If you choose to buy a Simba super king mattress topper, here are some of the benefits that you can expect:

  • Enjoy targeted support exactly where you need it, thanks to our Aerocoil® microsprings
  • Sleep in cooler comfort at night thanks to our patented Simbatex® foam
  • Wake up free from pressure points as our foam contours to the shape of your body
  • Each topper features four elastic fixing straps to keep it securely in place
  • Our toppers are made with the same award-winning sleep tech that’s in our mattresses

In addition to the benefits above, if you choose to buy a super king-size topper from Simba, you can try it out for 200 nights in the comfort of your own home, completely risk-free. And if you decide to keep it, for extra peace of mind, you’ll get an industry-leading 10-year guarantee.

Simbatex vs Memory Foam Toppers

To help you choose the right super king mattress topper, we’d like to help you get a better understanding of what both our patented Simbatex® foam and traditional memory foam have to offer - and more importantly, where they differ.

Memory foam is used in the large majority of mattress toppers today. It is well known for its pressure-relieving properties and ability to contour closely to your body as you sleep. However, it is also notorious for trapping heat, which can affect your quality of sleep at night, especially if you’re a warm sleeper. It can also feel quite slow to respond when you change position, which some sleepers find quite restrictive.

Simbatex® foam, on the other hand, has been specifically engineered to address these shortcomings. It offers the same body-contouring comfort and pressure relief, but with five times more airflow. It is also more responsive and can adapt quickly to your movements throughout the night.

For sleepers looking for an upgrade in their quality of sleep, a Simbatex® foam topper is the most logical choice, and it’s the reason why we use it across our entire range of super king toppers.

Choosing the Right Thickness

While all super king size mattress toppers are the same width and length, the thickness can vary quite significantly from one topper to the next - and it’s a detail that is worth paying very close attention to before buying.

If the super king bed topper you buy is too thin, you may not notice much of a difference. If it’s too thick, the topper can affect the fit of your current bedding and mask the very qualities that make your mattress worth keeping in the first place.

At Simba, we have found that 6.5cm is the ideal thickness for a super king-size mattress topper. It is deep enough to make a genuine difference that you can feel from the very first night, while still allowing the underlying benefits of your super king mattress to shine through.

  • What size is a super king mattress topper?

    A super king-size mattress topper measures 180cm (W) x 200cm (L). When it comes to thickness or depth, it can vary quite significantly between the different models. At Simba, every super king topper is 6.5cm deep. This is a thickness we’ve arrived at through years of research and testing, and one that we believe delivers the best possible balance of comfort, support, and practicality.

  • How thick should a mattress topper be?

    The ideal thickness of a mattress topper is the one that will make a meaningful difference to your comfort without working against your mattress or affecting the fit of your bedding. At Simba, we have found that the perfect depth for mattress toppers is 6.5cm.

    This level of depth gives us enough room to pack in all of the tech and materials needed to deliver a genuinely transformative sleep experience without making your bed feel disproportionately high or causing your fitted sheets to strain at the corners over time.

  • What are the disadvantages of mattress toppers?

    There are very few drawbacks to using a mattress topper. If we had to point out some, one disadvantage would be that a mattress topper can only do so much to improve your quality of sleep if your mattress is worn out quite significantly or no longer structurally sound.

    Another drawback would be that if you choose to use a topper, the overall depth of your sleep surface will increase, which may affect the fit of your current bedding.

  • Which mattress topper is best in the UK?

    There is no single “best” mattress topper in the UK. The best mattress topper for you will be the one that best matches your specific sleep needs and the shortcomings of your current mattress. If support and cooling are your priorities, our Hybrid® Mattress Topper would be your best option. If you’re after a more budget-friendly option that doesn’t compromise on quality, we’d recommend our Cool Foam Mattress Topper.

  • Can I put a super king topper on any mattress?

    No, you can’t. A super king topper is specifically sized to fit a standard UK super king mattress, which measures 180cm (W) x 200cm (L). If your mattress matches these dimensions, then a super king topper will fit correctly.

  • How do I wash a super king mattress topper?

    If you have a Simba 6ft mattress topper, washing it is very easy. Start by unzipping the white sleep cover (only the top half), then pop it in the washing machine on a 40°C spin (maximum). You can then air-dry it or tumble-dry it on a low setting.

Happy Sleepers

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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.