King Size Mattresses

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.

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.

Every Simba Hybrid® King size mattress is packed with our exclusive, problem-solving 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 cushioning Simbatex® foam.

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 alloy 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.

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.

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 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.

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.

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.

We offer free delivery on your king size mattress, even in sale periods. It arrives vacuum packed and boxes for a more eco-efficient delivery (and it’s a lot easier to get up the stairs).

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.  

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 to receive a certified Simba guarantee.  

For more information check our range of Mattresses.

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.

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