Free min 5 year guarantee
On beds, mattresses & furniture
280,000+ reviews
0% APR interest free credit*
On orders over £500

King Size Memory Foam Mattress Collection

On the lookout for a king size bed? Memory foam is one of the most popular mattress material around. A king memory foam mattress is great for joint or back pain thanks to the pressure relieving capabilities of memory foam. Curious about whether a king size foam mattress is the right option for you? Scroll down to learn more. Otherwise, explore our king size memory foam mattress collection here.

Shop Memory Foam Mattresses by Size

A king size memory foam mattress protector is a wise investment for anyone wanting to get the most of their bed and mattress. Mattress protectors come loads of benefits. The main ones include:

  • Protection against stains from accidental spills and everyday use: King memory foam mattress protectors stop stains from fluids, skin, and hair leeching onto the mattress itself.

  • Protection from allergens: A memory foam mattress cover in king size provides an extra layer of protection that can help prevent allergens building up in your mattress. This is a bedtime essential for anyone suffering with asthma, eczema, or dust mite allergies.

  • Protects your warranty: Using a mattress protector from day one helps you to avoid voiding your mattress warranty, ultimately protecting the longevity of your investment.

  • Improves the lifespan of your mattress: Mattress protectors actually help your mattress last longer. Keeping it clean and free of stains ultimately slows the time it takes for bacteria to build up in your mattress.

A king size mattress made from memory foam is 150cm x 200cm (or 5ft x 6ft6”). Comparing this to a double memory foam mattress, a king size gives you an additional 15cm of mattress width and 10cm more in mattress length.

A king bed with a memory foam mattress is designed to sleep two adults comfortably all night long. As it provides enough space for two people to find their ideal sleeping position, or plenty of room for an adult sleeping solo to spread out as they please, a king size bed mattress made from memory foam is the king of the master bedroom. But that doesn’t mean that this bed and mattress size is only suited to master bedrooms.

If you’re lucky enough to have a generously sized spare bedroom in your home, a king bed and foam mattress could offer a really comfy retreat for those occasional overnight guests to retreat to too.

Struggling to decide between a king size and a super king mattress? Our guide compares the two sizes to help you decide which is option is the best fit for you.

Generally, thanks to their generous size, we’d recommend a king size bed and mattress to those sharing a bed. This is because, a king size bed provides ample space for two people to sleep well. That said, a king size bed can also work for those sleeping alone, providing plenty of space to get a great night’s sleep.

As for memory foam mattresses, we’d recommend these for almost any sleeper. Memory foam is fast becoming a firm favourite mattress material across the globe, and that isn’t without good reason. Memory foam has proven itself a great choice for:

  • Back pain sufferers: Memory foam can help keep the spine aligned and reduce the likelihood of waking with aches and pains.

  • People with joint pain: Memory foam also has great pressure-relieving qualities and is comfortable on joints like the hips and shoulders.

  • Stomach sleepers: Mattresses made from memory foam can provide the extra support needed for stomach sleepers.

  • Couples: Memory foam minimises motion transfer and can reduce the number of disturbances during the night caused by restless sleepers.

  • People with heavier body types: Memory foam is great at delivering the added support heavier people need when they sleep.

Hoping to find a cheap king size memory foam mattress? You'll want to check out our dedicated mattress sale section. This is where you’ll find all of our cheap memory foam mattresses in king size – or any other mattress size for that matter. Alternatively, you could reorder the listings on this page by Price: Low to High. This will give you instant access to our cheapest king size memory foam mattresses.

And remember, at Bensons purchasing a cheap memory foam mattress in king size doesn’t mean compromising on quality. All of our products have been developed to ensure that everyone can find the right mattress for their own particular wants, needs, and preferences at a price point that’s right for them.

A king size mattress featuring pocket sprung memory foam is actually a hybrid mattress. Hybrid mattresses encompass a blend of two different mattress materials within a single mattress. Usually, this is a mix of pocket springs and either latex or memory foam.

A spring memory foam mattress in king size gives sleepers a more responsive sleep surface that is then topped off with a layer of memory foam. The role of this memory foam layer is to provide tailored comfort, additional support and cushion those pressure points. If you fancy investing in a mattress that ticks every box, our hybrid mattresses could be more in line with what you want. In our king size spring and memory foam mattresses collection, you'll find some innovative designs from the likes of eve, Tempur and our in-house brand, Slumberland too.

Once you’ve decided that a king size bed foam mattress is what you're after, thinking about mattress firmness comes next. To make things a little easier to understand, we’ve created a mattress firmness guide. This can be your go-to when you're trying to work out which king size foam bed mattress firmness would be a good fit for your needs.

At Bensons, we try to cater to all sleep needs. With this in mind, we have king foam mattress designs in all comfort ratings starting a soft and climbing right up to extra firm. A firm foam mattress in king size is a great option for anyone who regularly wakes with aches and pains in the morning. It's an equally good option for those craving tailored comfort or wanting to reduce the amount of motion transfer that is disrupting their sleep on a nightly basis too.

If you’re on a mission to find a firm foam mattress in the UK, stick with Bensons. You can even try out king memory mattresses before you buy at your local Bensons for Beds showroom.

A king foam mattress is usually one that's made up of different layers of foam. Each of these foam layers has a different job to do and thus is created in varying densities. True memory foam mattresses are made up entirely of memory foam. And each one will differ slightly to the next.

Modern memory foam mattresses are now designed to help you regulate your body temperature as you sleep.

Firm foam mattresses have been designed to properly support heavy sleepers and anyone suffering with back or joint pain.

Some king size memory foam mattresses are actually soft enough to deliver a level of personalised comfort that can cradle your little ones as they drift off to dreamland too.

For more information on the individual mattress specifications, check out the product descriptions on the product pages.

You might also like