Best King Size Mattress – Reviews And Awards 2021 UK

How do you make sure that you buy the best king-size mattress for you? Well, first – whip out your measuring tape and if that showroom bed is 150 cm x 200 cm, then you have found a kingly specimen. We are here to help you with the rest.

The best mattress – regardless of size – must have enough benefits to give people a great night’s sleep. We handpicked the top mattresses for comfort, quality, their excellent awards and home trials, and we also included different types of beds (you will find both pocket sprung mattresses and memory foam delights on this list).

Please note that the price of each bed was correct at the time of writing. Ready to meet some of the greatest beds from the best-value mattress brands? Here they are.

Best King Size Mattress

1. The Lux Mattress By Brook And Wilde – Soft, Medium, Firm And Extra Firm (Price: £849)

The Lux Mattress by Brook And Wilde is one of two hybrid mattresses that are made by this company. We included both beds due to how versatile, comfortable, and plain wonderful they are.

Each bed is available in several sizes and has a pleasing spectrum of support levels – soft, medium, firm, and extra firm. But let’s begin with the mattress with the fewest layers. Disappointed? Don’t be. The Lux Mattress has a heavenly count of 6 layers.

Lux Mattress By Brook And Wilde

The Benefits Of This King-Size Mattress

Filled with memory foam, pocket springs, and cooling properties, Brook and Wilde mattresses offer support, luxurious comfort and a great night’s sleep. Here are all the layers and their benefits.

Layer 1: The first treat you can look forward to is a soft and sumptuous bed cover. But this is not the type of mattress wrap without a purpose. In fact, it has two duties. The durable cover breathes to make hot nights cooler and it also wraps around the entire king-size mattress to keep it clean and firm.

Layer 2: Memory foam layers in bigger beds must offer benefits to couples. One of the most important is the elimination of motion transfer. The Lux Mattress includes foam that prevents the tossing and turning of partners from disturbing their significant other. This layer of memory foam also has cooling properties and moulds to your body shape for tailor-made support.

Layer 3: To make sure that pressure points are no longer a problem, the designers added 2,000 pocket springs that move with you as you rest, turn over, or get in and out of your king-size mattress.

Layer 4: Regardless of body shape, most people need a correct spinal alignment when they sleep. Brook and Wilde’s mattresses contain a layer of memory foam that is thicker beneath the torso area to give extra support to the shoulders and the spine.

Layer 5: The mattress firmness and support also hails from the second layer of pocket springs. This layer numbers an extra 1,000 coils. They may be fewer than the first but they are bigger and offer sensitive pressure relief and motion elimination.

Layer 6: The best mattresses have a sturdy support base. This keeps the entire king-size mattress firm and in working order for years. It also offers additional solidity for spine health to reduce back pain.

How Long Is The Sleep Trial And Mattress Guarantee?

Brook and Wilde really wants their customers to find their dream bed. They go about this goal in two ways. First, you can enjoy a 100-night free sleep trial. But let’s say you take home the Lux Mattress and something about it is not quite right, then you get your second chance. Brook and Wilde will allow you (if you want) to exchange the Lux for their other mattress. If you decide to keep the Lux, the brand will give you a 10-year warranty.

  1. The terms and conditions of the guarantee.

We also found the longest sleep trials on the market today if you seriously want to test the mettle of a mattress.

Awards And Reviews

Brook and Wilde has the right to feel smug. Both of its mattresses have won awards on their own and together as a brand collection. In this section, we will look at what they won as a team and the prize given to the Lux Mattress. The latter won a Which? Best Buy award in 2019 and together, the Brook and Wilde mattresses were named as one of the best boxed bed brands on the market. This accolade was given to the mattresses by Real Homes. Brook and Wilde’s mattresses share a rating on Trustpilot and at the moment, the score is an excellent 4.3 out of 5 stars.

Are you interested in the brand? You can read our complete Brook and Wilde brand review for more information on price, deliveries, and special sales and deals.

2. The Elite Mattress By Brook and Wilde – Soft, Medium, Firm, and Extra Firm (Price: £1,199)

The Elite Mattress could be your new mattress if you loved the Lux but would not mind two extra layers of comfort. That is right. The Elite Mattress has 8 levels. Carefully designed with memory foam, pocket sprung elements, and protective features, one can expect only the best from this bed.

The mattress firmness is also variable, offering soft, medium, firm, and extra firm. Let’s see the highlights of this king-size mattress.

Elite Mattress By Brook And Wilde

The Benefits Of This King-Size Mattress

  • A great choice for those who love pocket sprung mattresses with memory foam.
  • The King-size mattress is suitable for any sleeping position and body shape.

Layer 1: This top cover is not available with the Lux. What makes it so special? It can be removed and washed. These traits offer more hygiene for those who need a clean sleeping surface to avoid allergens or just love the smell of laundered bedding. (Get our practical tips on how to clean a bed).

Layer 2: This is the king-size bed’s first protective feature. (Or second, because the cover also wraps around the mattress). But either way, this sheet is seriously out to make your king-size mattress last as long as it can. It prevents the top cover from snagging on the first sheet of memory foam and causing damage to both.

Layer 3: The best memory foam mattress features can be found in this layer. The foam regulates your temperature to stay cosy, regardless of the time of night or season. One can also expect pressure relief, support, comfort, and spinal alignment. The foam also circulates air throughout the entire king-size mattress to avoid overheating and unhygienic conditions.

Layer 4: The best pocket sprung mattress must have a decent amount of coils. This king-size bed has two layers. The first consists of 2,500 mini coils that support, comfort, and provide a weightless feeling of luxury so that you can sleep better, especially when you have aches and pains.

Layer 5: The Elite Mattress also contains the thickened memory foam that offers special spinal and shoulder support (you might remember this feature from the Lux Mattress).

Layer 6: The second layer of coils number 1,000 larger springs that help with mattress firmness (regardless if you chose soft, medium, or firm). They also help to make this the best mattress for sleepers who need this extra reactive comfort to ease conditions like arthritis and back pain.

Layer 7: The support base not only keeps the back supported and the other layers in working order. It was also specifically designed to protect the king-size mattress’s coils so that they can offer sleepers the abovementioned benefits for years.

Layer 8: Scary fact – a lot of mattress warranties refuse to reimburse a mattress that was damaged due to travelling over the edge of the bed frame. It is thus important to make sure that the mattress is securely fitted to the frame. The Elite has a special non-slip layer that ensures your king-size mattress stays put.

How Long Is The Sleep Trial And Mattress Guarantee?

It does not matter what size you pick. Or whether you pick soft, medium, or firm. All Brook and Wilde mattresses come with the same deals. You can test the brand’s mattresses at home for 100 nights. Just a quick reminder – if you do not like the Elite bed, then you can exchange it for the Lux and continue with the remainder of the sleep trial. Should you decide to keep either as your new king-size mattress, Brook and Wilde will cover it with a 10-year warranty.

  1. The terms and conditions of the guarantee.

Awards And Reviews

We already covered the team prize for the two mattresses and their combined rating at Trustpilot. But on its own, the Lux Mattress also won the seal of approval from the Good Housekeeping Institute in 2020 and when Good Homes Magazine wrapped up their review, it said that the Elite mattress was “One of the best mattresses we have ever tested.”

Are you interested in the brand? You can read our complete Brook and Wilde brand review for more information on price, deliveries, and special sales and deals.

3. The Emma Original By Emma – A Soft/Medium-Firm Mattress (Price: £609)

Are you looking for the top king-sized mattress? Then perhaps this will tickle your interest. The Emma Original Mattress by Emma is the UK’s most-awarded mattress and also its best-selling bed.

The soft/medium-firm mattress has plenty of treats to offer sleepers. Let’s see why this could be the right size mattress for you.

Original Emma Mattresses

The Benefits Of This King-Size Mattress

  • The king-size mattress is suitable for all body types and sleeping positions.
  • A great choice for sleepers who are not fans of pocket sprung mattresses. Here, you will find nothing but the comfiest foam.
  • There are 5 size options.
  • The king-size mattress is designed to support your shoulders, hips, and spine to ensure quality sleep that will leave you energized in the morning.
  • The foam has advanced zoning areas that support the entire body, giving sensitive cradling where you need it most.
  • The king-size mattress is excellent at pressure relief, providing comfort for aches and pains, and also to keep motion transfer between partners a thing of the past. All these benefits make the Emma Original a firm choice for couples who need undisturbed sleep due to different working hours or medical conditions.
  • Another great feature you can expect from this king-size mattress is its cooling properties. The foam is open-pored and great at circulating fresh air. This means that your mattress will stay at the best sleeping temperature while also keeping the inside of the bed fresh and hygienic.
  • The king-size mattress also fights humidity and moisture.
  • It also has a non-slip cover to protect your mattress from frame damage.
  • All Emma mattresses also spread a sleeper’s weight evenly, making it perfect for painful conditions like arthritis.

How Long Is The Sleep Trial And Mattress Guarantee?

Emma offers one of the best home trials to test mattresses at home. While not the longest free trial in the mattress industry, its 200-night trial is still an amazing offer. Let’s say that you like the price, firm support, and size. Once you decide to purchase, Emma will give you a 10-year guarantee.

  1. The terms and conditions of the home trial.
  2. The terms and conditions of the mattress guarantee.

Awards And Reviews

  • In 2020, Which? Best Buy said the Emma Original was “One of the highest-scoring mattresses we’ve tested in years”.
  • In 2020, Ideal Home also placed their seal of approval on the mattress.
  • Real Homes praised the Emma Original pressure point relief and luxurious mattress firmness.
  • T3 awarded its Platinum Award to the Original Emma mattress in 2020. The year before, in 2019, T3 also gave the Best Mattress Award to the Original mattress.
  • In 2019, the national newspaper, i News, tested Emma’s foam mattresses and gave the brand a Which? Best Buy recommendation.
  • In 2020, The Independent listed the mattress as the best choice for all sleeping positions and also for being the easiest to turn.
  • In 2020, The Good Housekeeping Institute approved the Emma mattress.
  • In 2020, The Mattress Guide tested the mattress. It earned a near-perfect score in all nine categories. TMG named it “The UK’s leading mattress.”
  • The mattress won the Best Mattress Overall prize in the BMUK Awards 2020.
  • In 2020, Expert Reviews named the Original Emma mattress as one of the best bed-in-a-box mattresses.
  • The Mattress Guide also crowned the bed as the Best Mattress Reviewed winner during the 2020 TMG Awards.

Are you interested in the brand? You can read our complete Emma brand review for more information about their mattresses, price list, and more.

4. The Fresh Deluxe Memory Foam Mattress By Dormeo – A Soft/Medium Firm Bed (Price: £359.99)

The Fresh Deluxe Foam Mattress by Dormeo is a special softie. The mattress is treated with precious metal and special stuff to live up to its name (you know, the “fresh” part). Okay, the Deluxe part too.The mattress has four size options and the tension level is graded as soft/medium. This is perfect for those who need support but extra plushness.

Memory Foam Mattresses

The Benefits Of This King-Size Mattress

  • The king-size mattress is stylish and has a quilted appearance.
  • The total depth is 20 cm.
  • The top cover of this king-size mattress is woven with silver thread. The precious metal is naturally anti-bacterial but it also effectively eliminate odours that most mattresses are prone to.
  • There are two layers of foam. They create the plush soft/medium-firm feel, make the mattress breathable, supportive and balanced for all types of sleepers.
  • It is delivered as a convenient boxed product that a single person can carry through doors and even up the stairs by themselves.
  • The foam will never dip or buckle. It was designed to remember its shape and to return to its original fullness once you get up and go about your day.
  • Are you also suffering from allergies? This king-size mattress was given special treatments to make it give allergens the boot. More specifically, it is anti-bacterial, anti-dust mite and anti-fungal.
  • The mattress is well-ventilated.
  • Partners can also sleep peacefully since there is no motion transfer.
  • The king-size mattress is also a great choice for those who need improved blood circulation as they sleep. Thanks to comfort and support, blood flow is easier and it helps to regenerate muscle and physical energy.
  • Maintenance is also easy. This king-size mattress does not need to be turned. You can simply rotate it once in a while on its base. The easy-grip handles make this task easy.
  • The foam is a high-quality product made in Tuscany, Italy.

How Long Is The Sleep Trial And Mattress Guarantee

Should a customer show interest in this soft/medium mattress, they can test it at home for 60 nights. Sure, Dormeo’s home trial is not the longest but some brands have no free trials. Two months should give you an idea of whether this king-size mattress is suitable for you. If the mattress makes you happy, then you can look forward to a good warranty. The mattress is covered with a 15-year guarantee.

  1. The terms and conditions of the home trial.
  2. The terms and conditions of the mattress warranty.

Awards And Reviews

The mattress has not yet won any awards. It is worth mentioning that Dormeo, as a brand, is the holder of several prestigious awards including the acclaimed aviation industry’s Crystal Cabin Award and several Which? Best Buy awards. That being said, the Fresh Deluxe Memory Foam Mattress has great ratings. On its product page over at Dormeo, 223 reviews gave it 4.5 out of 5 stars. Roughly 88 percent of consumers also said that they would recommend the mattress to others.

Are you interested in the brand? You can read our complete Dormeo brand review for more information.

5. The Aloe Vera Memory Foam Mattress By Dormeo – A Medium Firm Mattress (Price: £309.99)

The Aloe Vera Mattress is aptly named. The plush cover is infused with Aloe Vera extract. This plant has been known for thousands of years for its ability to strengthen the immune system and keeping the skin healthy (think of all the skin moisturizers and soothing creams and you’ll start to see how widely used Aloe Vera is). But for sleepers who like cleanliness, Aloe Vera is also naturally antibiotic, anti-microbial and antiseptic. Let’s see what other benefits you can expect.

Aloe Vera Memory Foam Mattress By Dormeo

The Benefits Of This King-Size Mattress

  • The mattress firmness is medium-firm. This is the perfect comfort level for most sleepers and also those who require both support and softness for conditions like arthritis, sore muscles, or painful back issues.
  • There are four size options.
  • It is also available in soft medium.
  • The king-size mattress is designed to aid blood circulation, muscle healing, and quality sleep to feel more rested and rejuvenated in the morning.
  • The foam gives tailor-made support to pressure points, reduce the feeling of movements between couples and it also remembers its shape (so no permanent dips will ruin your king-size mattress).
  • The mattress also circulates air to keep you cool and fresh during the summer and toasty during the colder months.
  • The Aloe Vera mattress is also treated to be anti-bacterial, anti-dust mite and anti-fungal. This makes it a good choice for allergy and asthma sufferers and those who care about mattress hygiene.
  • You also do not have to flip this king-size mattress over. You can simply use the handles provided to rotate it on its base as per the instructions.
  • Just like with all other Dormeo mattresses, this one is also made with the best Italian foam.

Are you looking for more beds with natural fillings? We have found and reviewed the best latex beds and wool beds. If you want natural fillings like alpaca fleece, silk, and horse hair, then you can also visit our complete Vispring brand review.

How Long Is The Sleep Trial And Mattress Guarantee?

The deal is pretty much identical to the previous king-size mattress we discussed from Dormeo. But here is a quick recap. It does not really matter what firmness you choose. Whether its soft medium or medium-firm, Dormeo allows customers to test a king-size at home for 60 nights. The guarantee is also 15 years long.

  1. The terms and conditions of the home trial.
  2. The terms and conditions of the mattress warranty.

Awards And Reviews

While the mattress has not won any awards yet, the reviews on its product page at Dormeo is looking positive. At the time of writing, only 13 customers have rated the mattress but the score is great – 4.8 out of 5 stars. Many commented on the firm feel that was also very comfortable to sleep on.

Are you interested in the brand? You can read our complete Dormeo brand review for more information.

6. The Mattress-Now Comfortable Mattress By Silentnight – A Soft/Medium Firm Mattress (Price: £189)

The Mattress-Now Comfortable Mattress by Silentnight is a perfect choice for couples who are looking for a budget-friendly king-size mattress.

The soft/medium-firm feel might not suit everyone but is great for sleepers who need a medium firmness that is more plush than usual. Is this the best king-sized wonder for you? Let’s see.

Mattress-Now Comfortable Mattress By Silent Night

The Benefits Of This King-Size Mattress

  • The size is 150 cm x 200 cm x 14 cm.
  • The high-density Miratex foam offers just the right level of firm support to remove pressure points, discomfort, and your partner’s tossing and turning.
  • The mattress has edge-to-edge support. You can enjoy the same soft/medium tension across the entire surface and the borders of the mattress are also dip-resistant.
  • The cover of this king-size mattress is soft and hypoallergenic.
  • The mattress is treated with Purotex, friendly probiotics that form a firm barrier between your mattress and allergens like dust mites, bacteria, and even moisture.
  • Do you love the idea of a boxed mattress (especially a big king-size)? Then this will make you happy – the Mattress Now will be delivered as a rolled-up mattress inside an easy-to-carry box.
  • The mattress also has a simple and yet stylish appearance.

How Long Is The Sleep Trial And Mattress Guarantee?

Silentnight also offers 60 nights to anyone who wants to test this mattress at home. While two months offer enough time to gauge for things like comfort and whether the mattress is firm enough, the guarantee might not please customers too much. Silentnight only covers this mattress for 3 years. This is one of the shortest guarantees but that does not seem to stop sales (otherwise our review section for this king-size mattress would be empty!).

  1. The terms and conditions of the home trial.
  2. The terms and conditions of the warranty.

Awards And Reviews

At the time of writing, the mattress has not yet won any awards. But it did get a lot of reviews from consumers. On its product page over at Silentnight, around 80 people have rated the mattress and currently it has a great score of 4 out of 5 stars.

Are you interested in the brand? You can read our complete Silentnight brand review to see their other beds and bedding.

7. The Nectar Memory Foam Mattress By Nectar – A Medium-Firm Mattress (Price: £669)

The Nectar Memory Foam Mattress by Nectar is the brand’s only mattress. It sells quite well thanks to its excellent quality, sumptuousness and support.

It also helps that Nectar has a habit of giving away free gifts! Let’s see if Nectar already has your perfect king-size mattress.

Memory Foam Mattress By Nectar Sleep

The Benefits Of This King-Size Mattress

  • The medium-firm feel is the most popular tension level. This makes the mattress a good choice for couples who prefer this firm level.
  • The mattress has a wonderful depth of 25 cm.
  • The cover is plush, quilt-like, and breathes to keep you cool and comfortable.
  • Several memory foam layers get rid of heat and moisture while also providing firm support and comfort for your whole body (and movements).
  • Speaking of movements, couples can also enjoy sleeping without being disturbed when their partner turns over.
  • The Nectar Mattress also has that all-important protective feature – the non-slip material that securely keeps the mattress on the frame and away from the frame’s edges.
  • It is well-ventilated for cooling and hygiene.
  • Offers great pressure relief and spinal alignment, making it a great choice for those with back problems.

How Long Is The Sleep Trial And Mattress Guarantee

We saved the best for last. Nectar is one of two brands who offer such long trials and warranties that no other company can match them. This is not insanity on Nectar’s part – that is how much it trusts the quality of its own product. Nectar truly believes that few customers will be disappointed enough to return their mattress after the free trial – which runs for a full year. You read that right. You get 365 nights to snooze on this mattress. If you love it, then the brand will give you a fantastic lifetime guarantee.

  1. The terms and conditions of the home trial.
  2. The terms and conditions of the warranty.

Awards And Reviews

The Nectar mattress has won several awards. In 2019, Real Homes placed its approval seal on the mattress. In 2020, it also earned the seal of approval from The Good Housekeeping Institute and The Sleep Foundation also named it as the Best Overall Mattress of the year. Just to name a few. There are also over 7,000 reviews on Trustpilot. The mattress has an excellent rating of 4.6 out of 5 stars.

Are you interested in the brand? You can read our complete Nectar brand review to see the company’s own awards, bedding, and free gifts.

Two Free Guides To Find The Best King-Size Mattress

Great, you found the perfect size mattress to spoil yourself at night. But which king-size mattress is the right one for you? There is a dizzying array of memory foam, pocket sprung, and even hybrids that come in this size.

To help you to find the right mattress that will give you rest, great sleep, and energy in the morning, we wrote a practical guide on how to choose a bed. While it is not specific to choosing a king-size, it will definitely make things easier so that you know exactly what to look and how to make a purchase that will keep you satisfied for years. In case you are still undecided about the size mattress, then you can also look at our guide that explains everything you need to know about the different mattress sizes.

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About the Author Tom

My journey into the world of sleep came about through living in several properties over my lifetime and always seeming to have the worst luck with neighbors. All but one have been extremely noisy and very inconsiderate. What this made me realize early on, was that the little sleep my neighbors allowed me to get needed to be of great quality. So I started to learn all about sleep, and what helps people get the best quality sleep possible.