5 Best King Size Mattresses in 2020

Last updated May 28, 2020 Read 19 min
Written by: Alex Savy

So, the time for a King mattress has finally come!

Maybe you’ve moved into a bigger house or found that a Queen bed is not wide enough for you and your partner, who loves to sleep in a starfish position.

Whatever your motives are, you definitely want your new mattress to be perfect. And that’s where I come in with my reviews of 5 best King mattresses.

There’s a bonus below, too: a comprehensive buying guide that will help you make the right choice.

A Quick Preview

Best for Edge Support

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Cool Bliss by Plushbeds
Best for Pressure Relief

Cool Bliss by Plushbeds
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Nolah 12
Best for Adjustable Feel

Nolah 12
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Best Eco-Friendly Option

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Best Under $1,000

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Our Reviews of 5 Best King Mattresses

Best for Edge Support - Dreamcloud

Dreamcloud Mattress

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  • medium firmness, works for most sleepers;
  • great edge support;
  • temperature-neutral design.

The Dreamcloud opens my selection of the best King size mattresses. This hybrid bed features an optimal level of firmness for almost any sleeper — medium. Along with that, the mattress has incredible edge support, so if you love snoozing closer to the side, this should be a perfect pick for you.

So, the edge support is ensured by a layer of individually wrapped coils, which also serves as the core supportive layer. Pocketed coils offer targeted contouring and remain sturdy and uniform no matter which sleeping position you choose.

If you’re concerned that a mattress will feel firm due to coils, don’t be. It’s actually pretty cushioning thanks to a pillow-top and two layers of soft, cradling foam underneath. These layers gently balance the rigidity of coils and offer you a soft hug and pressure relief.

Also, the hybrid construction means better airflow. The Dreamcloud sleeps cool, even though you may sink deeper into its comfort layers. The coil block promotes proper air circulation between the layers, allowing your body heat to dissipate during the night.

I really enjoyed sleeping on this mattress. It’s pretty cradling in all positions and offers you a uniform sleeping surface with strong edges.

Best for Pressure Relief - Cool Bliss by Plushbeds


Cool Bliss by Plushbeds

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  • awesome contouring and pressure relief;
  • doesn’t make you sleep hot;
  • great motion absorption.

Memory foam beds are unbeatable when it comes to pressure relief and relaxation. The Cool Bliss is no exception: this mattress feels like a cloud and hugs your body in any sleeping position, thereby ensuring heavenly sleep. I think this is enough to put it in my review of the best King size mattresses.

Thanks to the foam construction, this mattress will not only adjust to your body curves and keep the spine aligned but also absorb sharp movements you or your partner might make during the night. Since King beds are typically an investment for couples, good motion absorption will definitely be a plus, especially if one of the partners is a restless sleeper.

The mattress has a medium feel, which will work great for solid side and back sleepers or those who switch between these two positions. 

Along with that, the Cool Bliss, as the name implies, sleeps cool and excels at withdrawing your body heat. Gel-infused memory foam, natural latex, and convoluted foam are responsible for that, and I’m impressed with how great this trio works!
So, if you need a mattress with a pronounced pressure-relieving effect that won’t drown you in your own sweat, do not hesitate to purchase the Cool Bliss.

Best for Adjustable Feel - Nolah 12”

Nolah 12

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  • dual-sided design;
  • high-grade and durable materials;
  • doesn’t limit your movements.

Another highly rated King bed on my list is by Nolah. This mattress can be your lifesaver if you haven’t determined what firmness level you need. The Nolah offers you a dual-sided design with a firm and a soft side, so you can try both and choose the one that fits your sleeping style better.

The construction of the mattress seems pretty durable and sturdy. All the layers are made of foam, which is known for its shock-absorbing properties and a decent hug.

Moreover, the company uses its patented materials to make pressure-relieving effects even more pronounced. The Airfoam feels bouncier than traditional viscoelastic foam, but at the same time, it molds really closely to your body shape and can alleviate any stiffness.

Also, the Airfoam has an open-cell structure, which means that it traps less heat than the standard foam. I’ve tested both sides of the mattress and they sleep equally cool, except that the firm side has more of a floating feel.
So, if you’re searching for a new bed but have no idea what level of firmness will work for you, choose the Nolah. You can easily tailor this mattress to your needs to get the best comfort in your preferred sleeping position.

Best Eco-Friendly Option - AvocadoAvocado

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  • made of natural and renewable materials;
  • comes in two firmness options;
  • incredible support and durability.

Now, let’s talk about options for eco-enthusiasts. While many mattress companies on the market are trying to reduce their ecological footprint, there are only few who have this in their focus. Avocado is one of them. They have built a completely eco-friendly bed that can offer you durability and an amazing level of support, which both are reasonable grounds for putting the Avocado in my review of the best King mattresses.

The mattress uses renewable Dunlop latex as one of the materials, so you can expect good contouring and quick response. The latter is important if you don’t like to feel like you’re trapped in your mattress.

The supportive core of the Avocado is a layer of upcycled steel coils. This results in impressive edge support and resistance to sagging. Also, the coils ensure uniform support for your spine and even weight distribution.

Now, thanks to the hybrid construction and natural materials, you will get a refreshing sleeping experience in any position. The Avocado mattress is really breathable and can keep you cool and comfortable even if you used to struggle with chronic hot sleeping before.

It’s worth mentioning that you can go for the Standard option with a firm feel or choose a model with an additional Dunlop latex pillow-top for more pronounced cradling and softer feel.

I believe that the Avocado will make a great purchase for anyone looking for a cool and hypoallergenic mattress made of natural materials. There are more affordable options on the market, but if you’re willing to invest a bit more, you will get a bed that will serve you for years.

Best Under $1,000 - NectarNectar

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Click on the button below to check price and go shopping

Check current price Read our detailed review Shop Now on NectarSleep.com

Click on the button below to check price and go shopping

Check current price Read our detailed review Shop Now on NectarSleep.com


  • great value for money;
  • decent spine support;
  • low motion response.

Finding an affordable King bed might be really hard sometimes, as this size is typically the most expensive. That’s why I’ve included the Nectar in my review of the best King size mattresses. 

This is a memory foam mattress with a medium feel, so it could make a great pick for side and back sleepers. Also, memory foam can absorb motion very well, which is a plus for couples or restless sleepers.

Those who suffer from different kinds of pain will also benefit from the Nectar. The layer of gel-infused memory foam offers a great amount of contouring without trapping too much heat. So, you can expect a refreshing sleep without tension and stiffness.

Speaking of edge support, the Nectar has surprisingly sturdy edges and offers a uniform surface. This might be an advantage if you share a bed with someone or just love sleeping closer to the edge.

I can easily recommend the Nectar as an affordable mattress that is no worse than more expensive brands. It can satisfy most types of sleepers, offering a cool and peaceful slumber.

How Did King Beds Appear on the Market?

How Did King Beds Appear on the Market

Before we dive into details, let me allocate one paragraph of my King mattress review to a brief historical reference on how King beds actually appeared.

Because it’s quite interesting. 

Until the late 1950s, there were two most common bed sizes on the market: Twin and Full. The Hollywood shows and movies of that era projected strict views on intimate relationships, which dictated that it was normal for married couples to sleep in separate beds.

Ironically, a couple of years later, the same Hollywood shows and movies that portrayed the life of the rich changed the game completely.

The image of a luxurious bedroom with a huge bed tucked with silk sheets slowly transferred from the screens to the minds of regular users. This resulted in increased demand for larger beds, with the following introduction of Queen and King-sized beds to the market. The companies that pioneered in making these sizes were Sealy and Simmons (the latter also introduced the California King mattress a couple of years later).

“Fun fact: Some historians suggest that the very first King bed was invented around the 1890s and was enormously huge compared to the modern King mattresses. It could easily accommodate up to 15 people. Imagine the size of the room you’d need to fit this bed!”

Benefits of Having a King-Sized Mattress

Now, let’s outline how a good King-sized mattress can change your sleeping routine so that you make sure you’ve picked the right size:

  • More space. Obviously, you’ll have more personal space on a King mattress. This will help you get cozier and find a comfortable position to drift off more easily. Along with that, if you allow your pets to sleep on the bed — or, if you occasionally co-sleep with your kid — a few extra inches of space will also be beneficial.
  • Better support. The bigger area of a King-sized mattress allows for more even weight distribution. For example, if your partner is a large sleeper, you won’t feel how deep he dives into the mattress layers and your sleep will be uninterrupted.
  • Lower motion transfer. Due to the larger area, King mattresses also muffle sharp movements more efficiently than Queen ones. This might be an advantage for restless sleepers and their partners.
  • Healthier sleep. Overall, by having more room to move and get comfy, you can easily improve your sleep quality and even alleviate your sleep disturbances (assuming they were caused by a lack of space).

Aside from all of that, it would be unfair not to mention how luxurious a King mattress looks in a master bedroom. If you choose a high-profile bed and properly decorate it, you can easily turn your bedroom into the royal chambers.

Important Checks to Make Before Choosing a King Mattress for Your Bedroom

Finally, I want to briefly walk you through the little yet important details you need to consider if you want to choose the best King mattress on the market.

Here they are.

Room Space

A large mattress requires a lot of space to fit in properly. A King bed measures roughly 6 x 6.8 feet, and you need at least 2 feet more on each side to be able to get in and out of bed comfortably.

Add to this how much the pieces of furniture, such as nightstands and drawers, and the space between them will take — and you will see that not every room will be able to accommodate a King mattress.

I recommend that you opt for this size only if your bedroom measures at least 13 x 13 feet. In this case, you can comfortably lay out your King mattress along with the rest of the furniture, without making a room look crowded.

Bed-in-a-Box or Regular Mattress?

Another problematic moment with King mattresses is their weight and bulkiness, which can make transportation difficult. Especially if you choose brands like Saatva, who don’t ship their products compressed in a box. In a house with narrow staircases, with a bedroom located on the second floor, mattress delivery can turn into a challenge.

So, a bed-in-a-box might be a more suitable option here. However, compressed mattresses might not always expand completely, especially the cheaper ones. This may result in insufficient support and decreased durability.

Bottom line?

Read user reviews and choose trusted brands with a good history and reputation on the market. Also, steer clear of suspiciously low prices.

Alternatively, you may consider ordering a Split King configuration. This way your mattress will arrive as two separate halves. Moreover, you may be able to customize each half prior to purchasing.

How Will You Use It?

Your lifestyle may also impact mattress characteristics. 

For example, if you and your partner live minimalist lives, you may not need to overpay for a luxurious King mattress. A medium-priced bed without any bells and whistles can work fine for you.

If your pets sleep with you, then you might need something more durable and resistant to their claws. In this case, investing in a mattress with a removable and washable cover is a good idea. Also, make sure your mattress is made of heavy-duty materials.

Warranty and Returns

Since King mattresses are the priciest option on the market, it’s totally okay to want some funds  protection. Choose companies offering sleep trial. In this case, if your new mattress appears unsuitable for your needs after the break-in period, you can just fill in the return claim and get your money back.

Also, learn about warranty conditions. Most mattress brands offer you a refund or replacement in the case of craftsmanship defects, but it’s always better to double-check.

Note that any spills and stains on your mattress will void the warranty, so it’s better to purchase a waterproof protector along with the mattress.


King mattresses are popular for a reason. They give you more space to stretch, which is especially important if you share a bed with someone who sleeps in a starfish position. I’ve collected five models that can please even the pickiest sleepers. They have excellent value for money and can offer you great support and serve for years to come. Speaking of my personal favorite, I’d pick the Avocado.

First, because I really love natural mattresses and the approach the company uses to reduce the ecological footprint.

Second, the mattress can support you equally well in any sleeping position.

Finally, the Avocado is pretty durable, which means that it will work out every cent invested in the long term.

However, if you’re a fan of the hugging foam feel, I’d suggest you go with the Nectar mattress. This is a reasonably priced bed with temperature-neutral construction and noticeable pressure-relieving effects.

So, why are you considering getting a King-sized bed? Does any model of those above seem suitable for you? You’re welcome to share in the comments below!

Additional Resources 

Best Queen Mattresses

Our research


Mattresses Considered


Hours of Research


Sleep Experts Consulted

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