14 Best King Size Mattress In 2021 (Our Top Rated List)

Best King Size Mattress

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While a Queen mattress offers a good balance in terms of size and function, you may eventually find that you need more space, whether you sleep alone or with a partner, more space when sleeping can only be beneficial. Buying the best king size mattress is one of the best ways to add more surface area to your sleeping environment. 

There are quite a few options when looking to get the best king size bed today, with a lot of companies even offering a bed-in-a-box solution. We explore 12 of the top options that you can buy – and tell you how each of these mattresses would benefit you. We also share a buying guide to help you understand what a king size mattress can do for you and what to look for when buying this type of product.

What Is The Best King Size Mattress?

Here is the best king size mattress in 2021:

  1. Editor’s PickZoma Mattress
  2. Best Hybrid MattressAmerisleep AS3 Hybrid
  3. Most Affordable MattressVaya Mattress
  4. Best Customizable Firmness Nest Alexander
  5. Best Medium FirmnessNectar Mattress
  6. Copper-Infused MattressLayla Mattress
  7. Best Cooling TechnologyBrooklyn Aurora Mattress
  8. Best Innerspring MattressSaatva Mattress
  9. Best for AthletesBear Mattress
  10. Best Handcrafted Mattress Loom and Leaf Mattress
  11. Best Custom-Made FoamPurple Mattress
  12. Best Luxury ExperienceWinkbeds Mattress
  13. Best Award-Winning MattressHelix Mattress
  14. Best Plush MattressLucid Mattress
Editor's Pick

Zoma Mattress

Best Hybrid Mattress

Amerisleep AS3 Hybrid

Most Affordable Mattress

Vaya Mattress

Best Customizable Mattress

Nest Alexander Signature Hybrid

Best Medium Firmness


Copper-Infused Mattress

Layla Sleep

Best Cooling Technology

Brooklyn Aurora

Best Innerspring Mattress


Best for Athletes

Bear Mattress

Best Handcrafted Mattress

Loom and Leaf

Best Custom-Made Foam

Purple Mattress

Best Luxury Experience

Winkbed Mattress

Best Award-Winning Mattress


Best Plush Mattress


Best King Size Mattress For 2021 – Reviewed

With many options to choose from when looking for the top-rated king size mattress, you may feel confused. You do not want to invest in a product that will end up a disappointment, after all. 

Below, we share our selection of the best king size mattresses that you can buy in 2021. Every one of these mattresses was handpicked to ensure we only share products that are able to help you experience the true benefits that a king size mattress is supposed to offer you. 

1. Zoma Mattress - Editor's Pick

Zoma Mattress - Editor's Pick

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Our editor’s pick for the best king size mattress is the Zoma Mattress. This bed has a medium firmness that most couples and combination sleepers find comfortable and supportive.  Whether you and your partner prefer to co-sleep with your children or if you both have different sleep styles, a king size Zoma Mattress will help you find a better night’s sleep.

The Zoma Mattress has a plush memory foam comfort layer infused with cooling gel to combat heat retention. With a ventilated cover, body heat quickly releases from the mattress to prevent over-heating and night sweats.

The transition layer of the Zoma features their responsive foam, Reactiv™. This material has a slight bounce to prevent over-sinking and spinal misalignment, perfect for heavier sleepers and those with back pain.

The Supportive+ foam in the base of the Zoma Mattress is resistant to indentations, ensuring the mattress remains even for many years. Zoma also includes a 100-night sleep trial and a 10-year warranty with each mattress purchase.

2. Amerisleep AS3 Hybrid - Best Hybrid Mattress

Amerisleep AS3 Hybrid - Best Hybrid Mattress

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Our favorite king size hybrid mattress is the Amerisleep AS3 Hybrid. This bed has a combination of conforming plant-based memory foam and pocketed spring coils to provide cushioning and support. The medium firmness is suitable for most sleep styles, including back, side, and combination sleepers.

The Bio-Pur® plant-based memory foam on the top of the AS3 Hybrid cushions and contours to the joints to prevent pressure points. Since this foam is made with fewer synthetic oils, it is naturally breathable and more responsive than most mattress foams, so it won’t retain heat or lose its shape over time. Together with the ventilated cover, Bio-Pur® ensures your mattress stays cool and cozy.

The base of the AS3 Hybrid features pocketed spring coils. Each of these coils is individually wrapped for better contouring and pressure relief. This base keeps body weight evenly distributed so the spine is neutral and the muscles are relaxed. 

A 1-inch layer of extra-firm foam sits just beneath the pocketed coils for shock absorption and motion isolation. 

Like all Amerisleep Mattresses, the AS5 Hybrid comes with a 100-night sleep trial and a 20-year warranty. 

3. Vaya Mattress - Most Affordable Mattress

Vaya Mattress - Most Affordable Mattress

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The most affordable king size mattress on our list is the Vaya Mattress. For a king, the Vaya is priced at $799, this includes their 100-night sleep trial and a generous 10-year warranty. Although it comes at a budget-friendly price, it is made with two layers of high-quality foam.

The top layer features Vaya’s proprietary comfort layer. While this material is soft and conforming, it also has a natural elasticity to promote a healthy sleep position. The slight bounce of this foam also makes it easier to get in and out of bed comfortably. 

The sturdy foam in the base of the Vaya guards against sagging and indentations. This stable base allows you to pair the Vaya with a slatted or solid bed frame. 

Both foam layers are also certified by CertiPUR-US® to be non-toxic and free of harmful additives and chemicals. 

4. Nest Alexander - Best Customizable Mattress

Nest Alexander - Best Customizable Mattress

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The Alexander Signature Hybrid mattress is our top pick for this list. The mattress comes in various firmness options, allowing you to choose something that feels more ideal underneath your body. While this is one of the more expensive mattress options on the market, the quality is unmatched by many of its competitors. 

The Nest Alexander Signature Hybrid mattress is available in three primary firmness levels. This includes a luxury firm, a medium, and a plush option. You can also choose one of the internal split systems for a more customized sleeping experience. 

The mattress uses a special titanium infused foam that helps to provide a higher quality product. The hybrid mattress combines foam and a pocketed coil design. This means at the top; the mattress offers a soft and comfortable surface. The lower layers of the mattress feature individually-wrapped coils that make the product supportive. 

The Nest Alexander Signature Hybrid mattress comes with a 100-night trial offer. You also get a lifetime warranty when you decide to invest in this mattress. 

Read our full Nest Alexander Mattress Review here.

5. Nectar - Best Medium Mattress

Nectar - Best Medium Mattress

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If you are looking for the best king size memory foam mattress, then the medium mattress for Nectar is a great option. This Nectar Memory Foam Mattress offers an all-foam construction that still provides a medium firmness feeling to it, which means you will not sink into the bed when you lay down. 

A sturdy high-density foam is used as the bottom layer of the Nectar Memory Foam mattress. This adds to the durability of the mattress. At the same time, it ensures that you have enough support at the top while sleeping. 

The mattress comes with one of the longest seeping trial offers in the industry. You can take the mattress for a test during a period of 365 days. This means you can return it for a refund during the first year after purchase. In addition to the trial offer, the Nectar Memory Foam Mattress also comes with a lifetime warranty. This ensures your mattress is protected against sagging for as long as you continue to use it. 

Read our full Nectar Mattress Review here.

6. Layla - Copper-Infused Mattress

Layla - Copper-Infused Mattress

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The Layla Memory Foam Mattress uses a copper-infused material to give you a multi-functional piece of furniture that contributes to a better night’s sleep. This mattress also comes at a more affordable price tag than some of the competitor memory foam mattresses that you will find on the market today. With this in mind, it makes for an excellent investment into better sleep. 

Another thing that makes the Layla Memory Foam Mattress a unique entry on our list is the fact that it is a flappable mattress. On the one side, the mattress features a soft structure with a 4.0/10 firmness rating. On the other side, you get a firmer mattress that adds more support. This allows you to choose how you want to sleep – simply flip the mattress for a different experience. 

The Layla Memory Foam Mattress comes with a 120-night money-back guarantee. This ensures you can get a refund if you do not like the mattress. The product is made in the United States, and buying this one gives you free shipping and returns. You also get a lifetime warranty with this particular memory foam mattress. 

Read our full Layla Mattress Reviews here.

7. Brooklyn Aurora- Best Cooling Technology

Brooklyn Aurora- Best Cooling Technology

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The Brooklyn Aurora is another great option if you are looking for the best king mattress. The mattress has a large focus on providing a more significant cooling action while you sleep. A heated environment is known to reduce sleep quality. With the cooling effects of this mattress, you may find that you sleep cooler and better at night. 

This is a hybrid mattress that combines two effective sleep system into a single piece of furniture. At the top, there are several layers of foam that help to add comfort and a plush feeling to the mattress. Below the foam, you will find an eight-inch base that consists of Ascension X coils. These coils help to make the mattress more reactive. They also add more support and ensure the mattress is able to offer you motion isolation. With this in mind, the Brooklyn Aurora also makes for the perfect king size mattress when sleeping with a partner in the same bed. 

Brooklyn Bedding offers a 120-night trial with the purchase of their Aurora Hybrid mattress. The company also offers a 10-year warranty period with this mattress. The mattress itself is made locally in the United States.

Read our full Brooklyn Mattress Review here!

8. Saatva - Best For Innerspring Mattress

Saatva - Best For Innerspring Mattress

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If you prefer an innerspring feeling, but would also like to experience a plush touch on the upper surface of your bed, then the Saatva mattress is a good option to consider. This is a multi-layer mattress system that provides an ideal sleep for everyone – you should be able to experience a good night’s sleep regardless of your sleeping position with this mattress. 

The Saatva mattress is primarily an innerspring mattress that uses two different spring layers. The first is a layer of individually-wrapped coils. Beneath the coils, you will find another innerspring layer. These two layers help to make the bed more supportive and provide that innerspring feeling that a lot of people desire in a mattress. 

At the top of the Saatva mattress, a Luxury Euro Pillow Top is included. This layer uses memory foam to add comfort to your mattress. The layer also helps to minimize the firmness that you may feel with the two innerspring systems used in the mattress. 

The Saatva mattress is available in three different firmness levels. You can choose the one that best suits your needs and sleeping preferences. 

You are provided a 120-night period to test the mattress. During this time, a money-back guarantee applies to your purchase. The mattress is also accompanied by a 15-year warranty. 

Read our full Saatva Mattress Reviews here.

9. Bear Mattress - Best For Active Lifestyle

Bear Mattress - Best For Active Lifestyle

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The original Bear Mattress is able to give you two major benefits that you need to take into consideration. First of all, this mattress was made particularly for those people who are living an active lifestyle. The mattress features a unique design that helps to keep you comfortable and cool while also speeding up recovery after an intense workout you had during the day. 

The Bear Mattress also comes with a price tag that is significantly lower than many of the alternative options that you are going to find on the market today. This makes the mattress a more affordable option when you are shopping on a tighter budget. 

The Bear Mattress combines multiple layers of foam to give you a comfortable sleeping experience. A Celliant cover is used, which is constructed from breathable material. This cover keeps the mattress cool at night. The upper layer of foam uses Graphic-Gel Memory Foam. This is a cooling foam that helps to reduce the temperature at night. Transition foam is used to assist in providing you pressure relief, with a high-density foam is used as the base of the mattress for better durability. 

You get free shipping and returns with the original Bear Mattress. The mattress features a 100-night risk-free trial offer, and the manufacturer offers a 10-year warranty. 

Read our full Bear Mattress Reviews here.

10. Loom and Leaf - Best Handcrafted Mattress

Loom and Leaf - Best Handcrafted Mattress

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If you are looking for something that adds a different element, why not consider a mattress with handcrafted layers? The Loom and Leaf mattress, a product by the Saatva company, offers you a handcrafted mattress that focuses on providing comfort and support at the same time. The mattress comes in two different firmness options, including a relaxed firm and firm. The relaxed firm has a medium feel to it but adds additional support compared to the average medium firmness mattress. 

The Loom and Leaf Memory Foam Mattress uses high-density memory foam in order to make the mattress more durable. It also features cooling layers, which enhances the breathability of the mattress. This helps to move heat away from your body when you sleep and ensures you do not build up excess heat. 

An organic cotton cover is used in the mattress, making it a safer choice and a great option for people who prefer environmentally-friendly items in their homes. 

There is a 15-year warranty that comes with the purchase of the Loom and Leaf Memory Foam Mattress. You are also given access to a 120-day sleep trial. Give the mattress a test for the first four months before you decide if you want to keep it.

Read our full Bear Mattress Reviews here. 

11. Purple - Best For Custom-Made Foam

Purple - Best For Custom-Made Foam

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The Purple mattress is quite unique, using a special type of Purple Grid memory foam system. This system was designed to eliminate specific pressure points that you find with the average mattress and give you a significant improvement in the alignment of your spine. 

The Purple Mattress is able to adapt to your body perfectly. This means the mattress is good for any sleeping position. Open-air channels are used to help improve the breathability of the mattress. In turn, this leads to a cooler night’s sleep. 

The mattress is made from CertiPUR-US certified foam materials, making it a safer option to consider too. 

You get a 10-year limited warranty with the Purple Mattress. There is a 100-night No Pressure Guarantee that accompanies your purchase as well. 

Read our full Purple Mattress Review here. 

12. Winkbed - Best For Luxury Experience

Winkbed - Best For Luxury Experience

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When luxury is an experience you desire without a hefty price tag, then the original WinkBeds Luxury Hybrid Mattress is a good option you should look at. This mattress comes with a hybrid system, which means it combines both foam layers and an innerspring system. The result is greater comfort, as well as adequate support. 

The mattress is available in four different firmness levels, which means you can choose a firmness that will be most suited to your preferences. There is a 120-night trial offer that accompanies the mattress. This gives you more than enough time to test the mattress and see if you want to sleep on it. 

The Winkbeds Luxury Hybrid Mattress features a lifetime warranty, but you should take note that it does not provide 100% coverage of a replacement mattress. 

Read our full WinkBeds Mattress Review here. 

13. Helix - Best For Award-Winning Mattress

Helix - Best For Award-Winning Mattress

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The Helix Sunset Luxe mattress has won several awards for being comfortable, yet also supportive mattress. The product comes in a soft feeling and firmness level. This is a great choice for smaller people who do not have problems sinking into a mattress due to their weight. 

The mattress features a quilted pillow top at the surface. A breathable Tencel cover is also used. This provides a way of reducing heat more significantly at night. The plush feeling also helps to provide better comfort while sleeping. The mattress is especially great for side sleepers, due to the pressure relief system that is used. 

You get a 10-year warranty with the purchase of the Helix Sunset Luxe mattress, as well as a 100-night sleep trial. 

Read our full Helix Mattress Reviews here.

14. Lucid (Best For Low Budget)

Lucid (Best For Low Budget)

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If you have a low budget, then the Lucid brand is definitely a company you want to look at. The 10-inch Plush Memory Foam Mattress from Lucid is a popular option for people who need the top-rated king size mattress without spending a lot of money. 

The mattress features a plush feeling that is ideal for lighter individuals. The product is made from CertiPUR-US certified foams, ensuring you get a safer mattress that is also environmentally-friendly. The mattress comes as a bed-in-a-box solution and is shipped to your door for free. 

All mattresses by the Lucid brand features a 10-year warranty to help protect your investment.

Read our full Lucid Mattress Reviews here.

Best King Size Mattress Buying Guide

Now that we looked at the top option when buying the best king size bed, we also want to share a short buying guide. This buying guide will help you understand what makes a king-size mattress such a desired piece of furniture. We also share a few useful tips to help you understand what to look for when investing in a king-size mattress. 

Why choose a king-size mattress?

Size is definitely the main reason why many people are opting for a king-size mattress over the other options that are available. Many people aim to have a king-size bed in their room eventually – it is often not the first mattress that you will opt for, but one that you will have as a long-term goal. 

There are many other reasons why a king-size mattress may be an ideal choice for you. One example would be for couples. When you sleep with someone on the same bed, it restricts the available surface area for both you and your partner. With smaller mattress sizes, the available area you can sleep on becomes even more restricted. A king size mattress offers a much larger surface for you and your partner to enjoy. 

A king size mattress also offers more flexibility in terms of how you want to sleep. There is no need to worry about rolling off the bed. You will also not wake up in the middle of your night with arms or legs hanging off the mattress. This, in turn, could be a great way for you to experience an enhanced sleeping experience. 

With sleep deficiency being linked to heart disease, high blood pressure, and even type 2 diabetes, it is crucial that you take appropriate steps to improve your sleep quality. 

What’s the difference between a king and California king size mattress?

If you have been shopping for the best king size mattress, you will notice that there are two popular king sizes available. This includes the standard king size option. An alternative called the California king size mattress is also available. You should get an understanding of the difference between these two before making a final decision. 

A standard king size mattress has a measurement of 76 inches by 80 inches. For most people, including couples, this is an ideal mattress size to ensure they are able to sleep comfortably. 

A California King provides a taller mattress model, which is good for people who are taller than what would generally be considered “average.” At the same time, you should note that the California king has a narrower width. The mattress generally measures 72 inches by 84 inches. 

It means the mattress is about four inches narrower than the standard king size mattress. The four inches is rather added to the length of the mattress. While the four-inch improvement in length may seem insignificant, it could mean the difference between your feet staying on or off the bed if you are very tall. 

What is a good price for a king-size mattress?

Let’s be clear – do not expect a king-size mattress to be as cheap as the twin mattress you added to your kid’s bed. A good king size mattress will not be cheap. Sure, there are a few cheap options you can get your hands on at a local mattress store, but the quality will generally not be sufficient. 

There are studies that show the design and construction of a mattress that impacts your sleep. If you sleep on a cheap mattress with poor quality construction, you may experience back pain. You could even find that you are unable to fall asleep, or you constantly wake up at night. 

Thus, try not to opt for a king-size mattress that is too expensive. 

When you look at the price of a king-size mattress, you should consider the type of mattress you are interested in. There are a few different options to choose from – and each of these comes with its own price range. 

The cheapest option would be a foam mattress. A king-size foam mattress has an average price tag of $860. There are a few higher-quality options available, with price tags going up to about $1,400. A good alternative to foam is a latex mattress, but this one comes at an average cost that is double the amount for a foam mattress. The average price for a latex king size mattress is about $1,600.

An innerspring mattress is a good and supportive option for many people, with an average price tag of $950. Some innerspring mattresses do come at a higher price tag – up to $2,500 in some cases. 

Hybrid king size mattresses are becoming very popular. These mattresses combine an innerspring system with a foam design. The average price for a king size hybrid mattress is about $1,850. 

You should note that these are average prices. The price you pay for a king mattress may be higher or lower. 

What to consider when buying a king-size mattress?

When you decide to look for the best king size bed, there are a few things to consider when buying the mattress. By understanding what to look for, you will be able to get more value for the investment that you are about to make into this piece of furniture. 

You should first consider the type of material you prefer. There are different materials used in the construction of king size mattresses. For example, you might prefer to look for the best king size memory foam mattress if you need a bed that is responsive and supportive, while also providing excellent cooling effects. Some people prefer an innerspring feeling. In such a case, you could look for an innerspring mattress or opt for the newer hybrid models instead. 

Once you know the type of mattress you prefer, take a look at the specific materials. Memory foam is a popular material, but there are different types of memory foam. Some companies use a unique way of creating memory foam that can provide extra benefits. 

You should also consider some of your own personal preferences. This includes your preferred sleeping position. Some mattresses are flexible and good for any type of sleeping position. Others, however, may rather be appropriate for specific sleeping positions. 

Consider other factors like the breathability and cooling effects of the mattress too. You do not want to sleep hot. There are scientific studies that show the temperature of your sleeping environment can have an impact on your sleep quality. A hot environment often leads to sleep disturbances. This causes sleep deprivation and puts you at risk of health complications. 

What is the best king size mattress for every sleeping position?

Your preferred sleeping position should be taken into account when you decide to buy a new king size mattress. This is actually one of the more important things that you should look at. There is a mattress that provides the ideal firmness and comfort level for every type of sleeper. 

If you are a side sleeper, consider a mattress with a softer firmness level. Also, make sure the mattress has pressure relief at your shoulders and hips. Back sleepers should prefer a medium firmness mattress. This will add adequate support for helping to align your spine without being too hard on your back. 

If you are a stomach sleeper, then you should consider a bed with a higher firmness level. If your mattress is too soft, then it will cause your hips to sink into your mattress. This causes a misalignment in your spine. In turn, you are likely to find that you get up the next morning with back pain.  

Combination sleepers will generally need a mattress that is appropriate for any type of sleeping position. Many people do tend to change from one position to another during the night. A medium firmness mattress is an appropriate option to consider. The upper levels of the mattress should be made from a responsive material. 

How firm should a king-size mattress be?

King size mattresses are available in a large number of firmness levels. You can choose between a soft, medium, or firm mattress. There isn’t a single mattress firmness that is appropriate for everyone. Personal preference has a large role to play here. 

Consider a few factors about yourself. The primary factor would be your sleeping position, as mentioned in the previous point. Also, take note of the firmness level that you personally enjoy most. Some people prefer a soft feel to their mattress. Others rather prefer something firmer that adds more support underneath their body. 

Your body weight is another thing to consider. A king size mattress with a very soft firmness level may not be appropriate if you are overweight or obese. Your body weight can cause you to sink too much into the mattress. This will interfere with your spinal alignment. In turn, back pain is something that you are likely going to experience. 

Should I look for a king-size mattress that comes with a trial period?

Many of the online mattress brands offer trial periods with the purchase of their mattresses today. There are many reasons why this is a feature to look for. The great news is that most of the more popular brands tend to offer such a trial offer.

The trial offer that comes with the best king size mattress you buy will give you a certain period of time to sleep on the mattress. This allows you to see how well the mattress is able to help you sleep. Consider if the mattress is really worth the money you spent on it. 

Before the trial period expires, you should make a final decision as to whether or not you want to keep the mattress. If you are not entirely happy, contact the manufacturer. Most companies offer a full refund. 

Make sure to read the full terms and conditions disclosure related to the trial period before you go ahead and make the purchase. Some brands have specific terms that apply to the trial offer that might cause certain refund requests to be denied. 

What is the best king size mattress for couples?

Couples often choose a king-size mattress due to the larger sleeping surface. This, however, does not mean every single king size mattress on the market will be ideal for you and your partner. 

There are a few things that can make a king size mattress truly the best option for partners. 

Consider the firmness level of the mattress. You do not want a mattress that is too soft, as this may cause you and your partner’s weight to sink into the mattress. At the same time, the mattress should not be too firm. You do not want to feel like you and your partner are sleeping on the floor. 

A medium firmness king size mattress is a good option to consider. Make sure the mattress has a good breathability feature and the ability to keep you cool at night. Since two people are sleeping in the bed, it may cause an excessive build-up of heat in your bed. 

Another feature you want to look for is the motion isolation. This ensures movements made by your partner during the night will not interfere with your ability to sleep well. 

Should I use a topper with my king size mattress?

A popular question is whether a topper will be needed for a king-size mattress. Toppers have become quite popular, but since a king size mattress will already be a significant expense, you want to make sure it is definitely required before making a purchase. 

This is another area where personal preference needs to be taken into consideration. There are also cases where a topper would not be a useful addition to your mattress. This is the case if your mattress already has a soft feeling at the top, which is generally the case with both all-foam and hybrid mattresses. 

If you decide to buy a firm mattress to add more support to your body during the night, then a mattress topper could be useful. The topper will allow you to experience a softer feeling at the top of the mattress. 

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