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Best King Mattresses

Updated November 2023
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Best of the Best
Saatva Classic Mattress
Classic Mattress
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Money Saver
Bottom Line

Don't let the lower price fool you; the Saatva mattress promotes comfortable, restful sleep just like pricier brands.


Although several hundred dollars less than other premium mattresses, the Saatva offers reliable support thanks in part to its innerspring build. Available in a 14.5-inch model. Choose from plush soft, firm, and luxury firm, and enjoy a 120-night sleep trial.


In the rare case that you need to return this mattress, you may run into hassles. Some owners gripe that it aggravated their back pain, but most rave about the comfort.

Best Bang for the Buck
Nectar Memory Foam Mattress
Memory Foam Mattress
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Most Versatile
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This is a supportive and cooling mattress that comes in a choice of all foam or hybrid designs to fit your individual sleep needs.


A premium mattress that's made with five foam layers that do a good job reducing motion transfer. Earns many 5-star reviews from customers who brag about deep, pain-free sleep. Top layer regulates temperatures and maintains coolness. Hybrid model is available for those who need firmer support. Backed by a forever warranty.


Mixed opinions about the firmness noted: some owners say the mattress begins to sag in the middle with use; others say it's too firm.

DreamCloud The DreamCloud Mattress
The DreamCloud Mattress
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Trusted Brand
Bottom Line

A hybrid design with layers that promote comfort put this popular mattress at the top of our list of recommended king models.


Highlights of this luxury mattress include its gel foam layer that doesn't put stress on pressure points and a transition layer that absorbs motion for uninterrupted sleep. Hybrid model offers both foam layers and inner coils that deliver medium support. Includes a lifetime warranty.


If you prefer a firm mattress, this one may not work for you. Not very impressive when it comes to cooling.

Birch by Helix Natural Mattress
Birch by Helix
Natural Mattress
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Most Eco-friendly
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If sustainability and natural products are priorities for you, this is the mattress to choose—not only is it eco-friendly, it's also comfortable and built to last.


This Birch mattress is made of natural wool and cotton that are sustainably sourced and toxin-free. Innersprings provide reliable support. Naturally hypoallergenic. Comes with a convenient 100-night trial.


Only one firmness option. The downside of the wool is that you may detect a strange odor at first, but fortunately, it tends to fade quickly.

Helix Twilight Luxe Mattress (King)
Twilight Luxe Mattress (King)
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Firm & Supportive
Bottom Line

This cooling king mattress from Helix impressed in firmness, loft, and support in our user testing.


King-sized (76 x 80-inch) mattress for side sleepers with pressure point relief at hips and shoulders. Among the most supportive surfaces we’ve tested. More than a foot (13.5 inches) height makes it easy to get in and out. Cooling covers help increase comfort and reduce sweating.


Setup can be hard for one person. Full inflation takes longer than 8 hours.

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BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. About BestReviews  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.About BestReviews 

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

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Buying guide for best king mattresses

Eating right and working out regularly are crucial to a healthy lifestyle, but getting a good night’s sleep can be just as important to feeling fit and avoiding illness. The right mattress makes all the difference in how well you sleep, which is why buying a high-quality king mattress can be a wise investment for your overall health.

A king mattress is one of the largest mattresses you can buy. It measures 76 inches wide and approximately 80 inches long, so it’s an ideal option if you share a bed with a partner and want to make sure that you both have plenty of space. However, it can also work well for larger single sleepers or people who prefer a lot of space to move around in while they sleep.

Not all king mattresses are created equal, though, so it’s important to know what to look for before you shop. BestReviews has you covered. Our shopping guide has all the information you need to find the ideal king mattress for your bed. If you’re still not sure which model to choose, we’ve included some of our top picks to make your shopping as easy as possible.

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If you lose or gain a great deal of weight, it might be time for a new mattress. The firmness and support that feel most comfortable for your body can change based on your weight.

Key considerations


The most important decision to make when you’re shopping for a king mattress is what type of mattress you prefer. The main types to choose from include the following:

  • Memory foam: This type of mattress offers superior support and comfort. It is a particularly good option if you sleep on your side. Memory foam molds to the contours of your body, so it provides effective support for shoulders and hips. These mattresses don’t sag the way some other types can, so you don’t have to worry about flipping the mattress regularly.

  • Gel: This type of mattress usually features a combination of foam and gel, so it feels a little different than a foam mattress. A gel mattress doesn’t absorb body heat the way other mattresses do, so it’s an ideal option if you get hot while you sleep.

  • Innerspring: This type of mattress has a series of internal metal springs that provide support. More springs or coils usually means more support, but the distribution of the coils determines how well the mattress conforms to the shape of your body. Innerspring mattresses work well if you sleep on your back, side, or stomach.

  • Pillow top: This type of mattress has an extra upholstered layer on top of what is usually an innerspring mattress. It has an extremely cushiony feel and provides excellent alignment for your back.

  • Adjustable: This type of mattress allows you to have support exactly where you need it because the base is adjustable in specific areas. You can usually elevate your head or feet and increase support for your back. This makes an adjustable mattress ideal if you suffer from back pain, muscle pain, sleep apnea, or acid reflux.


Most king mattresses are approximately 10 inches thick. However, you can find models that are thin as 5 inches or as thick as 15 inches. In most cases, the thickness you prefer depends on your weight. If you’re fairly light, a thinner mattress usually feels more comfortable. If you’re heavier, you’ll likely sleep better on a thicker mattress.

King mattress features

Motion isolation

Most king mattresses are used by two sleepers at the same time, so it’s easy for one partner to disturb the other when they get in and out of bed or toss and turn all night. That’s because the movement on one side of the mattress results in motion transfer that’s felt on the other side. Some king mattresses are made with softer, adaptive interior layers that are able to limit motion transfer, meaning a restless sleeper is less likely to disturb a partner.


For many people, a bedroom that’s too warm makes it difficult to get a good night’s sleep. If you’ve adjusted the HVAC in your home and are still too hot at night, choosing the right king mattress for your bed may help.

Many mattresses capture and trap body heat, making you hot and disrupting your sleep. To stay more comfortable, opt for a king mattress that maintains a neutral temperature. Hybrid and innerspring mattresses allow air to circulate, so they’re ideal options for hot sleepers. For the coolest night’s sleep, choose a gel mattress. These are the best at boosting air circulation so your body heat isn’t trapped by the mattress and you stay cooler. Avoid foam and latex, which tend to sleep the hottest.

Antimicrobial/dust resistance

If you suffer from allergies or get sick regularly, it can help to select a king mattress with some type of antimicrobial, dust-resistant layer to keep germs, dust mites, and mold at bay. Foam and latex are naturally antimicrobial and dust mite and mold resistant, while innerspring and pillow top mattresses must have some sort of antimicrobial and dust-resistant cover to prevent you from getting sick while you sleep.

Smart features

These days, it’s possible to buy “smart” versions of nearly any household item, and king mattresses are no exception. If you’re having trouble sleeping and want a mattress that can help diagnose and address your issues, consider a smart king mattress. These models usually offer a sleep-tracking feature that allows you to better understand your sleep patterns, as well as a temperature-regulation feature. Some are even equipped with an alarm to make sure you wake up on time. Just know that you need a smartphone or tablet to download the mattress-connected app that stores your data.

King mattress prices

King mattresses vary in price based on the type and thickness. Most models range from $200 to $5,800.

Memory foam king mattresses cost $575 to $900 for models that are between 6 and 10 inches thick. For mattresses that are between 10 and 15 inches thick, you’ll pay between $900 and $2,000.

Gel king mattresses are a fairly affordable option. Models between 6 and 10 inches thick range from $400 to $720. Those between 10 and 15 inches thick cost between $720 and $1,575.

Innerspring king mattresses are typically the most affordable. Models that are between 6 and 10 inches thick range from $200 to $700. Models that are between 10 and 15 inches thick cost between $700 and $1,325.

Pillow top king mattresses can be fairly pricey because they tend to be on the thicker side. Those that measure about 10 inches thick range from $1,400 to $2,500. Those that measure more than 10 inches thick can cost between $2,500 and $5,000.

Adjustable king mattresses are usually the most expensive option. You’ll usually pay between $3,700 and $5,800, depending on the number of features.


  • Keep the mattress dry. To maintain your king mattress, it’s important to keep it dry. Adding a mattress cover before you make up your bed can help prevent the growth of mold and mildew. Wash the cover every few weeks to keep it clean.

  • Vacuum your mattress. Even if you change your sheets regularly, it’s a good idea to vacuum your mattress every week. That helps remove dead skin cells that may attract dust mites, which can trigger allergies.

  • Brush some baking soda into the mattress to help remove any odors. Be sure to vacuum up any residue from the baking soda before making your bed.
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If you’re worried about chemicals in a foam mattress, opt for one that’s certified by CertiPUR-US. which means an independent lab has verified that the foam meets emissions and content standards.


Q. How do I know when it’s time to replace my mattress?

A. In general, most mattresses should be replaced at about the seven-year mark. If you wake up with a sore back, neck, or shoulders, it’s likely time for a new mattress. Keep an eye out for indentations or sagging in your mattress as well, which are signs that it has seen better days.

Q. What type of king mattress is best if I sleep on my stomach?

A. If you’re a stomach sleeper, avoid memory foam, which molds to your body and may feel slightly suffocating if you sleep face down. Opt for a firmer mattress to offer effective support. Innerspring and firm foam models are ideal options.

Q. What details are most important if I’m buying a king mattress online?

A. Buying a mattress online is easier in many ways, but the one drawback is that you’re not able to test it out to see if it suits your needs the way you would in a store showroom. When you’re shopping online, always check the return policy to make sure that you’ll have enough time to test the mattress and will receive a full refund if you’re not happy with the model you choose.

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