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Best King Size Mattress: Buyer’s Guide

Malena Piper

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King size mattress shopping is an overwhelming task. Because there’s no such thing as a one-size-fits-all mattress, you’ll need to consider the mattress’s quality, sleep technologies, and your sleep preferences to find your perfect bed.

In this article, we’ll explore the six best king-size mattresses, the types of king-sized beds available and their benefits, as well as other mattress features.

If you’re searching for a king-size bed, you have many mattresses to choose from, and many factors to consider. In this guide, we’ll discuss everything you need to know when buying a new bed.

Best King Size Mattress

Best King Size Mattresses

MattressHighlightPrice of a King
BEST KING MATTRESS FOR COUPLES
Amerisleep AS3
The AS3Amerisleep
Features HIVE® technology and plant-based memory foams to promote better sleep.
BEST RESTORATIVE KING MATTRESS Zoma Sports Mattress Gel-infused memory foam helps combat body heat.
BEST KING SIZE HYBRID Zoma Hybrid Mattress Triangulex™ and Reactiv™ technologies ensure you get a good night's rest.
BEST BARGAIN PRICE KING MATTRESS Vaya Mattress
Vaya Vaya
Budget-friendly plush mattress with a bouncy yet conforming feel.
Tuft & Needle Mint
Tuft & NeedleMint
Features T&N Adaptive® foam for superior pressure relief.
$1145
Purple Mattress
PurplePurple Mattress
Offers "No-Pressure" support with their Purple Grid™
$1189
snuggle-pedic memory foam
Snuggle-PedicSnuggle-Pedic
Mattress
Improves spinal alignment through contouring foams.
$1300

Best King Mattress for Couples: Amerisleep AS3

Amerisleep AS3 BEST KING MATTRESS FOR COUPLES
Amerisleep AS3

The Amerisleep AS3 uses three inches of pressure-relieving, plant-based memory foam and zoned back support to deliver better sleep. Plus, it’s designed to be comfortable for most sleeping positions.

Take 30 percent off the AS3

Use code AS30

Get discount
Best mattress features
  • Bio-Pur® foam is quick to release absorbed heat.
  • Targeted back support and added pressure relief to joints from HIVE® layer.
  • Plant-based Bio-Pur® foam is durable and quick to regain its original shape.
Recommended for...
  • Partners who prefer different sleep positions and want a universally comfortable mattress.
  • Side, back, and combination sleepers.
  • Shoppers who responsive mattress that's easy to move across.

The Amerisleep AS3 is an eco-friendly and affordable bed in a box mattress. It is designed for versatility, so it comfortably supports all sleeping positions and most body types. The high-quality mattress comes in twin, twin XL, full, queen, king, California king, and split king size.

The cover of the AS3 is made of a lightweight, airy fabric to help you stay cool throughout the night. It is also removable and washable to help preserve the life of the mattress.

As the top layer, Amerisleep’s plant-based Bio-Pur® material is more breathable than traditional memory foam. It bounces back to its original shape within seconds, improving spinal alignment through support and pressure relief.

Next, the Affinity layer with HIVE® technology provides targeted support and comfort. It contains hundreds of hexagonal cutouts grouped together in five comfort zones to offer hip and shoulder pressure relief as well as support for the head, lumbar, and feet.

Below the transitional layer, the supportive Bio-Core® layer extends the mattress’s life and acts as the mattress’s supporting layer.

Amerisleep offers a 20-year warranty and replaces faulty materials, including indentations greater than .75 of an inch. They will not repair or replace normal mattress deterioration and damage from improper use.

Amerisleep’s 100-night sleep trial offers you the chance to try the mattress before committing to the purchase. If you’re not sleeping well, you can return the bed without a hassle.

Best Restorative King Mattress: Zoma Mattress

Zoma BEST RESTORATIVE KING MATTRESS
Zoma Mattress

The Zoma Mattress is designed to help you get better, deeper sleep and is comfortable for the majority of sleepers. What makes it even better? It costs less than $1,000 for a King.

Take $150 off the Zoma Mattress

Use code WIN150

Get discount
Best mattress features
  • Responsive medium feel provides a balance of support and comfort.
  • Gel-infused memory foam feels refreshing chill as it molds to the body.
  • Sturdy base foam supports a sleeper and structures the rest of the mattress.
Recommended for...
  • Physically active couples and single sleepers.
  • People who live in warm climates or possess warmer than average body temperatures.

The Zoma Mattress is designed to increase athletic performance. The medium feel bed promotes restorative sleep with balanced firmness and conformability. The mattress comes in one firmness but is available in queen and king size.

Zoma’s polyester-elastane cover has a knit weave. It’s stretchy, breathable, and increases airflow through the mattress.

Two inches of Triangulex™ technology make up the comfort layer. It has pressure relieving qualities similar to Amerisleep’s HIVE® technology. The middle is solid for hip support and then segments out into triangle-cutouts for additional pressure-relieving comfort, promoting pressure. This layer also promotes air circulation through the air passages created by the cut-outs.

Below the Triangulex™ layer, two inches of active recovery Reactiv™ material has a latex-like feel buffering between the comfort and support layer.

The final layer is the Support+, which enhances the sleeper’s spinal alignment and offers stability to the layers above.

Zoma will replace any defective mattress under the terms of their warranty, including sagging deeper than .75 inches. They do not replace damage related to regular wear and tear.

The Zoma Mattress comes with a 100-night sleep trial, which offers customers the chance to test the mattress before committing to the purchase. You will receive a full refund if you choose to return your mattress.

Best King Size Hybrid: Zoma Hybrid

zoma hybrid BEST KING SIZE HYBRID
Zoma Hybrid

Bouncier than the original Zoma Mattress thanks to its pocketed coils, the Zoma Hybrid still features the recovery foams that set the Zoma Mattress apart from other beds.

Take $150 off the Zoma Hybrid

Use code WIN150

Get discount
Best mattress features
  • Gel foam disperses heat while AirCloth cover makes it easy for the heat to escape.
  • Coils are sag-resistant thanks to the sturdy foam underneath and around the coil layer.
  • Every coil reacts independently, preventing motion transfer and sleep disturbances.
Recommended for...
  • Sleepers interested in a bouncy mattress that contours to the body.
  • Athletic couples and solo sleepers.
  • Hot sleepers who want a mattress that lets heat escape through the top and bottom.

The Zoma Hybrid is a springy alternative to the original Zoma Mattress. The hybrid is also marketed to people who lead active lifestyles, but it can help all sorts of people sleep better at night.

The knit-weave of the Zoma Hybrid’s AirCloth cover encourages breathability for less sleep disturbances.

The top layer is 2 inches of gel foam with Triangulex™ technology. The cutouts of Triangulex™ increase cushioning under your legs and shoulders, while offering firm back support. It’s also easier for air to flow through the cutouts and remove body heat.

The middle layer is 2 inches of responsive Reactiv™ foam. Reactiv™ limits sinkage, which makes it easier to move on top of your mattress.

The final layers are 7 inches of pocketed coils on a inch-thick foam base. Zoma wraps stiff foams around the coils for edge support, which can make it easier to move in and out of bed.

Like the Zoma Mattress, a Zoma Hybrid includes a 10-year warranty, with coverage offered for indentations that exceed .75 inches. Normal wear and tear isn’t covered under the Zoma warranty.

You have 100 nights to sleep on your Zoma Hybrid to ensure it’s the right bed for you. All returned mattresses are picked up by Zoma and donated or recycled.

Best Bargain Price King Mattress: Vaya Mattress

Vaya Mattress BEST BARGAIN PRICE KING MATTRESS
Vaya Mattress

You don’t have to spend an excessive amount of money to upgrade a master bedroom with a quality mattress, as the affordable Vaya Mattress shows.

Take $300 off the Vaya Mattress

Use code VAYA300

Get discount
Best mattress features
  • Adaptable foams provide comfort and support to any sleep position.
  • CertiPUR-US® certified foams experience minimal off-gassing for a better night's rest.
  • Aerated foams keep cool throughout the night.
Recommended for...
  • Couples with different sleep styles.
  • People looking for a large, durable mattress on a restricted budget.

The Vaya Mattress is an affordable bed with a unique feel. It has similarities to both memory foam and latex mattresses, with a conforming yet buoyant feel that’s suitable for all sleepers. A king size Vaya Mattress is an excellent way to upgrade your bedroom without breaking your bank account.

The Vaya Mattress has a simple two-layer design. Its foams are certified by CertiPUR-US®, which means they’re free of toxic ingredients and have low VOC emission levels.

The top layer is 3 inches of Vaya Comfort Foam. The comfort foam molds to your body for pressure-relieving cushion and provides springy support as well.

The base layer is 9 inches of Vaya Base Foam. This foam guards against sagging, extending your mattress’s expected lifespan.

As a seal of quality, every Vaya Mattress includes a 10-year warranty. Should your mattress sag beyond .75 inches, Vaya will offer to repair or replace it.

When the Vaya Mattress arrives, you have 100 nights to try it out. It’s best to unbox the bed as soon as you can to get the most out of your sleep trial.

Tuft & Needle Mint Mattress

tuft & needle mint TUFT & NEEDLE MINT MATTRESS
Tuft & Needle Mint Mattress

The Mint mattress is an upgraded version of Tuft & Needle’s original foam mattress.

Best mattress features
  • Cooling gels help maintain a consistent surface temperature.
  • T&N Adaptive® foam blends latex and memory foam traits for the best of each.
  • Sturdy materials promote a long-lasting mattress.
Recommended for...
  • Shoppers who want an inexpensive memory foam alternative mattress.
  • Hot sleepers looking for a cool and responsive mattress.

Tuft & Needle Mint Mattress is a pressure-relieving, supportive mattress with enhanced cooling technologies. It comes in twin, twin XL, full, queen, king, and California king size.

The soft and durable polyester blend cover allows the sleeper to sink into the mattress to feel its effects.

The comfort layer is made of three inches of T&N Adaptive® foam, which mimics latex and memory foam, without trapping heat.

Below, another two inches of T&N Adaptive® cooling gel foam buffers between the comfort and support layer with a firmer feel to keep the sleeper cool.

The last layer is made of a high-density foam, which supports the upper foam layers and prolongs the mattress’s longevity.

Tuft & Needle also offers a 10-year limited warranty, during which, Tuft & Needle will repair or replace manufacturing and material defects.

Tuft & Needle® offers a 100-night trial for customers. The customer can return the mattress within the 100 night trial period if it’s not a good fit.

Purple® Mattress

Purple Mattress PURPLE® MATTRESS
Purple® Mattress

The mattress’s No Pressure® Support creates a weightless feel that enables a sleeper to truly feel like they’re drifting off at night.

Best mattress features
  • Purple Grid™ supports the entire body while also conforming for pressure relief.
  • SoftFlex™ breathable fabric covers hundreds of air channels, lessening heat retention.
  • The Purple Grid™ snaps back into shape, resisting indentation for greater mattress longevity.
Recommended for...
  • Hot sleepers interested in a well-aerated mattress.
  • Partners with different sleep styles who want to share a bed.

The Purple® Mattress offers No Pressure® Support while promoting spinal alignment. It pairs with most foundations and is available in twin, twin XL, full, queen, king, and California king size.

The SoftFlex™ cover is made of knit polyester and maximizes the Purple Grid’s™ qualities.

The first layer is the Purple Grid™. It offers No Pressure® Support by flexing under pressure. It relieves pressure in sensitive areas and supports the hips and shoulders.

Below the Purple Grid™, a high-density poly-foam provides firm support, keeping the sleeper from sinking and making surface mobility better.

The base layer is made of HD poly-foam, adding to the mattress’s firmness and helping the mattress last.

Purple only extends its 10-year warranty to the original mattress owner. Purple will replace or repair the mattress in the case of defective materials or workmanship, including visible indentations greater than 1 inch, foam cracking or splits, and faulty zippers.

Purple requires customers to keep their mattress for at least 21 nights out of the 100-night sleep trial. After those initial 21 nights, you’re welcome to return the mattress if it doesn’t fit your sleep needs.

Snuggle-Pedic Memory Foam Mattress

snuggle-pedic memory foam SNUGGLE-PEDIC MEMORY FOAM MATTRESS
Snuggle-Pedic Memory Foam Mattress

With a stretchy, airy bamboo cover and ventilation channels, the Snuggle-Pedic can keep a couple of hot sleepers cool at night.

Best mattress features
  • Snuggle-Flex® layer increases the bed's pressure relief.
  • Bamboo cover remains cool naturally and keeps out allergens.
  • Airflow Transfer System™ technology increases circulation through the mattress.
Recommended for...
  • Sleepers looking for a mattress with a breathable, natural bamboo cover.
  • Shoppers interested in a mattress backed by a longer-than-average warranty.
  • People with allergies seeking a hypoallergenic bed.

Snuggle-Pedic’s mattress supports spinal alignment, limits motion transfer, and comes in twin, twin XL, full, queen, king, and California king size.

The zippered cover is made of knit KoolFlow™ bamboo fabric, which is stretchy, breathable, and hypoallergenic. The cover amplifies air circulation and wicks away moisture to keep the sleeper cool.

The 3-inch, high-density Snuggle-Flex® comfort layer utilizes Airflow Transfer System™ technology, which connects side channels and ventilated top holes to increase air circulation. The Snuggle-Flex® layer also conforms for extra pressure relief.

Seven inches of high-density channeled polyurethane make up the foundation layer. It supports the layers above and extends the mattress’s lifespan.

The Snuggle-Pedic Memory Foam Mattress comes with a 20-year warranty, which covers faulty materials and workmanship. Snuggle-Pedic offers a 120-night trial period where you may return it for a full refund if unsatisfied. Snuggle-Pedic claims financial responsibility for transportation fees.

How Big is a King Size Mattress?

There are a couple variations of the standard king-size bed,such as the split king and California king. These oversized mattresses are meant to accommodate those who need extra room to sleep comfortably.

The original king-sized mattress is 76 inches wide and 80 inches long. It’s 16 inches wider than a queen bed but remains the same length. For this size of bed, we suggest a room larger than 10 feet by 12 feet.

A California king is skinnier and longer than a king: 72 inches by 84 inches. It’s a great option for taller individuals but offers enough room for a pet to sleep with you and your partner. We recommend a bedroom larger than 12 feet by 12 feet for a California king bed.

A split king mattress is two twin XL mattresses placed side by side to equal the dimensions of a standard king. By using two twin XL mattresses, instead of one solid king mattress, couples can choose different mattress firmnesses without having to compromise on one mattress firmness and sacrifice their sleep quality.

Who Should Get a King Mattress?

While a queen works fine for couples, some individuals just need more space. A king offers more space to spread out, making it less likely that one partner will end up sleeping on the edge. Additionally, if you and your sleeping partner have a child who likes to sleep with you, a king-size bed will have the extra room.

Before committing to a king-size bed, make sure it can fit in your home. Measure out your bedroom to ensure you have enough walking room between the bed and the walls. You might also measure the hallways, stairs, and entryways to make sure you can get the king-sized mattress to your bedroom.

Things to Consider When Shopping for a King Size Bed

While it’s important to find a comfortable bed, you should consider the mattress’s durability, trial period and warranty, and your sleeping style as well.

Mattress Materials

Everyone has a unique set of sleep preferences. Some mattress types fill these requirements better than others.

Innerspring Mattresses

Innerspring mattresses, or traditional beds, have coil support systems, which push up against pressure. The coil system allows air to flow without restriction and creates a very supportive sleep surface, making it great for back and plus-sized sleepers. These mattresses usually come with a Euro or pillow top, which provides extra comfort for the sleeper, although the mattress’s overall design encourages allergen build-up.

Memory Foam Mattress

Memory foam mattresses alleviate back pain by contouring deeply and enhancing spinal alignment. However, memory foam can retain heat. To combat this, sleep experts engineered open-cell and plant-based foams, which wick away heat. Gel, copper, and graphite infusions are also added to foam layers to encourage cool sleeping.

Off-gassing is common with memory foam mattresses due to the petrochemicals used during the foam’s manufacturing. Plant-based memory foam will have less off-gassing.

Latex Mattress

Latex mattresses are extremely supportive and conforming to maintain spinal alignment. This mattress type is made from synthetic or natural materials, or both.

Natural latex beds are more expensive; however, they’re also hypoallergenic, antimicrobial, and biodegradable due to the rubber tree sap it’s made from.

Blended and synthetic mattresses do not have the antimicrobial and biodegradable qualities of natural latex, but they are still supportive and conforming. We suggest making sure a synthetic latex bed has a CertiPUR-US® certification to ensure the bed doesn’t have harmful additives.

We recommend latex to back and stomach sleepers. Back pain sufferers may also have interest in this mattress type.

Hybrid Mattress

Hybrid mattresses are a combination of innerspring cores and foam layers, making the mattress conforming, supportive, and motion isolating. Unlike innerspring mattresses, the hybrid isn’t as cooling due to its foam layers.

We suggest this mattress for back and plus-sizes sleepers because of the bed’s firm support.

Sleep Trials, Return Policy, and Warranty

A mattress company’s trial period, return policy, and warranty is a major consideration when you mattress shop. These three policies are designed to protect the customer from defective products or getting stuck with a bed they don’t like. Typically, the best mattress brands offer at least a 100-night sleep trial and a 10-year warranty with their beds.

We suggest reading the sleep trial, return policy, and warranty fine print before purchasing, so you are informed about the processes.

Return policy

We suggest looking for a company that takes responsibility for transportation, re-stocking, mattress pick-up, and donation fees to cut down on your expenses. Often, companies offering sleep trial will offer free transportation and returns are part of their service.

Sleep Trial

Sleep trials involve the customer testing the mattress in their home before fully committing to the purchase. During the allotted time, you can sleep on the mattress to determine if it matches your preferences. On the off-chance you don’t like the bed, you may contact customer service, arrange a mattress pick-up or donation, and have your money refunded. Make sure the sleep trial is labeled risk-free to avoid unexpected fees.

Warranty

We suggest looking for a mattress lasting ten or more years. The company should offer a repair or replacement for any manufacturing and material defects. Bear in mind, warranties do not cover regular wear and tear. Look over the warranty to see what the company will cover.

What Is Your Perfect Firmness Level?

Mattress firmness is rated on a scale from 1 to 10. A very firm feel is rated as a ten, while a plush bed is a one. Your preferences, sleep position, and body type contributes to the mattress feel, and your perfect firmness can fluctuate over time.

Your Sleeping Position

Your sleep position can point you to your perfect mattress firmness. You’ll want a supportive surface to enhance spinal alignment, but you also need pressure-alleviating materials.

Side sleeping is the most common sleeping position; it’s also the only sleep position needing a softer mattress. Since side sleepers balance on their hip and shoulder, pressure builds up there, causing pain and sore joints. The best mattresses for side sleepers are soft to medium in firmness since they can cradle the sleepers, alleviate pressure points, offer support, and reduce muscle and joint strain.

Back sleeper’s spines are aligned naturally when lying down. They don’t need a soft mattress to compensate for intense pressure points. A medium to medium-firm mattress will offer enough contouring and support to keep the back sleeper comfortable and the spine aligned.

Stomach sleeping is a very stressful position. It causes the back to arch, straining the back muscles and spine. To reduce the strain, we suggest a very firm mattress as a soft mattress will increase the strain by causing the hip to bow forward. A firm mattress will prevent bowing and encourage spinal alignment.

If you are a stomach sleeper, we suggest switching to side sleeping or sleeping without a head pillow to reduce pain. Instead, place a pillow under the hips to improve your alignment.

Your Body Type

Once you’ve considered your preferred sleep position, you’ll want to consider your body type. Your body type will help you decide if you need something a bit firmer or softer.

Those with smaller frames don’t place as much pressure on their mattress as larger individuals. Firm mattresses can cause unnecessary pressure points for lighter individuals, while soft mattresses offer the support they need while alleviating pressure.

Heavier individuals will not maintain an aligned spine on a plush mattress. Since heavier sleepers place more pressure on the mattress’s surface, they need a firm mattress to keep their hips and shoulders from bowing at the hips. A firm mattress allows the sleeper to sink and offers contouring properties to alleviate pressure and enhance spinal alignment.

Do You Have Any Special Sleep Needs?

If you suffer from sleep problems, you’ll want to consult your physician. Certain firmnesses and sleep technology can help you sleep better.

Allergy sufferers should consider buying a mattress with organic or hypoallergenic materials. Mattresses made of natural fibers, memory foam, and latex ward off allergens.

Those suffering from chronic pain want a firm mattress with cooling technology and high levels of motion isolation. A firm mattress will promote mobility, so joints and muscles don’t strain or experience jolting pain when a sleeping partner moves. Cooling technology will also ensure fluctuating temperatures don’t irritate the joints.

Individuals suffering from sleep disorders have different mattress needs depending on their condition. For instance, sleep apnea patients need a firm mattress to keep their airways open and reduce snoring, while insomnia sufferers could alleviate their symptoms by switching to a softer or more supportive mattress. In your have a sleeping disorder, we highly suggest seeing your physician to learn how to sleep well.

FAQs

Can you sleep without a pillow?

Most people won’t get a better night’s rest if they sleep without a pillow. Side, back, and combination sleepers need the neck support a pillow provides. Stomach sleepers may benefit from sleeping without a pillow, but you might want to consider switching positions instead, if you’re a stomach sleeper. Many experts consider stomach sleeping the most unhealthy sleeping position.

Does folding a mattress damage it?

The answer depends on how long you leave a mattress folded. Folding a mattress to make it easier to carry from one room to another shouldn’t damage your bed’s materials. However, leaving a mattress folded for days or weeks can compromise the bed’s support and comfort. If you plan on packing up your bed for a move, you might want to try compressing your mattress instead.

Why are hotel mattresses so comfortable?

Many hotels outfit their mattresses with extras such as toppers to improve the bed’s comfort. The bedding is usually washed and replaced daily, so you’re always lying on clean set of sheets. A hotel may also replace its mattresses more often than the average person would, guaranteeing that its guests are always sleeping on a fairly new mattress.

Is it better to sleep on a firm or soft mattress?

It’s best to sleep on a mattress that suits your sleeping style. Side sleepers usually rest well on a soft to medium mattress. Combination sleepers often benefit from a medium mattress. Back and stomach sleepers should consider a medium-firm to firm bed.

What are the most comfortable beds?

Many sleepers find mattresses with foam tops feel the most comfortable. A foam mattress conforms to your entire body, cushioning and supporting sensitive areas. You might want to consider a memory foam mattress or hybrid as you shop.

Conclusion

If you’re looking for a new king size mattress, make sure your bedroom can accommodate the bed. You want to think about your preferences, such as sleep position and any special conditions that might affect your sleep quality.

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