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Oh, sweet, sweet sleep — how much better it is when you’ve got room to roam.

There are many king-size mattresses out there, but they’re not all made equal. The best one caters to your favorite sleep position and comfort preferences. Since we’re all different, we’ve included 15 of the best king beds, from memory foam to innerspring and split-king to cooling.

The best king-size beds

We based our pricing guide on standard king-size mattresses (not California, split, or flex-top, though some made our top picks):

  • $ = under $1,000
  • $$ = $1,000–$2,000
  • $$$ = over $2,000

Our criteria helped us narrow down the best mattress from the hundreds of options now on the market. It was a tough job, but we managed to do it based on this criteria:

  • Material quality. No one wants a bed that looks like a canoe in a year or 2. We looked for brands and models made of high quality materials that last.
  • Return policies, sleep trials, and warranties. The era of bed-in-a-box mattresses has led to lenient return policies, long sleep trials, and warranties to protect your investment.
  • Third-party certifications. Eco-friendly or not, a third-party certification that assures quality materials free of harmful substances and socially responsible manufacturing gets a thumbs up.
  • Comfort. We all have different comfort preferences, which is why we included so many different types of king-size mattress on our list. No matter who the mattress is made for, we chose models that feel amazing for their targeted sleeper.

  • Memory foam. All-foam or memory foam mattresses tend to conform well to the body, making them a top choice for side sleepers. Thankfully, they’re made in all firmness levels.
  • Innerspring. If you like a little bounce to your bed, an innerspring mattress is probably for you.
  • Hybrid. Foam beds can be too hot and innersprings too hard for some sleepers. Hybrids combine both features for a happy compromise.
  • Latex. This eco-friendly (only when it’s all-natural latex) option conforms to the body like foam but adds more responsiveness, bounce, and spring to the mattress.
  • Adjustable. Adjust the mattress’s firmness and sometimes the temperature all with the power of air. Up, up, and away!

Best memory foam king-size mattress

Saatva Loom & Leaf Memory Foam Mattress

  • Price: $$$
  • Type: memory foam
  • Height: 12 inches

The Loom & Leaf features three layers of foam, including a cooling gel top layer, premium memory foam transition layer, and high-density foam support core. It’s encased in a quilted organic cotton cover.

Saatva is known for their high quality mattresses, and this one doesn’t disappoint.

All their foams are CertiPUR-US certified, meaning they’re free of harmful chemicals. This model also comes in a plush firm (medium-firm) or firm options. Both contour well and have the kind of breathability that reduces overheating.

The Loom & Leaf includes a 180-night sleep trial, 15-year warranty, and white glove delivery, bringing it to your room of choice.

Best split king mattress

Saatva Solaire Mattress

  • Price: $$$
  • Type: adjustable
  • Height: 13.5 inches

Customized luxury starts here. Seriously, couples who cannot get comfortable will appreciate the ability to adjust their side of the bed, from the firmness to the incline.

Each side of the Solaire has its own air chamber and control. Pump it up, let it out, change the incline, and your partner will never know the difference. Needless to say, it works with an adjustable bed frame.

Saatva offers free mattress removal and setup, something that doesn’t come with every mattress. Sleepers find the Solaire to be incredibly comfortable, especially for couples. There’s no bickering about what kind of bed to buy when you can customize your side.

The Solaire features a 180-night sleep trial, free white glove delivery (yes!), and a 25-year warranty.

Best king-size mattress for back pain

Helix Midnight LUXE

  • Price: $$$
  • Type: hybrid
  • Height: 14 inches

The LUXE’s zoned lumbar support contours to the back, providing support at low pressure points and cushioning at high pressure points. It’s specifically designed for people who toss and turn, which is perfect if back pain keeps you from getting comfortable at night.

Sleepers report that the LUXE is true to its medium-firm rating, offering a balance between softness and support. Back sleepers who like a little cushioning will appreciate the extra plushness of the pillow top.

The lumbar support does well for side sleepers, yet it’s firm enough that the hips of stomach sleepers won’t sink into the mattress. Overall, it’s a good option for couples who struggle with comfort or back pain.

The Helix Midnight LUXE comes with a 100-night sleep trial, 15-year limited warranty, and free shipping within the United States.

Best king-size innerspring mattress

The WinkBed

  • Price: $$
  • Type: hybrid (almost innerspring)
  • Height: 14.5 inches

This isn’t your grandma’s innerspring mattress, because technology. While we’re calling this an innerspring mattress, it’s technically a hybrid. If a mattress has at least 2 inches of foam on top of the coils, it’s in hybrid territory.

Still the WinkBed’s single layer of cushioning foam makes it function much like a very comfortable, plush innerspring.

A cushy, quilted Euro pillow top and cooling gel-infused foam cover the pocketed coils. The coils relieve pressure and bring springiness to the mattress. Extra edge support keeps you from rolling off of the mattress and enhances durability.

Sleepers who like innerspring mattresses typically love the WinkBed. It tends to run a little on the firm side of medium-firm, but that’s pretty common for hybrids with few cushioning layers.

The Winkbed includes a 120-night sleep trial, lifetime warranty, and free shipping and returns.

Best hybrid king-size mattress

Brooklyn Bedding Aurora Hybrid

  • Price: $$$
  • Type: hybrid
  • Height: 13 inches

Five layers — four foam, one coil — come together in one of the best hybrids around. You can purchase it in three different firmnesses, giving you some customization options.

The Aurora also features several layers of foam with cooling features. A phase change foam, which becomes more liquid as it absorbs heat, transfers heat to a copper-infused foam layer that moves heat further away from the body.

The foams contour to the body while the pocketed coils continue pressure relief in high-pressure areas. Sleepers describe this mattress as “plush pressure relief,” even in the firm model. It’s gentler on the body than many hybrids, offering an excellent balance between foam contouring and coil support.

The Aurora Hybrid comes with a 120-night sleep trial, 10-year warranty, and free shipping in the lower 48 states.

Best value king-size mattress

Tuft & Needle Mint

  • Price: $$
  • Type: memory foam
  • Height: 12 inches

The Tuft & Needle Mint offers comfort that feels well beyond its price point. Three foam layers combine for a good balance of support and cushioning, making it a good option for all sleep positions.

The T&N adaptive foam is highly responsive, so you don’t ever feel stuck. This mattress also features cooling graphite and gel bead technology to suck up that extra heat and prevent overheating.

Sleepers consistently find that the Mint strikes the right balance between price and comfort. It also caters well to couples with different preferred sleep positions. Plus it’s made of eco-friendly certified foams.

The Mint comes with a 100-night sleep trial, a 10-year limited warranty, and free returns and shipping.

Best latex king-size mattress

Idle Latex Hybrid

  • Price: $$$
  • Type: latex hybrid
  • Height: 13 inches

Latex mattresses are the most eco-friendly sleep options on the market. And this one ranks high on sustainability, with certified organic cotton, wool, and latex. The Idle comes in many varieties, including a Dunlop or Talalay latex option.

Dunlop or Talalay, you say? That’s the type of latex, or more precisely, the method used to make the latex. Dunlop has a denser structure, creating a firmer mattress. Talalay, is more aerated, so the resulting latex is spongier and springier.

You can choose either type of latex, plus pick the firmness level, including a flippable model with a different firmness on either side of the mattress.

Sleepers report great cushioning and contouring with a little bit of bounce from the coils and latex. Sleepers of all sleep positions could find comfort on this model. However, it’s not plush, so strict side sleepers may not get the pressure relief they need.

The Idle includes one of the most impressive sleep trials at a full 18-months, a lifetime warranty, and free shipping and returns.

Best king-size mattress for stomach sleepers

Leesa Original Mattress

  • Price: $$
  • Type: memory foam
  • Height: 10 inches

The Leesa Original Mattress features an all-foam structure with a memory foam transition layer for extra pressure relief. The foams also absorb motion. If you have a restless partner, you’re less likely to get disturbed.

The foam combo offers a firmer feel than many other all-foam mattresses, which can help prevent the hips of stomach sleepers from sinking too deeply into the mattress and putting extra pressure on the lower back. The Leesa is also a good option for back sleepers who prefer firmer support.

This one includes a 100-night sleep trial, free delivery, and a 10-year warranty.

Best king-size cooling mattress

Purple Hybrid

  • Price: $$
  • Type: hybrid
  • Height: 11 Inches

The Purple Hybrid features Purple’s spongy, hyper-elastic gel grid. This 2-inch top layer lets heat and moisture move away from the body and out of the mattress, which helps keep you cool. (It works so well that you may need extra blankets and flannel sheets in the cold winter months.)

But cool sleep experience aside, this mattress also comes with excellent cushioning and contouring. Side and back sleepers will appreciate how well the Purple grid adjusts to their unique curves. However, the pocketed coils offer a bit more support than the Purple Original’s foam core.

Sleepers, especially hot sleepers, love the Purple Hybrid. The consensus seems to be that the grid’s feel takes time to get used to. But once you do, it’s hard to sleep on anything else.

The Purple Hybrid includes a 100-night sleep trial, free shipping and returns, and a 10-year warranty.

Best luxury king-size mattress

Brentwood Home Oceano Luxury Hybrid Mattress

  • Price: $$
  • Type: hybrid
  • Height: 14 inches

Oh, the heavenly luxury of nine layers of mattress. The Oceano features a coil-on-coil support system. That means there’s a layer of micro coils on top of a coil support core. The comfort layers are made of organic cotton and wool over a layer of plant-based memory foam.

All those coils target high-pressure areas around the shoulders and hips while supporting the low-pressure areas of the lower back, knees, and neck/head. The cotton and wool are certified organic, while the plant-based foam is free of harmful chemicals.

Wool and cotton do a good job of wicking away heat and moisture, leaving sleepers comfortable. Back sleepers and those who frequently change positions are likely to find this model a comfortable fit.

The Oceano features a 1-year sleep trial, 25-year limited warranty, and free shipping and returns.

Best king-size mattress under $600

The Allswell

  • Price: $
  • Type: hybrid
  • Height: 10 inches

The Allswell is a starter hybrid mattress that provides good comfort at an entry-level price. Copper and charcoal-infused memory foam top layers absorb heat, transferring it away from the sleeper. (Copper is also used to reduce microbial growth. Which is awesome and also gross.)

Sleepers appreciate the true medium feel of this mattress. It’s a great option for back and side sleepers on a budget. Stomach sleepers may find it a little soft, but for the price, it’s hard to beat.

The Allswell includes a 100-night sleep trial, 10-year warranty, and free ground shipping.

Best king-size mattress for people over 200 pounds

Big Fig

  • Price: $$
  • Type: hybrid
  • Height: 13 inches

The Big Fig is designed specifically for people over 230 pounds. It can hold a maximum weight load of 1,000 pounds, so 500 pounds per partner. It combines a firmer design with four layers of foam over a pocketed coil support core.

The gel, latex foam, and polyfoams contour to the body, enhance breathability, and relieve pressure. Their densities help support larger bodies.

The latex gives the Big Fig a little more bounce, so bodies don’t get stuck in the foams. Finally, high-flex, 15-gauge coils relieve pressure but offer firmer support that helps prevent early breakdown or body indentations.

This mattress is truly designed for bodies over 230+ pounds with dense foams and high-flex coils. It cools, cushions, and supports with materials that don’t break down under higher weights. However, if you’re under 230, chances are this model will feel too firm.

The Big Fig includes a 120-night sleep trial, 20-year warranty, and free shipping and returns.

Best king-size mattress for side sleepers

Nolah Evolution 15

  • Price: $$$
  • Type: hybrid
  • Height: 15

Side sleepers won’t suffer from overheating, which can be a serious sleep disruptor for anyone. The Nolah Evolution 15 offers a quilted, plush euro-top designed to draw heat away from the body. Heat absorption continues through a graphite foam layer and escapes out a vented heat escape gusset. See, super cool sleeping for side sleepers.

But, for side sleepers, it’s the patented tri-zoned support coils that will make your hips and shoulders happy. The three zones relieve pressure through the shoulders and hips but support the waist, head, and knees, so you don’t wake up sore in the morning.

The Nolah Evolution 15 includes a 120-night sleep trial, free shipping, and a lifetime warranty.

Best eco-friendly king-size mattress

EcoTerra Hybrid Latex Mattress

  • Price: $$
  • Type: latex hybrid
  • Height: 11 inches

Our eco-friendly pick stacks up several third-party certifications, including certified organic latex, wool, cotton, and upcycled steel coils. But that wouldn’t mean anything if it weren’t also comfortable, which it is.

An organic cotton cover quilted to organic wool wicks away moisture and cushions the body. The natural latex layer offers contouring, responsiveness, and cushioning over the highly-responsive upcycled coils.

The price is reasonably affordable for an eco-friendly mattress of any material, let alone latex.

The EcoTerra works well for those who prefer pressure relief without deep contouring. The latex/coil combination doesn’t trap heat, so sleepers stay cool and comfortable. FYI, this tends to be a bouncy mattress that may not work well for restless sleepers.

The EcoTerra includes a 90-night sleep trial, 15-year warranty, and free shipping and returns.

Best king-size mattress for couples

Sleep Number c4 360 Smart Bed

  • Price: $$$
  • Type: adjustable
  • Height: 12 inches

If you want a premium mattress that lets you and your partner both get comfortable no matter what, the 350 c4 will do it. The bed is loaded with sensors that monitor your movements, adjusting the firmness of the bed as you move, so you get the right pressure relief even as your sleep position changes.

You can control the firmness level on each side separately, including raising or lowering your head or feet. The c4 also includes a heated feet area for those who get chilled. This mattress offers the ultimate in customization, technology, and individual comfort, but you pay for it.

Couples love the 350 c4, especially those who have different sleep preferences and need help falling and staying asleep. This mattress is an investment, but for some, it’s worth the money for the sleep quality.

The 350 c4 includes a 100-night sleep trial, 15-year warranty, and home delivery that includes set up by authorized technicians.