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10 Best King Size Mattress 2020

The Best King Size Mattress
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A king size mattress that’s fit for a king. Sure, it may be a pain to fit through the doorway into your bedroom but it’s going to be worth it! Our list can help you find the best king size mattress for a comfy, undisturbed, peaceful sleep.

We always thought peaceful sleep and a clear conscious was something money couldn’t buy. Turns out, we were wrong.

It IS possible to find a super large mattress that’s both high quality and priced just right for your budget! Don’t believe us? Keep reading to be proven wrong in the nicest way.

The Best King Size Mattress is…

Well, it depends on you. To get a spot on our list, each mattress had to be more than good so just because it’s not the best of the best doesn’t mean it’s not worth a shot!

Best OverallNolah Signature King Mattress, for incredible versatility and comfort for all sleeping positions at a very reasonable price.

Best Eco-Friendly AWARA Latex Hybrid King Mattress, for sustainable materials, organic certifications, and a great bounce.

Best for Big Figures The Big Fig King Mattress, for a sturdy design that doesn’t sag and yet also doesn’t compromise cushioning comfort.

Best Budget The Nectar King Mattress, for an affordable price, year-long trial period, and compatibility with all bed frame types.

When scrolling through our list, make sure you pay attention to what sleeping positions each mattress is good for. That’s the key to picking the best king size mattress for you.

Why Buy a King Size Mattress?

If you’re already convinced you need a king size mattress, keep on reading. If not, here are all the reasons why it’s an excellent idea that you won’t regret:

  • That moment when you’re in the hotel room and just fall face-first into the huge bed to give your best starfish impression? You can do that every day now.
  • More space. Don’t underestimate that. It’s enough to create some space between you and your partner when feuding… and it’s more than enough space for the amorous make-up activities that follow.
  • Your sleeping position is finally catered for! Large king size mattresses can often be split down the middle (internally) so that you can enjoy a medium-firm feel while your partner sinks like the Titanic into foamy heaven.
  • More space suitable for bigger bodies. King mattresses are wider, sure, but they’re longer too for extra tall people. You’ll also find that they’re built stronger and can hold larger weights.

Buying a new mattress is also a chance to get some luxury in your life. You spend 1/3 of your entire life in bed. Don’t waste it on a bad mattress that’s a bit too small just because you wanted to save money!

Things You Should Know Before You Buy!

Hold your horses. Before we delve into the best of the best, here are some key things you should know. The wrong mattress can have some significant side effects on your health, so take note!

How Big is A King Size Mattress?

A king size mattress is 76 inches wide by 80 inches long, which is just a couple of inches shorter than putting 2 twin XL mattresses together.

To give you a little perspective:

  • Full: 54 by 75 inches.
  • Queen: 60 by 80 inches.
  • King: 76 by 80 inches.
  • Cal King: 72 by 84 inches (many people mistakenly think it’s as wide as a king mattress, but it isn’t. It’s taller but thinner).

To fill a king-size mattress, you and your partner would need to be something like 2 meters tall (6 foot 8 inches) and be as wide laying down as a single bed. That’s pretty wide.

Know more about different mattress sizes, click here.

What Mattress Types do King Size Mattresses Come in?

This is the important part. Different mattress types are better for different sleepers and sleeping positions! Don’t worry if this is going over your head a little. We’ve made it easy for you by letting you know what each mattress is suitable for in our mini-reviews below.

King mattresses can be:

Innerspring – at a basic level, an innerspring mattress is full of metal coils surrounded by padding and sealed in the mattress case. Of course, the industry has developed a lot over the years and you’ll now find all sorts of coil systems, metal types and spring layers used by mattress makers to create a better feel. These mattresses tend to offer a good bounce but can be noisy, so look for noise insulating foam layers too.

Foam (Memory Foam) – foam layers, usually a mid-layer and top layer at least, remember your body shape and let you sink into your mattress. This type tends to offer the best support for side sleepers, although there are firm foams that can help back and stomach sleepers too.

Latex – a natural product made from rubber that’s entirely biodegradable! It’s great as a more resistant foamy feel and often combined with other natural materials to create eco-friendly mattresses, if you’re into that kind of thing.

Hybrid – this is the most common type of king mattress or any large mattress size. To keep the large surface springy and to prevent natural sagging at the center, a mix of foam, latex, and innerspring layers are used to create a sturdier mattress.

Know more about different mattress types, click here.

How Can I Clean This Gigantic Mattress Size?

Because king size mattresses are so huge, you want to keep the cleaning to the minimum. Double up on mattress sheets that you can wash if something is spilled on it, and then all you’ll need to do is spot clean if the actual mattress beneath gets dirty. A sponge, hot water and washing powder are all you need to scrub out stains.

For odors and all-over cleaning, you can use baking soda. Sprinkle it over the mattress to let it absorb odors then get ready with the vacuum cleaner. It might be easier on your back to lift the mattress vertically against a wall for this.

How Much Should I Expect to Pay for a King Size Mattress?

Price points vary widely but you should always expect to pay more for a king mattress than a smaller size!

The cheapest king size mattresses on our list are around $800.

The most expensive king size mattresses are around $3000.

The average is about $1900.

All these price averages are at the time of writing this article – don’t expect them to stay the same! As eco-materials become more popular and new mattress types are developed, prices could go either up or down.

Know more about other mattresses we reviewed (over 60), click here

Delivery AND Returns Are Important to Check!

Finally, the last thing you should know about buying the best king size mattress online is… sometimes you can’t tell if it’s the best or not until you’ve spent a few nights sleeping on it. That’s why checking the details of the trial policy is especially important. Read our reviews below to find out whether returns are accepted and how delivery is dealt with by each brand.

10 Best King Size Mattress 2020

1. Nolah Signature 12 King Mattress – Best Overall

Nolah Signature 12 King Mattress

  • Mattress Type: Foam
  • Best for: Stomach, back, and side sleepers
  • Trial Period: 120 nights
  • Delivery: Free shipping and returns
  • Warranty: Lifetime

The best thing about this king size mattress is the versatility. One side is as soft and comforting as a baby’s bottom the other is as firm as, well, a firm mattress. The two-sided design allows you to pick what feels best and change things up if your sleeping position changes over the years.

It’s a 12-inch foam mattress with an organic cotton cover. The firm side has a thin layer of cooling AirFoam between you and the high-density core, while the soft side (which is a medium-soft and still suitable for back sleepers) has a thicker layer of AirFoam and extra high resilience foam layer.

We adore this mattress because it’s clever. It might not have any different layers compared to the other foam mattresses on our list, but it’s just designed in a way that’s out of the box. It’s resourceful, flexible and genius with a modest price tag. The lifetime warranty, free delivery, and 120-night trial are all just the icing on the cake.

2. AWARA Latex Hybrid King Size Mattress – Best Eco-Friendly Latex Mattress


  • Mattress Type: Hybrid (innerspring + latex)
  • Best for: Eco-conscious stomach and back sleepers
  • Trial Period: 365 nights
  • Delivery: Free shipping and returns
  • Warranty: Lifetime

AWARA is a king size bed made for eco-warriors. It’s a hybrid design of natural, certified organic latex and individually wrapped innerspring coils. The latex is cushiony and soft with a little bounce – it’s a great top layer as it gently curves to the contours of your back – but if you’re a side sleeper you won’t find it as supportive as a foam mattress. The springs underneath are very quiet thanks to being individually pocketed and provide even more bounce. This makes the mattress great for nocturnal activities. Wink wink.

The real attraction to this mattress is the eco-friendliness. The moisture-wicking quilted cotton wool blend cover, natural Dunlop latex, and materials holding the coil system in place are all organic and good for the environment. The springs can be recycled while the latex and fabric are easy to decompose or reuse.

If you’re used to innerspring mattresses this will feel like heaven. If foam has been your mattress type of choice in the past, we’d suggest you pick up AWARA’s matching mattress topper for a little extra cushioning.

3. The Big Fig King Size Mattress – Best for Big Figures

The Big Fig King Size Mattress

  • Mattress Type: Hybrid (foam + latex foam + innerspring)
  • Best for: Big-bodied sleepers
  • Trial Period: 120 nights
  • Delivery: Free shipping and returns
  • Warranty: 20 years

The Big Fig mattress is designed for bigger bodies, so if you’re looking for the best king size mattress to suit your big figure, this is the one for you. It’s a hybrid with a solid and supportive innerspring base (no sagging) and deep layers of memory foam and latex to let you feel the cushioning softness as you sink into it.

It’s designed for all the problems you face, including staying cool at night and shifting around with causing spring squeaks. We love the lasting comfort that it provides. There’s a tendency to focus on creating a really strong foundation in mattresses designed for larger people, which creates really firm mattresses. But the Big Fig is great for side sleepers and back sleepers alike thanks to the foam and latex cushions.

What we love most is that even with all these added design features, it’s still priced no higher than standard mattresses on our list!

4. The Nectar King Memory Foam Mattress – Best Budget

The Nectar King Memory Foam Mattress

  • Mattress Type: Memory foam
  • Best for: Side sleepers and back sleepers
  • Trial Period: 365 nights
  • Delivery: Free shipping and returns
  • Warranty: Lifetime

This is one of the budget buy king mattresses on our list. At under $1k (fingers-crossed it stays that way, but double-check the current price by clicking below) it’s incredibly affordable compared to other foam king mattresses. Plus lifetime warranty, free shipping, and a year-long trial, it’s one of the best to try on our list with very little to lose (apart from your time, of course).

From top to bottom you have a cooling cover, extra cooling quilted gel memory foam, body-adaptive core memory foam, breathable base layer, and the gripping mattress. The gripping cover at the bottom stops it sliding all around your bed frame. It’s compatible with all bed frames, including adjustable ones.

It has a medium firmness for a memory foam mattress which means it’s passable for those who like to sleep on their backs as well as their sides.

Besides that, there’s very little to say about this mattress. It’s simple, affordable and has no fancy extra features to point out. You get what you pay for!

5. PlushBeds Botanical Bliss King Size Organic Latex Mattress

PlushBeds Botanical Bliss King Size Organic Latex Mattress

  • Mattress Type: Latex
  • Best for: Side and back sleepers with allergies
  • Trial Period: 100 nights
  • Delivery: Free shipping and returns
  • Warranty: 25 years

The Botanical Bliss mattress is a multi-certified organic latex mattress that’s suited to both side and back sleepers who need a little support. Besides latex, there’s a wool layer just beneath the organic cotton cover to regulate your temperature and add some breathability to the mattress.

Even with the wool, this is a very cool mattress. It’s great for people who need the comfort of foam without the sticky hot feeling it gives you during the night. It’s completely silent to get on and off, plus doesn’t have any strange odors when you take it out of the box.

You can order this mattress as medium or firm and choose a height (9, 10 or 12 inches). We love that PlushBeds also offer a split king option, so you and your partner can have different firmness levels. Just bear in mind that it won’t be cheap!

That’s our biggest concern with this mattress. It’s on the expensive side and the warranty isn’t lifetime like many on our list.

6. The Puffy Lux King Mattress

The Puffy Lux King Mattress

  • Mattress Type: Foam
  • Best for: Side sleepers
  • Trial Period: 101 nights
  • Delivery: Free delivery and returns
  • Warranty: Lifetime

The Puffy Lux King mattress is foamy heaven for side sleepers (while Puffy state that it’s great for all sleeping positions, we know that firmer mattresses are better for stomach and back sleepers) with multi foam layers. There’s a firm core support level to keep your spine aligned, dual adapting cloud foam to hug your curves and a gel layer to keep you cool.

We loved that it’s compatible with all frame types – even adjustable ones – and that it’s designed, made assembled and sewn together in the great USA. Buying this mattress supports US workers and cuts down the carbon footprint a little.

What we weren’t so keen on was the lack of certifications. Puffy has researched for years to create their unique layers of foam that genuinely do wick away all that body heat overnight. But there’s no certification or test of any kind into the chemicals in that foam and how environmentally friendly it is. Besides the Oeko-Tex Standard 100 Certified mattress cover (that’s awesomely stain-resistant), there’s nothing. We’re not entirely sure it can be recycled either.

7. Casper Wave Original King Size Mattress

  • Mattress Type: Foam
  • Best for: Side sleepers
  • Trial Period: 100 nights
  • Delivery: Free shipping and returns
  • Warranty: 10 years

The Casper Wave Original (not the hybrid model which is the same but with steel coils added as an innerspring layer) is a multi-layer foam mattress that’s great for side sleepers. It has 4 foam layers and a wool casing that’s designed to wick away heat. This entire mattress top and outer layers are focused on keeping you cool as you sleep, which does make you wonder if the base foam layers are troublesome for hot sleepers…

At the base there’s targeted gel pods to keep your core aligned, then layers of breathable, pressure-relieving and soft comfort foam to keep you comfy.

We did like this mattress and it was ideal for stay cool while still enjoying the foam feeling… but it’s quite pricey! The feel is soft too – but you can bump it up to medium-soft by opting for the hybrid option. This adds a few hundred dollars to your total but it will be worth it if you’re a back sleeper.

Overall, quite nice but also quite expensive!

8. SleepEZ Select Sleep Organic

SleepEZ Select Sleep Organic

  • Mattress Type: Latex
  • Best for: Side and back sleepers with allergies
  • Trial Period: 90 nights
  • Delivery: Free delivery and $99 return fee
  • Warranty: 10 years

Offering both standard king and split king options, the SleepEZ Organic mattress is a mid-range priced natural latex mattress. If you’re attracted to the eco-friendly and chemical-free way of living but don’t have a large budget, this could be the option for you.

It’s made of entirely natural and certified latex layers that you can adjust and replace if it doesn’t feel quite right! The latex is harvested sustainably in Sri Lanka and is naturally hypoallergenic. This mattress will also deter dust mites. And just in case that wasn’t enough, each mattress purchase comes with 2 free latex pillows and a free mattress protector to help you protect from spills that could void the warranty.

Make sure you double-check the trial and returns policy at SleepEZ as it’s not as straightforward as other manufacturers. This is our only problem with this mattress and it’s why we wouldn’t recommend buying it unless you’ve got a good reason to believe that latex mattresses are ideal for you.

9. Purple Hyper-Elastic Polymer King Size Mattress

Purple Hyper-Elastic Polymer King Size Mattress

  • Mattress Type: Specialist foam
  • Best for: Back and side sleepers
  • Trial Period: 100 nights (official website) 30 days (through Amazon)
  • Delivery: Free shipping and returns
  • Warranty: 10 years (mattress cover is 2 years)

Purple is a mattress innovator with a unique way of creating mattresses. Although it’s a foam mattress, Purple is very particular about the construction and quality of their foam. If you need foam comfort but are worried about the environment and chemicals, you’ll be happy to hear that the hyper-elastic polymer is FDA-approved, CertiPUR-US certified and completely nontoxic.

Other stand-out features include free airflow tech (it won’t make you sweat), pressure equalization (it supports side sleepers), and motion isolation (you won’t wake up your partner in the middle of the night).

As for buying, you have 2 options both with pros and cons. If you buy directly from the Purple website, you get your 100 nights trial. If you buy through Amazon (who do stock the official mattress) you can get it cheaper as there’s less tax… but you only have the standard 30-day Amazon return policy. Either way, you still get free delivery and a 10-year warranty. Decisions, decisions…

10. Tuft & Needle Foam King Mattress

Tuft & Needle Foam King Mattress

  • Mattress Type: Foam
  • Best for: Side and back sleepers
  • Trial Period: 100 nights
  • Delivery: Free shipping and returns
  • Warranty: 10 years

Tuft & Needle’s king size foam mattress claims to be better than “outdated” memory foam and latex. It is better than memory foam, but latex? Well, it depends on you. This is a fab mattress for side and back sleepers while latex mattresses on our list (which aren’t outdated) tend to be a bit firmer and sometimes are suitable for stomach sleepers too.

The adaptive foam is a simple thick layer with a softer top layer. It’s currently the cheapest on our list and this is why. The benefit of such a simple design, however, is that it’s compatible with all bed frame types, including adjustable ones that lift and recline.

It’s not the best for bigger figures, so consider using your spare budget to purchase a mattress topper to go with it.

The returns, trial period and shipping policies are all standard and quite good. If you need a simple foam mattress and don’t have any night-time complaints from aching body parts, this could do the trick.

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