Top 10 Best King Size Mattress 2020 Reviews

Welcome to the Best King Size Mattress Reviews feature. The king-size mattress is one of the most popular in buyers because it is larger than many other sizes and ideal for couples and comfortable sleeping. It provides sleepers with plenty of room to stretch out their legs and sufficient space to keep partners comfortable. The mattress you sleep on can have tremendous impact on how well you sleep at night so it is important to choose a good one.

With king-size mattresses, the more expensive ones are not necessarily better, but many cheap ones are not made of quality materials. We are here to look at some of the best king size mattresses that come with excellent qualities. The good king size mattress can last you many years.

Comparison of Table

Best King Size Mattress

Below is the list of Best King Size Mattress to buy in 2020.

#TUFT & NEEDLE King Mattress

If you are looking for king size mattress that fits all kinds of frames, comfortable and reasonably priced, the TUFT & NEEDLE King Mattress is a great choice for you.  This king size mattress is available in Twin, Twin XL, Queen, Full and California King.

It is constructed of 7 inches of support foam certified to be free of PBDEs, phthalates, formaldehyde, heavy metals and other harmful substances. On top, the layer is a 3-inch layer of adaptative foam for your comfort.

To keep you sleeping cool, this adaptative foam contains the mix of graphite and gel beads for better temperature regulation. This assure comfort all year even during summer nights. It is not too soft but not too hard either.

This USA made mattress is CertiPUR-US-certified foam. This king size mattress comes with a 100-night sleep trial and a 10-year warranty. Overall, this king size mattress carries a trio of certifications to protect customer safety and environment.

TUFT & NEEDLE King Mattress | Bed in a Box | Utilizing Proprietary T&N Adaptive Foam | Sleeps Cooler with More Pressure Relief & Support Than Memory Foam | Non-Toxic Certified | 100-Night Sleep Trial | 10-Year Warranty

#Features

  • Made with Tuft and Needle proprietary foam
  • Two-layer blended foam
  • Pressure Relief
  • Bouncy yet supportive feel
  • CertiPUR-US-certified foam
  • 100-night sleep trial
  • 10-year warranty
  • Available in different sizes

PROS:
  • Excellent quality.
  • Comfortable.
  • Great price.

CONS:
  • No cons.

#Classic Brands Top Innerspring King Mattress

If you want firm but comfortable mattress without spending a large amount of money, the Classic Brands Serena Pillow Top Innerspring King Mattress is a great choice for you.

It is constructed with tempered steel wrapped innerspring coils that enhance the mattress’s durability and longevity. This 10-inch mattress has a right number of inner springs to give you support and comfort.

This king size mattress has two layers , 2-inch soft comfort foam that provides you a plush sleeping surface and 8-inch layer of wrapped inner springs that distributes body weight and adds to the comfort.

If you are a fan of the spring and support offered by the coiled mattress, this king size mattress delivers. The bed has a medium-firm feel. Both the layers of this mattress are CertiPUR US Certified.

The company offers a 10-year limited warranty. Overall, this king size mattress is best for under $500.

Classic Brands Serena Pillow Top Innerspring 10-Inch Mattress, King

#Features

  • Made with pocketed tempered steel coils
  • 2-inches Soft comfort foam
  • 8-inches Wrapped Innerspring
  • Medium-Firm Feel
  • Minimal Motion Transfer
  • CertiPUR-US-certified foam
  • 10-year warranty
  • Available in different sizes

PROS:
  • Looks great.
  • All sleeping styles.
  • Comfortable.

CONS:
  • No cons.

#Casper Sleep Essential 8.5″ King Mattress

If you want to experience the best kind of sleep which is truly relaxing and rejuvenating, the Casper sleep king mattress is worth considering. This king size mattress is available in Twin, Twin XL, Full, Queen and California King sizes.

It is constructed with 3 layers of foam are as follow: soft open cell foam on top, contouring memory foam middle layer, and a supportive base layer. The top layer of open-cell foam helps to dissipate heat and keeps you sleeping cooler while offering sufficient give to allow the shoulders and hips to settle into the mattress.

It is a medium-firm mattress that means it is a perfect firmness level between super plush and super firm. Due to its medium firmness, the king mattress is compatible with all the sleeping positions.

This king size mattress has an excellent ability of motion isolations, and hence you are ensured of getting an undisturbed sleep. It offers a 100-night trial and a 10-year warranty.

Overall, Casper Essential King Mattress is perfect for side sleepers.

Casper Sleep Essential Mattress, King 8.5'

#Features

  • 3-layer of construction
  • Breathable open-cell foams
  • Visco-elastic layer relieves pressure on the shoulders
  • CertiPUR-US-certified foam
  • Medium Firm
  • Washable cover
  • Available in different sizes
  • 100-night trial
  • 10-year warranty

PROS:
  • Perfect for side slippers.
  • Easy to set up.
  • Very supportive.

CONS:
  • No cons.

#Amerisleep AS3 12″ King Memory Foam Mattress 

The AS3 is a middle-range mattress that has a supportive plush level of firmness which would be suitable for any sort of sleeper. Amerisleep manufactures its foam using VPF process that is the eco-friendliest way to make foam in the world.

It comes with a 3-inch layer of memory foam which recovers its shape faster than regular foam. This memory foam takes 4 seconds of bounce back time which is much faster than traditional bounce back time.

There is a 2-inches layer of high-density poly-foam that supports the soft memory foam above and the firm base below it. The base of the king mattress is made with 7 inches of high-density polyfoam which gives mattress the final touch of durable support.

The Bio-Pur extra breathable cooling layer that is 5 times more breathable than the normal memory foam that is used in mattresses. It has an advanced open-cell structure that keeps the heat away while you sleeping. This layer would help to keep you cool in sleep, adjust the temperature of the mattress and won’t heat up while in use.

Amerisleep AS3 12' Memory Foam Mattress (King)

#Features

  • Open-cell structure
  • Environmentally-friendly
  • 3 layers of foam
  • The bio-core foam support layer
  • Bouncing back in 4 seconds

PROS:
  • Excellent quality.
  • Comfortable.
  • Great customer service.

CONS:
  • Extremely firm.

#Olee Sleep Omega Hybrid Gel Infused Memory Foam King Mattress

If you’re looking for a gel king mattress that can be comfortable like a luxurious mattress, this Olee Sleep Hybrid Gel bed is great choice for you. This king mattress available in Twin, Full and Queen sizes.

It has a 5-layer construction that gives this mattress a lot of support. The top 1-inch layer made of gel memory foam that keeps your body cool while you sleeping. The next 1-inch dura foam layer provides you elastic support while the next 1-inch high-density foam layer is extracted from egg carton adds to the comfort.

There is a 1-inch support base made of high-density foams that adds to the support and durability of the mattress. The 7.5-inch pocketed springs, it works against any motion and prevents sagging.

This king mattress can be described as a medium-firm. The mattress never sinks more than two inches. The cover of this mattress is soft and comfy.

Olee Sleep 10 inch Omega Hybrid Gel Infused Memory Foam and Pocket Spring Mattress  (King)

#Features

  • 5-layer of construction
  • 7.5-inch pocketed springs
  • Fit on any types of frames
  • Soft Cover
  • Available in different sizes

PROS:
  • Super comfortable.
  • Soft.
  • Great price.

CONS:
  • Suport is not too good.

#Snuggle-Pedic King Mattress

This king size mattress from Snuggle-Pedic is perfect for side, back and stomach sleepers. It is available in Twin, Twin XL, Queen, Full and California King sizes.

The 10-inch mattress constructed with 2 layers. The top layer is a 3-inch high-density snuggle-flex, which is an extra buoyant memory foam comfort layer. The bottom layer is 7-inch high-density polyurethane foam with more supportive channels.

The patented airflow transfer system work as it assumed to work by creating 100 times more breathability. This king mattress comes with extra thick and luxurious Kool-Flow Bamboo cover.

This memory foam king mattress is made in the USA and CertiPUR-US certified. It comes with a 4-month sleep trial and the company offers a 20-years warranty.

Snuggle-Pedic Mattress That Breathes - Patented Airflow Transfer System, Kool-Flow Ultra-Luxury Bamboo Cover, USA Orthopedic Flex-Support Memory Foam, 4-Month Sleep Trial & 20-Year Warranty (King)

#Features

  • 2-layer of construction
  • Flex Support Technology
  • Hypoallergenic and Dust Mite Resistant
  • CertiPUR-US-certified foam
  • Kool-Flow Extra Breathable Micro-Vented Cover
  • Available in different sizes
  • 120-night trial
  • 20-year warranty
  • Free customization

PROS:
  • Comfortable.
  • Excellent quality.
  • Great customer service.

CONS:
  • Expensive.

#Sleep Master iCoil 13 Inch Top Spring King Mattress

This king size mattress from zinus gives you unmatched relaxation and comfort. It is constructed with hundreds of independently pocketed coils to minimize motion transfer. It is available in queen and full sizes.

The sleep master mattress has a dual-layered structure including the 2-inches pressure-relieving foam layer and quilted foam cover of 8 inches that encases steel coils. Both layers combine to give you an outstanding sleeping experience.

Some steel coils are working efficiently to provide you comfortable and undisturbed sleeping hours. The pillow-top is soft enough for most users, but if you are looking for an extra-plush feeling, you might require to add a separate topper.

Both layers are made of high-quality CertiPUR-US Certified foam to assure optimum performance and durability. Once delivered, you have to open a box, take out the bed and unfold, as easy as you can read it.

The company offers 10-year warranty on the mattress.

Sleep Master iCoil 13 Inch Euro Top Spring Mattress and BiFold Box Spring Set, King

#Features

  • Dual-layer structure
  • Hundreds of independent iCoils
  • Patented Technology
  • CertiPUR-US Certified
  • BiFold Box Spring
  • Easy mobility
  • Available in different sizes
  • 10-year warranty

PROS:
  • Easy to setup.
  • Excellent quality.
  • Great customer support.

CONS:
  • Some customer says it is hard.

#Purple California King Size Mattress

If you’re looking for the mattress that will relieve back pain, the Purple Mattress great choice for you. The beds utilize patent material called Hyper-Elastic Polymer which is different from memory foam.

It is made from non-toxic and food-grade material. On top, there is a 2-inches patented Hyper-Elastic Polymer that is responsive and flexible. In the middle, you will find a 2.5-inch layer that acts as a transition layer and adds to the support. As the base, the mattress uses the 4-inch two-pound polyurethane foam layer.

The open grid design makes this king mattress temperature neutral, meaning it will not trap or hold in body heat. This king size mattress uses sleep science and other leading technologies to stop any movements that can disturb or wake you.

It is CertiPUR-US­ Certified mattress. This king mattress is comfortable enough to sleep on without feeling pain from the hardware, incision, or injury. The company offers a 100-night trial.

Purple California Hyper-Elastic Polymer King Size Mattress, White

#Features

  • 3-layer structure
  • Open grid design
  • CertiPUR-US Certified
  • Free Air Flow technology
  • Available in different sizes
  • 100-night trial

PROS:
  • Soft.
  • Comfortable.
  • Best for back pain.

CONS:
  • Heavy.

#Sweetnight King Size Mattress

If you are looking for affordable king size mattress then Sweetlight mattress is the perfect choice for you. This mattress is excellent for both users who are looking for a firm or plush mattress. One side is firm and other side is plush.

This king size mattress made of 4 layers which comprise a 2-inch gel-infused memory foam top which is liable for making the mattress feel cloudy, 1-inch ventilated comfort foam, a 5-inch comfort foam middle layer that delivers balance and pressure relief, and 3-inch high-density base support foam.

It is comfortable, durable classy and flippable.The Certi-PUR US Certified foam constructed without harmful substances like mercury, or other heavy metals. The cover is made of breathable Rayon cotton fabric.

The company offers a 10-year warranty. It is available in Twin, Full and Queen sizes.

King Mattress, Sweetnight King Size Mattress- 10 Inch Gel Memory Foam Mattresses with CertiPUR-US Certified for Back Pain Relief/Motion Isolation&Cool Sleep, Flippable Comfort from Soft to Medium Firm

#Features

  • Zoned Gel Memory Foam
  • 4-layer structure
  • Two Sides Available
  • Breathable Layers
  • CertiPUR-US Certified
  • Available in different sizes
  • 10 year warranty

PROS:
  • Soft.
  • Great customer service.
  • Affordable.

CONS:
  • No cons.

#Leesa 10″ King Memory Foam Mattress

This 10-inch kind mattress from Leesa is thick and such extra thickness provides a luxurious look. It consists of 3 layers. This mattress is available in all sizes.

The top layer has 2 inches of Avena foam to provide cooling, breathability, and comfort. The middle layer has 2 inch of contouring memory foam that relieves pressure. The bottom layer has 6 inch of supportive high-density foam.

This king size mattress promotes great breathability and maximum airflow along with a perfect balance between sink and bounce. It offers body contouring and cooling, ensuring the great sleep night after night.

This king size memory foam is made in the U.S. The manufacturer offers a 100-night trial and it is backed by the full refund policy. It comes with a 10-year warranty with replacement.

Leesa 10' Memory Foam Mattress in a Box, Luxury CertiPUR-US Certified 3 Layer Foam Construction, King, Gray & White

#Features

  • 3 layer construction
  • Body contouring and pressure-relieving
  • Microcell structure technology
  • 100-night trial
  • 10-year warranty
  • Available in different sizes

PROS:
  • Looks great.
  • Increased breathability and airflow.
  • Comfortable.

CONS:
  • Expensive.

Buying Guide: Best King Size Mattress

Here, we have important factors to consider when buying the best king size mattress.

Material: The beds come in all shapes and sizes. The most common materials are coils, memory foams, polyfoams, and latex. Most coil mattresses don’t use the same type of springs your grandparents grew up on. It uses the pocket coil that keeps the bounce while isolating motion. There are a lot of various types of foams out there, but the 2 common are memory foam and polyfoam. The memory foams are going to be slow responding as well as contour tightly to curves to alleviate pressure, while polyfoams have more of a fast response that helps wipe away the strain. The latex is a type of rubber foam. There are mainly 2 types- Dunlop and Talalay latex. They have a very similar feel and quick responsiveness but differ in construction.

Firmness Level and Comfort: There are many features that play a role in how comfortable a mattress will be such as firmness level, coolness, breathability. If a mattress has enough in-flow of air and gel-infused top layer, such a mattress will ensure that you will remain cool at all times during the year despite the season. The firmness of your mattress is going to influence how you sleep. Beds are normally categorized as Soft, Medium, or Firm, with some variation in between. You should check out the number of layers which the mattress has.

Special Features: To get a king-sized mattress that stands out of the many options available, you should make sure the mattress you are purchasing has some special features like patented fabric covers, CertiPUR-US Certification, odor absorption, memory foams for back support, hybrids and hypoallergenic properties. These features will help you to know whether the mattress you are purchasing is actually worth it or better than another.

Trial Period: Most brands offer some sort of trial period. These trials allow buyers to try these beds out in their homes within the given time and if they’re not satisfied with their shopping they can either return their mattress or exchange it for a new model.

Warranty: The companies offer differing warranties, some even give lifetime protection. Warranties cover manufacturing errors or abnormal wear of the product. If damage occurs within the time of the warranty, the company will usually ship their customers new mattress.

Conclusion

If you are looking for a king-size mattress, make sure your bedroom can support the bed. When buying king size mattress you should always read reviews from others who have bought the mattress and used it for a vital amount of time. You want to think about your preferences, such as sleep position and any special conditions that might affect your sleep quality. You can seek out mattress companies who offer the trial sleep period where you can try the mattress and send it back if you are not happy with it. The good king-size mattress will last you decade or longer, so research the reviews carefully, it is worth your time. We hope you found the Best King Size Mattress for your needs.

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