Best King Size Mattress [Review] in 2021
Last Updated on December 15, 2020
written by sleep expert Lauren Hall
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Mattresses play in integral part in our everyday lives, yet they remain so underrated. Our beds are incomplete without them. A mattress helps you maintain good health by keeping your sleeping posture and spine straight which is crucial for a good life. Without a mattress, you cannot imagine sleeping comfortably.
Today we bring you the best price king size mattresses you will find online. We have done the work, so you don’t have to. We have gathered some of the most unique king size mattresses that function great and don’t cost a lot at the same time. So, without wasting any more time, let’s dive in.
We’ve spent the time researching so you don’t have to:
Sleepedia's Pick of Best King Size Mattresses
Sweetnight King Plush Pillow Top Hybrid Mattress
Sweetnight brings you a king size mattress that is perfect for your back. It will help relieve the pain in your back and provide a great comfortable experience at the same time. The looks on the mattress are also great with the white design on top and the black side. You get motion isolation for an undisturbed sleep which is crucial. 3-zone pocketed spring provides great elasticity and the soft plush top enables a peaceful sleeping experience. The mattress is also CertiPUR US certified and contains no harmful chemicals and substances. The product comes well packaged and includes a 10-year guarantee inside.
Soft and plush
Elastic and comfortable
Only comes in one color
Molblly 14 Inch King Gel Memory Foam Mattress
Molblly brings you a great king size mattress that will be great for any pain in your back that you may be experiencing. The looks of the mattress are also amazing with the white top and purple sides. It looks super clean and the simplistic vibe feels perfect. The memory foam does an amazing job in conforming to the shape of your body and provides great comfort at the same time. The foam is certified by CertiPUR US and ships to you compressed and well packaged to reduce shipping costs. The build quality is amazing, and you will love what you get here. A 10-year warranty is also included.
14” memory foam
Comfortable and plush
Durable and well-built
Not ideal for heavier bodied sleepers
Latest deal: Molblly 14 Inch King Memory Foam Mattress
Sweetnight Breeze King Gel Memory Foam Mattress for Back Pain
Sweetnight has an amazing king size bedmattress that will address and fix all your back issues. The mattress has a white top with a dark grey square design on the sides that looks clean and elegant. Goes great with any setup and gives a very premium vibe. The mattress has memory foam that conforms to your body shape and provides major pressure relief. It has good ventilation as well along with an ergonomic foam shape that gives you ultimate comfort. The build quality is also superb so it will carry your weight easily without issues. You get a 10-year warranty with the mattress which comes to you well packaged.
Durable and well-built
Initial off-gassing upon opening
Latest Deal: Sweetnight Breeze King Gel Memory Foam Mattress
Revel Custom Cooling Gel Memory Foam Mattress
Revel brings you a custom take at king size mattresses that has the proper firmness that you come to expect from a good mattress. The all-white minimal design looks clean and brigs a very simplistic vibe that compliments and up lifts every room. When it comes to the build quality, this mattress has triple layered memory foam that takes the shape of your body and supports your weight well. The mattress is plush and comfortable but firm at the same time to bring you the perfect ratio of softness and toughness. The foam is CertiPUR US certified and comes well packaged. A great option for your consideration.
Firm and comfortable
May be too firm for some
Latest deal: Revel Custom Cooling Gel Memory Foam Mattress
Olee Sleep Galaxy Hybrid Gel Infused Memory Foam and Pocket Spring Mattress
Olee sleep is a well-known brand in the king size bed mattress space and they bring you their take on a firm new mattress that will more than satisfy your comfort needs. The mattress has a flower-like design on top that continues to the sides interrupted by an elegant dark grey line that covers the sides. The soft memory foam conforms to your body shape and provides with the best comfort you will find. The build quality is also top notch and it will hold up through a good amount of time. The weight distribution of the mattress is also great and is shipped to you well packaged.
Made from supportive memory foam
Some initial off-gassing upon opening
Latest deal: Olee Sleep Memory Foam and Pocket Spring Mattress
Signature Design by Ashley Chime Express Hybrid Innerspring Mattress
Signature Design by Ashley is another known name in the mattress business, and they bring you a great king size that will provide you with just the right amount of firmness you come to expect from a high-quality mattress. The looks of this mattress are simple with a white top and a two-tone side with black and white strips. It goes well with any setup and looks clean. The foam has gel infused with memory foam in it that conform to your body for better support and also regulates the temperature well. The build quality is top notch and you get the ultimate comfort you expect. The mattress comes well packaged and is a great deal for you.
Comfortable and plush
Initial off-gassing is common
Latest deal: Chime Express Hybrid Innerspring Mattress
Jacia House Memory Foam Pillow Top King Mattress
Jacia brings you a great pillow top king size mattress that has a great design. The top has a button up look and the sides have black line borders that look clean. The mattress has great firmness and plushness for the best comfort you can get. The pillow top makes a great bed to rest on and the build quality is also great. The mattress can support your weight and distribute it just fine. It also meets all the flammability standards, so you don’t have to worry about any fire hazard. The high-density memory foam supports your body well and the mattress comes well packaged.
Well packaged and no flame hazard
May be too firm for some
Latest deal: Jacia House Memory Foam Pillow Top Mattress
Modway Jenna Quilted Pillow Top King Mattress
Modway Jenna has the perfect pillow top mattress for you that will provide great comfort and quality in bed. The perfect button design on top leaves spaces for air to flow and the sides have black lines on the edges that look clean and minimalistic. The mattress offers isolated motion which means you won’t be disturbed if someone else climbs into the bed. The foam is soft and enables extreme comfort when you lay on it. The surface area of the mattress is also great along with the build quality. This one can easily support your weight and will see you through a long time. It comes with a 10-year warranty and you will have a great experience with this one.
Isolates motion well
May be too soft for some
Latest deal: Modway Jenna Quilted Pillow Top King Mattress
Sealy 13.5 Inch Cushion Firm Euro Pillow Top Mattress
Sealy brings you a very low-profile king size mattress with a pillow top that will appeal many minimalists. The clean white design up top complimented by the black sides looks sleek. The height of this mattress is great which is a good thing because it lets you get on and off the mattress easily. The memory foam conforms to your body and supports it well while keeping the temperature cool and regulated. The ventilation on this one is also great. The build quality is top notch and it will see you through quite some time. The packaging is great and this one is a great option.
Cooling memory foam
May be too firm for some
Latest deal: Sealy 13.5 Inch Cushion Firm Euro Pillow Top Mattress
Avenco Hybrid Innerspring and Gel Memory Foam Mattress
If you have been looking for a cheap king size mattress and haven’t been successful then you have come to the right place. Avenco has a unique looking king size mattress that has a great white design up top with a black and white side that looks super clean and sleek. You get pocketed springs that provide great elasticity and motion isolation as well which reduces disturbances at night. The layers of foam are also very plush and comfortable. It is CertiPUR US certified and comes to you packaged well. For the price tag you pay, you are getting a lot of mattress and will be happy with the purchase.
Not suitable for those who dislike memory foam
Latest deal: Avenco Hybrid Gel Memory Foam & Innerspring Mattress
Avenco 10 Inch King Memory Foam Mattress in a Box
Avenco is back yet again with an inexpensive offering when it comes to king size mattresses. This one has a clean white top with dark sides and minimal branding that looks beautiful. It will blend in with any room and provide you with comfort. The foam is gel infused which keeps the temperature regulated and enables peaceful sleeping. This mattress is pressure relieving and the 4-layer foam technology is CertiPUR US certified. You get good firmness at this price tag and the height is also respectable. You get a 100 nights trial before you decide whether you want to keep it or not.
Takes a while to fully expand after opening
Sweetnight 12 Inch King Pillow Top Gel Memory Foam Mattress
Sweetnight is a well-known brand in the mattress space so when they bring an inexpensive offering, there is always an element of confidence with it. The mattress is king size, so you get plenty of room and the design looks great with the white top and dark sides. It blends well in any room and uplifts the vibe. The mattress is easy to maintain as the outer layer is removable and washable. The foam is also soft and provides a comfortable experience with the right amount of firmness. The gel infused memory foam is also found here which conforms to your body and supports it well. The mattress is CertiPUR US certified and has a 10-year guarantee. You will love what you get.
Gel infused memory foam
Comfortable and durable
Could be taller
Latest deal: Sweetnight King Pillow Top Gel Memory Foam Mattress
Best King Size Mattress Buyers Guide
What to look for when buying a king size mattress
Many brands will try to pull a fast one on you by not shipping the correct size. One of the reasons we buy a king size mattress is to have all the surface area we can get. So, make sure what you get is the right size when you buy a mattress.
Quality is a major concern when it comes to mattresses as many of them lose form over time or their springs start poking. Make sure you get a good high quality mattress that sees you through a long time.
Mattresses tend to include memory foam inside them. This foam conforms to your body shape and allows it to be supported well. It keeps your posture straight at night and releases strain from your spine.
Today we looked at some of the best king size mattresses you can find online. All of them had great comfort and nice designs. Some had memory foam while others offered pocket springs for that extra elasticity. Some had both of them. Some even surprised us at shockingly low prices for what they were offering. Height was an important aspect of mattresses and most of them delivered on this front as well. Manufacturers generously added a 10-year warranty with their products and also packaged them in the best ways possible to reduce shipping costs while avoiding any damage to the mattress.
All in all, you will love the experience no matter which one you get.
Head of Content at Sleepedia
Lauren is Sleepedia's Head of Content and is a certified sleep therapist who loves her sleep. Lauren helps people to get back to those deep, dream-filled nights they once had by helping to identify problems with their routine and sleep setup. Whether it's a mattress or pillow, Lauren researches the best products in the industry to provide you with an in-depth review of everything you need to know to encourage your buying decision.