When it comes to best king size mattress, you can either consider yourself in luck or overwhelmed – because there are hundreds if not more great choices. Although it's great to have options, you can easily get lost in them. If you're unsure where to start, we'll help you narrow down the qualities you're looking for in your search for the best king size mattress.
Comparison Table
Product FAQs

Image Source: Pixabay.com
Here’s a look at some common questions regarding the much-coveted king size mattress.
What are the benefits of a king-sized mattress?
King-Sized Vs. California King – what’s the difference?
How We Reviewed the Best King Size Mattresses

Image Source: Unsplash.com
When we reviewed these beds in search of the best king size mattress, we looked for those that offered up as many qualities as we could get, for the price. To be considered, the beds must have been made with quality materials, have a great warranty, come in a variety of firmness options, and have a few other qualities that set them apart from the rest.
Overall Price Range of King Size Mattresses
When we reviewed these beds in search of the best king size mattress, we looked for those that offered up as many qualities as we could get, for the price. To be considered, the beds must have been made with quality materials, have a great warranty, come in a variety of firmness options, and have a few other qualities that set them apart from the rest.
Product Buyer’s Guide: How to Choose the Best King Size Mattress

Image Source: Pixabay.com
Qualities & Features
With so many choices overwhelming the market, mattress manufacturers will throw in some upgraded features. For example, you might look for hypoallergenic features, mattresses that include a cover or water-proof sheet, or those with various certified materials or foams.
Firmness, Comfort, & Layers
There are many factors to consider regarding your comfort. For example, do you often sleep hot? Look for a mattress with a cooling gel layer. You may also seek out a bed that has quality airflow, a firmness you're comfortable with, or specific layers you're looking for in the design.
Warranty & Durability
Many mattresses come with a guarantee of 10 years or more, but be careful to read the fine print. Some can be voided by the simple spill of a glass of water on the mattress. You want to find a mattress that will stand the test of time and keep you comfortable for many years to come.
The Top Eight King Size Mattresses
If you're ready to narrow down your search and pick the best king size mattress for you, go ahead and skim our reviews or skip to our comparison table for a quick look.
Saatva Luxury Firm King 11.5” or 14.5”
- 13 Inch Pocket Coil Pillow Top Mattress Gel Infused Memory Foam. This is one of our best selling mattresses because it...
- Gel infused memory foam regulates temperature while conforming to the body to ease pressure points
- 25 Year Warranty. We have been in business over 40 years to back it up.
Saatva designs mattresses that replicate high-end models without the price tag. Their engineers formulated a bed based on standard retail luxury models. They included a pillow top with extra cushioning, durable steel coils combined with an additional layer of individually wrapped coils and added lumbar support.
PROS
CONS
Key Features
Saatva has designed its mattress with a number of quality features including the luxury pillow top packed with more cushioning than most standard pillow top mattresses all fit underneath an organic cotton cover. Coils are individually wrapped coils give a responsive feel to the mattress and a foam-based perimeter support system to give more support and prevent sagging.
Where to Buy
Dreamcloud Luxury Hyrbid Mattress
- #1 FASTEST GROWING BRAND IN THE U.S. - Recognized as the fastest growing e-commerce retailer by Internet Retailer,...
- STAY COOL THROUGH THE NIGHT - Gel-infused memory foam does double duty, providing you with unparalleled heat...
- INDUSTRY LEADING 180 NIGHT TRIAL- You can try DreamCloud risk-free for 180 days and return it if you are not 100% happy...
If you’re in search of a hybrid luxury mattress, you may enjoy the patent-pending technology engineered for this mattress that provides support and spinal alignment while allowing you to lay on the plush surface.
PROS
CONS
Key Features
In addition to the many benefits listed above, you can try this mattress out for 365 nights and enjoy their "Everlong Warranty." At 15 inches high, this mattress features a tufted cashmere euro pillow-top, gel-infused memory foam, and quilted memory foam among its many layers.
Where to Buy
Classic Brands Gel Memory Foam Mattress
- 76" W x 80" L x 12" H
- The newest technology in bedding, this mattress combines the traditional innerspring wrapped coils with the newest...
- Beautifully detailed quilted pillowtop knit cover with a corded edge and coordinating knit sides for breathability
If you’re looking for a budget buy that won’t let you down over the years, the Classic Brands Gel Memory Foam Mattress features excellent comfort and support compared to some of its pricier counterparts.
PROS
CONS
Key Features
For a lower-priced model, this mattress comes with many of the features you'll find in the higher-end models. It's a hybrid mattress utilizing both coil-on-coil and memory foam with several additional layers.
Where to Buy
Casper Sleep Memory Foam Mattress
- Our 11” bed in a box mattress offers Casper comfort in a streamlined design. 3 layers of premium foam for support,...
- Easy-to-clean upholstery-grade zip off cover for added durability
- Please note: any new product will expand within minutes and can have a mild scent upon unboxing that will dissipate in a...
The Casper Sleep Memory Foam Mattress is an excellent buy, especially if you watch for sales which come around every so often. This popular model features a medium-firm design that's not too hard or soft and provides the right amount of sink.
PROS
CONS
Key Features
In case you're a hot sleeper, this mattress is excellent for keeping you cool all night long. Each foam layer in the bed was designed to add support and comfort so that you gain a comfortable night's sleep. The thickness is at 8.5 inches and will fit in regular sheets, so no need to purchase additional, deep-pocketed sheets.
Where to Buy
Zinus 12-Inch Memory Foam Mattress
- THE RIGHT COMBINATION- Our special recipe for rejuvenating rest. Refreshing green tea and moisture-absorbing Activ...
- PRESSURE-RELIEVING FOAMS- 3 inches conforming memory foam, 2 inches soft, airflow enhancing comfort foam, and 7 inches...
- CERTIPUR US CERTIFIED- Highest quality foam is CertiPUR US Certified for durability, performance, and content
As far as memory foam mattresses go, the Zinus 12-Inch Memory Foam mattress is one of the most highly rated. It comes with the option to purchase in both the 8-inch and 10-inch sizes, but this review is based on the 12-inch size. It's made with five essential layers making it responsive, supportive, and comfortable.
PROS
CONS
Key Features
This mattress by Zinus features 12-inches of memory foam made up of five layers. The layers include the 5-inch high-density base support foam, the 3-inch comfort foam, 2-inch memory foam, AND 1-inch viscolatex responsive foam. This mattress feels firmer than it is, and you should give it more than the first feel to let it conform to your body and get used to it.
Where to Buy
The Purple Bed
If you're in search of a more simplistic mattress that's not purple, you may opt for the Purple Bed. Although the inner cushion is purple, it comes in a sleep white cover, making it look much like many other choices on the list.
PROS
CONS
Key Features
The Purple Bed mattress is hypoallergenic, a medium firmness, made with non-toxic and ecofriendly materials. It also features a top layer made of grids so that you can enjoy pressure relief and equal weight distribution.
Where to Buy
Dynasty Mattress 15.5 Inch Grand Atlantis Breeze
- The Atlantis-Breeze is One of the Top GEL Mattress Online! Made with Highest Quality 7.5" GEL with Memory Foam and...
- 1.5" HD 5lb Cool Extra Comfort GEL Quilted Euro Top to provide a plush sleep surface, luxurious white cover with brown...
- 2" HD 4lb Cool Comfort GEL and 2" HD 3lb GEL Memory and 2" HD 3lb Memory Foam. Sleep Cool Technology Memory Foam! With...
Those in search of a thicker mattress will enjoy the Grand Atlantisbreeze, which sits at 15.5 inches thick. This design features six layers, including the 6-inch base layer, 2-inch HD memory foam, and various HD Cool GEL Memory foam.
PROS
CONS
Key Features
Among the many layers of supportive memory foam in this design, are layers to assist in keeping you fresh throughout the night as well as supported enough to sleep well for years to come. The mattress features breathability as well as pressure relief that's comparable with some of the luxury models.
Where to Buy
Serta Perfect Sleeper Elite Plush Pillow Top Mattress
- 76" W x 80" L x 10.5" H
- Combines the superior support of a wrapped-coil innerspring system with the conforming response of memory foam for the...
- Beautifully detailed quilted knit cover with a corded edge and coordinating knit sides for breathability
Serta’s Perfect Sleeper Elite Plush Pillow Top mattress is one of many “perfect sleepers” released by Serta. This hybrid mattress features both coil springs and memory foam for real support and comfort. The firmness in this mattress is just the right balance between ultra-firm and plush.
PROS
CONS
Key Features
Among the many layers of supportive memory foam in this design, are layers to assist in keeping you fresh throughout the night as well as supported enough to sleep well for years to come. The mattress features breathability as well as pressure relief that's comparable with some of the luxury models.
Where to Buy
Comparison Table
Here’s a detailed look and comparison of all the mattresses listed above for a nice side by side view!
Mattress | Firmness | Type | Warranty | Where to Buy |
---|---|---|---|---|
SAATVA | Available in plush, luxury firm, and firm | Hybrid coil-on-coil with memory foam and euro pillow-top | 15-Year limited warranty | |
Dreamcloud | Medium-Firm | Pocket coils & memory foam | Limited lifetime warranty | |
Classic Brands Gel Memory Foam Mattress | Medium-firm | Hybrid coil-on-coil with memory foam and pillow-top | 10-Year warranty | |
Casper Sleep Essential Mattress | Medium-Firm | Open-cell foam, memory foam, Adaptive Transition foam | 10-Year limited warranty | |
Medium-firm | Various layers memory foam | 10-Year limited warranty | ||
The Purple Bed | Medium-plush | Hyper-elastic polymer layer, comfort and support foams | 10-Year limited warranty | |
Dynasty Mattress 15.5-Inch Grand Atlantisbreeze | Medium-soft | 6 layers foam including base foam, HD memory foam, and more | 20-Year limited warranty | |
Serta Perfect Sleeper Elite Plush Pillow Top | Medium-Firm | Hybrid coil-on-coil with memory foam and pillow-top | 10-year limited warranty |
Final Verdict

Image Source: Pexels.com
You can't go wrong with any of the king-size mattresses on this list, so if any of them strike you as better than the rest, go for it! Being big fans of the thicker mattresses ourselves, we tend to enjoy the Dynasty Atlantisbreeze the most, since it was the thickest. Thickness aside, the bed is wonderfully comfortable, conforms to the body just right and keeps its support over time.
Keep in mind that this mattress was deemed too soft by others when you make your choice, but everyone has their own opinion on firmness. If you require a much firmer bed, you may opt for the Saatva king size mattress. This bed has more firmness options to choose from and is also highly supportive and comfortable.
Featured Image Source: Pixabay.com
Last update on 2021-01-19 / Affiliate links / Images from Amazon Product Advertising API