Best Luxury Firm King-Size Mattresses

Our review process

No more reading through dozens of confusing articles to try to decide which luxury firm king-size mattress to get! By reading this article, you'll have an excellent grasp on what kinds of mattresses are available on the market, so you can confidently purchase a mattress that will ensure comfortable sleep for years to come.

We're here to help you out with your decision when you choose your new luxury firm king-size mattress. Luxury firm mattresses have an indentation load deflection rating of 29-31 pounds and are a great choice for people who tend to move from their sides to back throughout the night. They are suitable for couples where one enjoys to sleep on their side and the other on their back or stomach. However, they provide less support than other mattresses, so your spine won't be aligned properly while sleeping. Additionally, luxury firm mattresses are less durable than memory foam mattresses, lasting between 7-10 years at most.

These king-size mattresses measure 76" X 80" and are ideal for master bedrooms. They are designed to spaciously fit couples, offering extra space for you to spread out. However, they are not great for small areas, since they can make the area look somewhat cluttered. On top of that, king-size mattresses are large and heavy, making them hard to transport and flip.

Our Top Ranking Mattresses:

	Product Name	Brand	Type
Best Overall Score 1	Simmons Beautyrest World Class Luxury Firm Memory Foam King-Size 13.5-Inch Mattress	Simmons	memory foam
Runner Up 2	Dream Solutions USA CB680 Luxury Firm Pocketed Coil King-Size Firm Poly Foam 14-Inch Mattress	Dream Solutions USA	pocketed coil
For Side Sleepers 3	Sealy Luxury Firm Hybrid King-Size 10.5-Inch Mattress	Sealy	hybrid
4	NuForm Luxury Firm Gel Memory Foam King-Size 8-Inch Mattress	NuForm	gel memory foam

Our Top Ranking Mattresses

Best Overall Score

Simmons Beautyrest World Class Luxury Firm Memory Foam King-Size 13.5-Inch Mattress

Customer Rating

Brand

Simmons

Type

memory foam

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Runner Up

Dream Solutions USA CB680 Luxury Firm Pocketed Coil King-Size Firm Poly Foam 14-Inch Mattress

Customer Rating

Brand

Dream Solutions USA

Type

pocketed coil

Buy now on Amazon

For Side Sleepers

Sealy Luxury Firm Hybrid King-Size 10.5-Inch Mattress

Customer Rating

Brand

Sealy

Type

hybrid

Buy now on Amazon

NuForm Luxury Firm Gel Memory Foam King-Size 8-Inch Mattress

Customer Rating

Brand

NuForm

Type

gel memory foam

Buy now on Overstock

Best Overall Score

Simmons Beautyrest World Class Luxury Firm Memory Foam King-Size 13.5-Inch Mattress

5.0 by user reviews

The Simmons Beautyrest World Class Luxury Firm Memory Foam King-Size Mattress is a good option for anyone who gets very hot during the night. This Simmons mattress features a 13.5-inch thickness, maintaining its quality and shape even after years of use. Available in a king-size, it ensures that you'll have lots of space to spread out and sleep comfortably. It has a luxury firm comfort level, which encourages a deeper sleep.

With a memory foam construction, this Simmons mattress allows you to toss and turn and then re-contours to your body after you've settled. It has a ventilated design to stop mold and mildew from forming. With cooling technology, it effectively dissipates heat to ensure your bed remains cool. Made with pressure point relief technology, it increases comfort and minimizes pain.

Pros

Luxury firm mattress delivers the perfect mix of firmness and softness
Made with pressure point relief technology to increase comfort and alleviate pain
Cooling technology effectively distributes heat to ensure your bed remains cool

Cons

King-size can be difficult to move
Luxury firm mattress can put painful pressure on pressure points
13.5-inch thickness may tend to appear too large in some bed frames

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Runner Up

Dream Solutions USA CB680 Luxury Firm Pocketed Coil King-Size Firm Poly Foam 14-Inch Mattress

5.0 by user reviews

For a combination of comfort and support, choose the Dream Solutions USA Luxury Firm Pocketed Coil King-Size Mattress and enjoy a good night's sleep. Featuring a reversible design, this thick mattress can be flipped to increase the lifespan of your mattress. With a luxury firm comfort level, it ensures proper spinal support, which is good for people who enjoy sleeping on their back. This thick mattress has a supportive design, aligning your spine horizontally when sleeping on your side. It has a 14-inch thickness, maintaining its quality and shape even after years of use. Designed with a VertiCoil innerspring core, this firm poly foam mattress has a more durable perimeter and excellent orthopedic support. Available in a king-size, this Dream Solutions USA mattress will provide maximum bed space. Featuring a pocketed-coil construction, it provides optimal comfort because it minimizes pressure points. This orthopedic mattress features a quilted cover, providing added comfort and cushioning. It is fire resistant, which is a safe option for your home.

Pros

Luxury firm mattress conforms to the curves of your spine in order to keep your body straight
Firm poly foam core for solid support and excellent durability
Features a VertiCoil innerspring core, providing increased support around the perimeter and edges of the mattress

Cons

King-size can be difficult to move
Luxury firm mattress can put painful pressure on pressure points
14-inch thickness can tend to appear bulky in some bed frames

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For Side Sleepers

Sealy Luxury Firm Hybrid King-Size 10.5-Inch Mattress

5.0 by user reviews

For a better night's rest and ultimate comfort, opt for a Sealy Luxury Firm Hybrid King-Size Mattress. This thick mattress reduces motion transfer, which allows for undisturbed sleep, even if your partner tosses and turns in bed. It features a luxury firm comfort level, providing more support to body parts that are susceptible to stress. With pressure point relief, it increases comfort and alleviates pain. With a 10.5-inch thickness, this Sealy mattress can sustain a lot of weight so it will stay in great condition for longer. It is available in a king-size, giving you as much space as possible. This Sealy mattress features a hybrid construction, incorporating the best features of various different mattress types. It is suitable to use for standard box springs.

Pros

Luxury firm mattress conforms to the curves of your spine in order to keep your body straight
Made with innovative pressure point relief technology for additional spinal and joint support
Minimizes motion transfer, making it perfect for light sleepers

Cons

King-size can be difficult to move
Luxury firm mattress can put painful pressure on pressure points
10.5-inch thickness may appear disproportional in some bed frames

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Additional Picks

NuForm Luxury Firm Gel Memory Foam King-Size 8-Inch Mattress

5.0 by user reviews

The NuForm Luxury Firm Gel Memory Foam King-Size Mattress is ideal for people who frequently have allergies. This NuForm mattress is available in a king-size, allowing partners to have plenty of their own individual sleeping space. It has an 8-inch thickness, so the mattress will not sag in the middle or fall on the sides. Built with antimicrobial fabric, it manages the growth of mold, bacteria, and dust mites. It features a luxury firm comfort level, providing stronger balance to pressure areas that we tend to stress. This NuForm mattress helps eliminate tossing and turning at night, significantly improving your quality of sleep. Designed with a gel memory foam construction, it will draw heat away from the body due to its better airflow. Featuring hypoallergenic materials, it ensures a restful night's sleep. It is dust mite resistant, decreasing your exposure to allergens.

Pros

Luxury firm mattress delivers the ideal combination of firmness and softness
Features antimicrobial fibers, protecting you from dangerous mildew
Helps reduce tossing and turning at night, improving your quality of sleep

Cons

King-size can be difficult to move
Luxury firm mattress can put painful pressure on pressure points
8-inch thickness doesn't provide the best support

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Need Some Help Narrowing Down Your Options? Here's Some Additional Information to Know:

Different Types of Luxury Firm King-Size Mattresses Available

Gel Memory Foam Mattresses

Trying to find a good gel memory foam mattress? This luxury firm king-size mattress could be a good choice for you. These mattresses are made with various materials, giving you a wide range of foam densities to pick from. They deliver even weight distribution to prevent tipping. Featuring a breathable design, they allow air to circulate freely, which will help keep them in good shape over time. Providing pressure-point relief, they adequately support sensitive areas of the body in any sleeping position. Thanks to superior motion isolation, these gel memory foam mattresses are great for couples with a restless sleeper.

Hybrid Mattresses

If you're thinking about getting a hybrid mattress, this luxury firm king-size mattress might be a good choice. Featuring various foams, these hybrid mattresses provide the perfect amount of comfort. They are good at dissipating heat to maintain a comfortable sleep temperature. With even weight distribution, they prevent tipping from occurring. These hybrid mattresses offer pressure point relief to properly align the spine. A potential downside is that they are expensive, so if you're looking for a cheaper mattress, you should consider something else.

Memory Foam Mattresses

If you're thinking about getting a memory foam mattress, this luxury firm king-size mattress might be a good choice for you. With pressure-point relief, these mattresses sufficiently support your hips and shoulders in any sleeping position. They are made with various materials, giving you a wide range of foam densities to pick from. These mattresses offer superior motion isolation technology, making them great for restless sleepers, unlike traditional spring mattresses. A potential downside is that they can smell a bit like chemicals initially, sometimes lasting up to several weeks before wearing off. Also, these mattresses aren't waterproof, so any interaction with moisture can cause degeneration and decrease their usable life.

All You Need to Know About Mattress Thickness

8-10 Inch Mattresses

Trying to find a luxury firm king-size mattress that's not too thin or thick? Check out an 8-10 inch mattress such as this one. These 8-10 inch mattresses are less likely to cave in, ensuring that you sleep in the correct posture to prevent back problems. They are suitable to use with standard-size sheets, so it will be easy to find linens that fit. They are standard size, so you can rest assured knowing that they'll be able to fit in nearly all bed frames. However, they provide less support than other types of mattresses, so if you are prone to back or joint pain, then you should consider a thicker mattress. Another drawback is that they tend to wear out quickly, so they won't last long before beginning to deteriorate. These are a few facts to help you decide what kind of luxury firm king-size mattress is ideal for you.

10-12 Inch Mattresses

There's only one luxury firm king-size mattress with a thickness of 10-12 inches. These 10-12 inch mattresses are less likely to sag, ensuring that you sleep in the correct posture to prevent joint problems. They are standard size, so you can rest assured knowing that they'll be able to fit in nearly all bed frames. These 10-12 inch mattresses are suitable to use with standard-size sheets, so it will be easy to find linens that fit. They are built with a strong build, making them more durable and able to sustain more weight. Something to keep in mind is that they are higher off the ground than thinner mattresses, so getting into and out of bed is more difficult than it would be with a mattress that is thinner. These are just a few facts to help you get a better idea of what kind of luxury firm king-size mattress is ideal for you.

12-14 Inch Mattresses

If you're trying to find a supportive and comfortable luxury firm king-size mattress, you might want to think about getting a 12-14 inch mattress. These mattresses are built with a strong build, making them more durable and able to sustain more weight. They are less likely to sag, ensuring that you sleep in the correct posture to prevent back pain. They are suitable to use with standard-size sheets, so it will be easy to find linens that fit. One downside is that they are higher off the ground, so getting into and out of bed is more difficult than it would be with a thinner mattress. If you think a 12-14 inch mattress is a good choice, check out this one.