Firm Back Support King Mattresses

Discover the ultimate sleep experience with firm back support king mattresses, designed to provide the stability and comfort you need for a restful night's sleep. Perfect for those who crave a sturdy foundation, these mattresses offer the ideal blend of support and space, ensuring you wake up refreshed and ready to take on the day. With a variety of styles and materials to choose from, finding the perfect mattress to suit your needs has never been easier. Transform your bedroom into a haven of relaxation with our selection of firm back support king mattresses that cater to both comfort seekers and those in need of extra support.

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Beautyrest PressureSmart 2.0 Firm 11" Mattress

Starting at

$2200⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Temperature
Bed Partner

Sleepy's Basic Memory Foam Firm Mattress

2437

Starting at

$300⁷⁷

$1000⁹⁹

$700 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Support
Temperature

Sleepy's Basic Innerspring Firm Mattress

8060

Starting at

$250⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain

Sleepy's Rest Firm 2.0 Innerspring Mattress

6453

Starting at

$450⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain

Serta iSeries 2.0 Hybrid 2000 12.5" Firm Mattress

1664

Starting at

$2400⁹⁹

$3000⁹⁹

$600 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Temperature
Bed Partner
Pain

Save up to 749 on a premium adjustable base with mattress purchase. Use code ELEVATE (must add base to cart)

Sleepy's Basic Foam Mattress

1263

Starting at

$200⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Bed Partner

Beautyrest Greenwood 10.5" Firm Mattress

3191

Starting at

$1300⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

2644

Starting at

$1700⁹⁹

Extra Firm Comfort, best for

Back;Stomach Sleepers
Bed Partner
Pain
Temperature

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Beautyrest BR800 11.25" Firm Mattress

1657

Starting at

$1300⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Toss and Turn
Pain
Bed Partner

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Stearns & Foster Estate 14.5" Firm Mattress

995

Starting at

$2999⁰⁰

Firm Comfort, best for

Back;Stomach Sleepers
Bed Partner
Pain
Temperature

Receive $300 Instant Gift⁴ with purchase.

Sealy Essentials Sudley 8.5" Firm Mattress

915

Starting at

$400⁹⁹

$1000⁹⁹

$600 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Pain

Beautyrest Silver BRS900-C 13.75" Extra Firm Mattress

1456

Starting at

$2000⁹⁹

Extra Firm Comfort, best for

Back;Stomach Sleepers
Bed Partner
Pain
Temperature

FREE ADJUSTABLE BASE ³ up to 499 value with code ELEVATE (must add base to cart)

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1421

Starting at

$800⁹⁹

$1000⁹⁹

$200 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Bed Partner
Pain
Temperature

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Pressuresmart MF 12.5" Firm Mattress

156

Starting at

$1850⁹⁹

$2600⁹⁹

$750 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Sleepy's By Sealy Slumber Cushion Firm Mattress

225

Starting at

$560⁹⁹

$2000⁹⁹

$1440 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Bed Partner
Toss and Turn
Pain

Tulo Lavender 6" Firm Memory Foam Mattress

208

Starting at

$400⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Toss and Turn
Pain
Temperature

Tulo Bamboo 6" Firm Green Tea Memory Foam Mattress

5128

Starting at

$730⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Toss and Turn
Pain
Temperature

Nectar Classic 12" Firm Memory Foam Mattress

112

Starting at

$849⁰⁰

$1399⁰⁰

$550 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Bed Partner
Temperature

Zinus Green Tea 6 Cushioned Firm Memory Foam Mattress

1089

Starting at

$540⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Temperature

Serta Perfect Sleeper Elkins III 10" Firm Mattress

1527

Starting at

$1200⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Temperature
Toss and Turn

Zinus Green Tea 10 Cushioned Firm Memory Foam Mattress

1062

Starting at

$860⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Temperature

Sealy Essentials Spruce 5.5" Firm Mattress

1031

Starting at

$950⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain

Zinus Green Tea 8 Cushioned Firm Memory Foam Mattress

1010

Starting at

$720⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Temperature

Tulo 8" Firm Cooling Hybrid Mattress

Starting at

$900⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Toss and Turn
Pain
Temperature

Sealy Posturepedic Plus Hybrid High Point 14" Firm Mattress

3763

Starting at

$1450⁷⁷

$2899⁰⁰

$1449 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Bed Partner
Temperature

Tempur-Pedic TEMPUR-ProAdapt 12" Firm Mattress

3451

Starting at

$4099⁰⁰

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Bed Partner
Temperature

Receive $300 Instant Gift⁴ with purchase.

Firm Back Support King Mattresses

A king-size mattress with firm back support is more than just a place to lay your head—it’s the foundation for restorative sleep and a healthy lifestyle. For many, the appeal of a firm mattress lies in its ability to provide consistent, even support across the entire sleep surface, making it an excellent choice for those who experience back discomfort or who prefer a sturdier feel. The ample space of a king mattress means couples can stretch out without disturbing each other, while individuals can luxuriate in extra room to find their ideal sleeping position. Firm back support king mattresses are particularly beneficial for back and stomach sleepers, as the solid surface helps maintain proper spinal alignment throughout the night. This can be especially important during the warmer summer months, when tossing and turning in search of comfort can disrupt sleep. The added support can also help reduce pressure points, allowing muscles to relax and recover—whether you’re winding down after a day of outdoor activities or simply seeking relief from the daily grind.

When choosing a firm back support king mattress, it’s important to consider your unique needs and preferences. Those who regularly wake up with aches and pains may find that a mattress with a high level of mattress firm support is the key to waking up refreshed and ready to take on the day. Parents may select a king-size firm mattress for the family bedroom, creating a cozy haven for weekend movie nights or early morning snuggles. For those who frequently host guests, a king mattress with robust back support can make overnight stays more comfortable, ensuring visitors wake up feeling their best. Gifting a firm king mattress can be a thoughtful gesture for newlyweds setting up their first home, or for loved ones who are moving into a new space and want to prioritize their health and well-being. As the days grow longer and travel season ramps up, investing in a supportive mattress can help ensure restful sleep between adventures, whether you’re returning from a road trip or simply enjoying a staycation.

Firm back support king mattresses are designed to stand up to years of use, offering durability and reliability without sacrificing comfort. Many models feature advanced materials that promote airflow and temperature regulation, which can be especially welcome during June’s warmer nights. The versatility of a king mattress makes it suitable for master bedrooms, guest suites, and even shared sleeping spaces, adapting to a range of lifestyles and room layouts. For those seeking similar support in a slightly different size, options like Back Support Cal King Mattresses are also available, offering the same commitment to spinal alignment and pressure relief. Ultimately, a firm king mattress with proper back support is an investment in quality rest, providing the foundation for active days, peaceful nights, and a healthier, happier you.