4th Of July Extra Firm King Mattresses Sale

Shop the 4th Of July Extra Firm King Mattresses to explore king mattresses at special holiday prices. Find options for your bedroom and compare available extra firm mattresses to choose the right fit for your sleep space.

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Beautyrest Silver BRS900 11.75" Extra Firm Mattress

3302

Starting at

$709⁹⁹

$1699⁹⁹

$990 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Allergies
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900-C 13.75" Extra Firm Mattress

1816

Starting at

$859⁹⁹

$1999⁹⁹

$1140 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Oasis Sleep 12" Extra Firm Mattress

910

Starting at

$1109⁰⁰

$1399⁰⁰

$290 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Sleep Excellence Extra Firm Mattress

957

Starting at

$1449⁹⁹

$1999⁹⁹

$550 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Toss and Turn
Temperature
Bed Partner

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest PressureSmart 2.0 Extra Firm 13.5" Mattress

2187

Starting at

$1450⁰⁰

$2899⁹⁹

$1450 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Stearns & Foster Estate 13.5" Extra Firm Mattress

1065

Starting at

$2799⁰⁰

$3099⁰⁰

$300 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Receive $300 Instant Gift⁴ with purchase.

Stearns & Foster Lux Estate 13.5" Extra Firm Mattress

900

Starting at

$3299⁰⁰

$3899⁰⁰

$600 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Allergies
Toss and Turn

Receive $300 Instant Gift⁴ with purchase.

Beautyrest Black Series One 13.5" Extra Firm Mattress

701

Starting at

$2499⁰⁰

$2899⁰⁰

$400 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Allergies
Bed Partner
Toss and Turn
Temperature

$300 ⁶ adjustable base instant gift with purchase.

Dreamcloud PressureSmart Technology Extra Firm Pillow Top Mattress

298

Starting at

$1899⁰⁰

$2649⁰⁰

$750 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Posturepedic Plus Norman II 13" Ultra Firm Mattress

Starting at

$1499⁰⁰

$1899⁰⁰

$400 OFF

Extra Firm Comfort, best for

Back Sleepers
Pain
Allergies
Bed Partner
Toss and Turn

Receive $200 Instant Gift⁴ with purchase.

Sealy Posturepedic Elite Brenham II 14" Ultra Firm Mattress

Starting at

$2399⁰⁰

$2599⁰⁰

$200 OFF

Extra Firm Comfort, best for

Back Sleepers
Pain
Temperature
Allergies
Bed Partner
Toss and Turn

Receive $200 Instant Gift⁴ with purchase.

Kingsdown Wesley 15" Extra Firm Mattress

Starting at

$4199⁰⁰

$4799⁰⁰

$600 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Celebrate the Fourth of July with savings on extra firm king mattresses at Mattress Firm. Designed for sleepers who prefer a supportive, stable feel, an extra firm king mattress provides a spacious sleep surface and a solid foundation that can help promote proper spinal alignment. Explore king size mattresses in a range of materials, including innerspring, hybrid and foam designs, to find the comfort technology that best fits your sleep style. Whether you are upgrading your primary bedroom or creating a more comfortable space for better zzz's, the 4th of July extra firm king mattress is a smart time to shop trusted brands and discover a mattress that helps you sleep well so you can live well. Find the right extra firm king mattress for your home with expert guidance from Mattress Firm. Our selection includes supportive king mattresses with features such as breathable covers, responsive coils, pressure-relieving comfort layers and reinforced edges for a stable feel across the mattress. Compare mattress brands, explore financing and delivery options and choose the sleep solution that fits your preferences and budget during the Fourth of July mattress . Shop online or visit a Mattress Firm store to experience extra firm king mattresses in person and get personalized recommendations from Sleep Experts® who can help make sleep easy™.

What is an extra firm mattress? + -

An extra firm mattress has a very solid feel with minimal cushioning and surface softness. It may feature materials such as supportive coils, dense foam or a combination of both.

Who may prefer an extra firm mattress? + -

Extra firm mattresses may appeal to people who prefer a highly supportive, stable feel rather than a plush or cushioned sleep surface. Personal comfort preferences are the best guide when comparing firmness levels.

What materials are commonly found in extra firm mattresses? + -

Extra firm mattresses can be made with innerspring coils, memory foam, latex or hybrid constructions. The materials and layering determine the mattress’s feel, flexibility and surface comfort.

How does an extra firm mattress feel compared with other firmness levels? + -

Extra firm mattresses generally feel more solid and less conforming than medium or plush mattresses. They typically have less sink and surface cushioning, while softer models provide a more cradling feel.

What should I look for during a 4th of July extra firm mattress ? + -

Compare firmness descriptions, construction, comfort layers and included features across extra firm mattresses. Review the details carefully to find a model that matches your preferred feel and sleep setup.