Labor Day Sale On King Size Extra Firm Mattresses

Shop the Labor Day On King Size Extra Firm Mattresses at Mattress Firm to explore a range of options for your bedroom. Browse available sizes and styles, compare prices and find a mattress that fits your sleep preferences and budget.

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Beautyrest Silver BRS900-C 13.75" Extra Firm Mattress

1810

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

Beautyrest PressureSmart 2.0 Extra Firm 13.5" Mattress

2187

Starting at

$1449⁹⁹

$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

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

3296

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

Serta Perfect Sleeper Oasis Sleep 12" Extra Firm Mattress

905

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

955

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

Stearns & Foster Estate 13.5" Extra Firm Mattress

1058

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

897

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

697

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

270

Starting at

$2649⁰⁰

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.

A Labor Day is a smart time to shop for a king size extra firm mattress that delivers spacious comfort and dependable support. Designed for sleepers who prefer a solid, supportive feel, an extra firm king mattress can help create a stable sleep surface while giving couples plenty of room to stretch out. Explore options with supportive coil systems, durable foam layers and breathable materials to find a king size mattress that suits your preferred comfort level. Whether you are replacing an aging mattress or upgrading to a larger sleep space, Labor Day mattress can make it easier to compare extra firm mattresses from trusted brands at an exceptional value. Mattress Firm makes it simple to find the right king size extra firm mattress for your bedroom and sleep style. Compare mattress features, dimensions and comfort technologies to discover a supportive option that helps you sleep well so you can live well. Shop Labor Day mattress for king mattresses, adjustable bases, pillows and other bedroom essentials, then take advantage of expert guidance, convenient delivery options and flexible ways to shop. With the right king size extra firm mattress, you can enjoy a spacious sleep surface and the firm, steady feel you prefer night after night.

What is an extra firm mattress made of? + -

Extra firm mattresses may feature foam, innersprings or a combination of both. Their construction varies by model, so review the product details to learn about the comfort layers, support system and upholstery materials.

How does an extra firm mattress feel? + -

An extra firm mattress has a highly supportive feel with minimal cushioning and less sink than softer comfort levels. The surface feel can vary based on its materials and design.

What bedding works well with an extra firm mattress? + -

Choose sheets and bedding made from breathable, flexible materials that fit the mattress depth. A mattress protector can also help keep the surface clean and comfortable.

How do I care for an extra firm mattress? + -

Use a compatible foundation, rotate the mattress according to the manufacturer’s instructions and protect it with a mattress protector. Regularly check the care guidelines for cleaning recommendations.

What should I look for during a Labor Day on extra firm mattresses? + -

Compare mattress construction, comfort layers, support systems and included features. Reading product details and customer reviews can help you find an extra firm design that matches your preferences.