Modern Full-Size Firm Mattress

Explore a selection of modern full-size firm mattresses to find the right fit for your bedroom, sleep preferences and budget. Shop options in a full-size mattress dimension with a firm feel, and compare styles to make sleep easy™.

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Serta Perfect Sleeper Oasis Sleep 14.5" Firm Pillow Top Mattress

1178

Starting at

$819⁰⁰

$979⁰⁰

$160 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Nurture Night 12" Firm Mattress

1186

Starting at

$609⁰⁰

$679⁰⁰

$70 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beauty Sleep® Midnight Dream 12.5" Firm Mattress

171

Starting at

$439⁹⁹

$1129⁹⁹

$690 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Bed Partner
Temperature
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Firm Mattress

4992

Starting at

$2949⁰⁰

$3349⁰⁰

$400 OFF

Firm Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase + Calm app 3-month free trial

Beautyrest BR800 Greenwood 11.25" Firm Mattress

1695

Starting at

$959⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Bed Partner
Toss and Turn
Temperature
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's Hybrid Clearance 11" Firm Mattress

1562

Starting at

$399⁹⁹

$1519⁹⁹

$1120 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Toss and Turn
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Spruce 5.5" Firm Mattress

1371

Starting at

$424⁹⁹

$699⁹⁹

$275 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

Beautyrest Black Series Three 14.25" Extra Firm Mattress

284

Starting at

$3129⁰⁰

$3729⁰⁰

$600 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Beautyrest PressureSmart 2.0 Firm 11" Mattress

Starting at

$749⁹⁹

$1499⁹⁹

$750 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Nectar Classic 12" Firm Memory Foam Mattress

231

Starting at

$599⁰⁰

$949⁰⁰

$350 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Purple RestorePlus 13" Firm Hybrid Mattress

1667

Starting at

$2860⁰⁰

$3499⁰⁰

$639 OFF

Firm Comfort, best for

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

Kingsdown Crown Imperial 16" Firm Euro Top Mattress

125

Starting at

$4399⁰⁰

$5799⁰⁰

$1400 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's Basic Memory Foam Firm Mattress

3213

Starting at

$239⁷⁷

$799⁹⁹

$560 OFF

Firm Comfort, best for

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

Sleepy's Basic Innerspring Firm Mattress

8676

Starting at

$249⁹⁹

Firm Comfort, best for

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

Sleepy's Rest Firm 2.0 Innerspring Mattress

7001

Starting at

$449⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Beautyrest BR800 11.25" Firm Mattress

2233

Starting at

$469⁹⁹

$959⁹⁹

$490 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

A modern full-size firm mattress combines supportive comfort with a clean, contemporary look that suits today’s bedrooms. Also called a double mattress, a full-size mattress typically measures about 54 inches wide by 75 inches long, offering more sleeping space than a twin mattress while fitting comfortably in smaller bedrooms, guest rooms, apartments and studio spaces. Its firm sleep surface can help promote a more supportive feel for back and stomach sleepers, couples who prefer a sturdier mattress and anyone who enjoys sleeping on top of the bed instead of sinking deeply into it. Explore modern full-size firm mattresses with breathable covers, responsive foam, supportive innerspring systems or hybrid designs to find the comfort and construction that match your sleep style The best full-size firm mattress for your space should provide steady support from edge to edge while complementing your modern bedroom furniture and décor. Look for features such as individually wrapped coils, pressure-relieving comfort layers, reinforced edges and cooling materials designed to help maintain a comfortable sleep temperature throughout the night. A firm full mattress can also be a practical choice for a guest bedroom because its versatile size accommodates one or two sleepers without taking up the space of a queen or king mattress. Mattress Firm offers full-size firm mattresses from trusted brands in a range of materials and price points, making it easier to compare mattress construction, firmness, height and comfort features before choosing the right fit for better zzz's.getResponse?

What defines a modern firm mattress? + -

A modern firm mattress has a supportive feel with minimal sinkage, often combining responsive foams, individually wrapped coils or both. Its design may also include breathable materials and durable comfort layers for a balanced sleep experience.

What materials are commonly used in a modern firm mattress? + -

Modern firm mattresses may feature memory foam, latex, gel-infused foam, innerspring coils or hybrid combinations. The materials work together to create a stable feel while adding comfort and airflow.

How does a firm mattress feel compared with a plush mattress? + -

A firm mattress typically feels more supportive and responsive with less body sinkage. A plush mattress has softer comfort layers that allow more cushioning and contouring.

What type of foundation works with a modern firm mattress? + -

A modern firm mattress generally pairs well with a sturdy platform bed, adjustable base or foundation designed for mattress support. Always review the mattress care guidelines to confirm the recommended foundation type.

How can I keep a modern firm mattress in good condition? + -

Use a breathable mattress protector, keep the sleep surface clean and follow the care instructions provided with the mattress. Avoid folding or bending it unless the manufacturer specifically says it is allowed.