12 5 Inch Foam Mattresses

Explore 12 5 Inch Foam Mattresses at Mattress Firm to find options for your bedroom, guest room or sleep space. Browse available sizes, prices and styles to compare foam mattresses and choose the right fit for your home.

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Serta Perfect Sleeper Nurture Night 12" Firm Mattress

1188

Starting at

$699⁰⁰

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Nectar Classic 12" Firm Memory Foam Mattress

232

Starting at

$599⁰⁰

$949⁰⁰

$350 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Serta Perfect Sleeper Oasis Sleep 12" Extra Firm Mattress

905

Starting at

$979⁰⁰

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Winter Green 12" Plush Euro Top Mattress

393

Starting at

$849⁹⁹

Plush Comfort, best for

Side Sleepers
Bed Partner
Pain
Temperature
Toss and Turn
Allergies

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Medium Hybrid Mattress

5990

Starting at

$3099⁰⁰

$3499⁰⁰

$400 OFF

Medium Comfort, best for

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

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

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Firm Mattress

5005

Starting at

$3099⁰⁰

$3499⁰⁰

$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

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Medium Mattress

3865

Starting at

$3099⁰⁰

$3499⁰⁰

$400 OFF

Medium Comfort, best for

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

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

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Soft Mattress

3498

Starting at

$2949⁰⁰

$3349⁰⁰

$400 OFF

Plush Comfort, best for

Side Sleepers
Pain
Allergies
Bed Partner
Toss and Turn
Temperature

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

Tempur-Pedic TEMPUR-ProAdapt 12" Firm Previous Generation Mattress

6690

Starting at

$2029⁷⁷

$2899⁰⁰

$869 OFF

Firm Comfort, best for

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

Tempur-Pedic TEMPUR-ProAdapt 12" Medium Previous Generation Mattress

6549

Starting at

$2379⁷⁷

$3399⁰⁰

$1019 OFF

Medium Comfort, best for

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

Serta Classic Blissville 12.5" Firm Mattress

302

Starting at

$1329⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Classic Blissville 12.5" Plush Euro Top Mattress

274

Starting at

$1349⁹⁹

Plush Comfort, best for

Side Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beauty Sleep® Midnight Dream II 12.5" Firm Mattress

199

Starting at

$669⁹⁹

$1449⁹⁹

$780 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Bed Partner
Temperature
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beauty Sleep® Midnight Dream 12.5" Firm Mattress

171

Starting at

$669⁹⁹

$1449⁹⁹

$780 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Bed Partner
Temperature
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Nectar Classic 12" Firm Hybrid Mattress

108

Starting at

$749⁰⁰

$899⁰⁰

$150 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Beautyrest Black Hybrid Series One 12.5" Firm Mattress

Starting at

$2499⁰⁰

$2899⁰⁰

$400 OFF

Firm Comfort,

Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Sierra Sleep By Ashley Peak 2.0 12" Hybrid Mattress

Starting at

$574⁹⁹

$1674⁹⁹

$1100 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Toss and Turn

Beautyrest Black Hybrid Series One 12.5" Plush Mattress

Starting at

$1549⁰⁰

$1949⁰⁰

$400 OFF

Plush Comfort,

Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Sealy Ellenton II 12" Medium Mattress

Starting at

$1049⁰⁰

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Allergies

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest PressureSmart 2.0 Plush 11.75" Mattress

6252

Starting at

$1149⁹⁹

$2299⁹⁹

$1150 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

3298

Starting at

$1399⁹⁹

Extra Firm Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tulo Bamboo 12" Medium Plush Green Tea Memory Foam Mattress

5562

Starting at

$789⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1746

Starting at

$749⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 12" Plush Euro Top Mattress

737

Starting at

$979⁹⁹

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Winter Green 12" Medium Euro Top Mattress

604

Starting at

$879⁹⁹

Medium Comfort, best for

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

Beautyrest Silver BRS900 12" Plush Mattress

1144

Starting at

$1699⁹⁹

Plush Comfort, best for

Side Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

A five-inch foam mattress can be a practical choice for guest rooms, bunk beds, daybeds, platform beds and other spaces that need a compact sleep solution. Designed with layers of responsive or supportive foam, these mattresses can help cushion pressure points while maintaining a streamlined profile that works well in rooms with limited space. A 5-inch foam mattress may also be a convenient option for children, occasional sleepers or shoppers seeking an affordable mattress for a secondary bedroom. Compare mattress materials, firmness levels, weight limits and the recommended foundation to find a model that delivers the right balance of comfort and support. Before purchasing a five-inch memory foam mattress or all-foam mattress, consider your preferred sleep position and the mattress’s overall construction. Side sleepers may appreciate a slightly softer feel that helps relieve pressure around the shoulders and hips, while back and stomach sleepers often prefer a firmer surface for a more supportive feel. A breathable cover, cooling foam and durable construction can also contribute to a more comfortable night’s sleep. Pair your new foam mattress with a compatible bed frame or solid foundation, allow a mattress-in-a-box to fully expand according to the manufacturer’s instructions and use a waterproof mattress protector to help keep the sleep surface fresh for years to come.

What is a foam mattress made of? + -

A foam mattress typically includes one or more layers of foam designed to provide cushioning and support. Common materials include memory foam, polyfoam and gel-infused foam.

What types of foam are used in these mattresses? + -

Common foam types include memory foam for contouring comfort, polyfoam for a responsive feel and gel-infused foam for added temperature-conscious design.

How do I choose the right feel in a foam mattress? + -

Consider whether you prefer a softer, more cushioning feel or a firmer, more supportive surface. Your preferred sleep position and personal comfort preferences can also help guide your choice.

How should I care for a foam mattress? + -

Use a compatible foundation, rotate the mattress when recommended and protect it with a breathable mattress protector. Always follow the care instructions provided with the mattress.

Can a foam mattress be used with an adjustable base? + -

Some foam mattresses are compatible with adjustable bases. Check the mattress and base specifications to confirm compatibility before pairing them.