Breathable King Size Medium Mattresses

Breathable king size medium mattresses offer the ideal balance of comfort and support for those who value restful, uninterrupted sleep. Designed to fit spacious king beds, these mattresses provide ample room to stretch out while helping maintain a comfortable sleep environment throughout the night. Whether you prefer a mattress that feels just right—not too firm, not too soft—exploring breathable king size medium mattresses is a great way to enhance your nightly routine and wake up feeling refreshed. Discover options that make it easy to find your perfect fit for better zzz’s every night.

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Sleepy's By Sealy Memory Foam Medium Mattress

3381

Starting at

$1330⁹⁹

Medium Comfort, best for

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

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

1407

Starting at

$1300⁹⁹

$2000⁹⁹

$700 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tempur-Pedic TEMPUR-Adapt 11" Medium Previous Generation Mattress

3576

Starting at

$2030⁷⁷

$2899⁰⁰

$869 OFF

Medium Comfort, best for

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

Beautyrest PressureSmart 2.0 Hybrid Medium 13" Mattress

1756

Starting at

$1475⁰⁰

$2950⁹⁹

$1475 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 13.5" Medium Pillow Top Mattress

1842

Starting at

$750⁹⁹

$1500⁹⁹

$750 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1721

Starting at

$750⁹⁹

$1000⁹⁹

$250 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Purple Original Mattress

30196

Starting at

$2049⁰⁰

$2199⁰⁰

$150 OFF

Medium Comfort, best for

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

Sleepy's By Sealy Slumber Cushion Firm Mattress

280

Starting at

$560⁹⁹

$2000⁹⁹

$1440 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Stearns & Foster Lux Estate Elite 16" Medium Euro Pillow Top Mattress

953

Starting at

$4199⁰⁰

$4599⁰⁰

$400 OFF

Medium Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

Sleepy's By Sealy Slumber Medium Mattress

167

Starting at

$2300⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Nectar Premier 13" Medium Memory Foam Mattress

410

Starting at

$1099⁰⁰

$1799⁰⁰

$700 OFF

Medium Comfort, best for

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

Serta Perfect Sleeper Nurture Night 13.5" Medium Mattress

977

Starting at

$879²⁰

$1099⁰⁰

$220 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Oasis Sleep 14.5" Pillow Top Mattress

970

Starting at

$1078⁹⁹

$1399⁰⁰

$321 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Black Series Two 16.5" Medium Pillow Top Mattress

290

Starting at

$3799⁰⁰

$4099⁰⁰

$300 OFF

Medium Comfort, best for

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

$300 ⁶ adjustable base instant gift with purchase.

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

5744

Starting at

$4099⁰⁰

Medium Comfort, best for

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

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

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Medium Mattress

3758

Starting at

$4099⁰⁰

Medium Comfort, best for

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

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

Breathable king size medium mattresses offer the perfect combination of comfort, support, and temperature regulation for a truly restorative night’s sleep. Designed with airflow-enhancing materials such as gel-infused memory foam, breathable latex, or open-cell foam structures, these mattresses help prevent overheating by promoting constant air circulation. This makes them an excellent choice for sleepers who tend to get hot at night or live in warmer climates. The king size format provides ample space for couples or anyone who wants more room to stretch out, while the medium firmness level delivers just the right blend of cushioning comfort and balanced support—ideal for a wide range of sleeping positions including back, side, and combination sleepers.

Opting for a breathable king size medium mattress not only supports cooling sleep but also promotes freshness and reduces moisture build-up—key factors in achieving high-quality rest. Many models feature specialized covers made of moisture-wicking fabrics like Tencel® or CoolTouch™, further enhancing breathability throughout the night. For allergy sufferers or those concerned with hygiene, some breathable king size medium mattresses are constructed with hypoallergenic materials that resist dust mites and other allergens. Investing in a mattress that prioritizes airflow can extend the life of your bed by preventing mold and mildew growth and ensuring long-lasting performance. Explore Mattress Firm’s curated selection to find the perfect breathable king size medium mattress tailored to your unique sleeping needs.

What makes a king size medium mattress breathable? + -

A breathable king size medium mattress is designed with materials and construction techniques that promote airflow and help regulate temperature. Features like open-cell foams, ventilated layers, and moisture-wicking fabrics allow heat and moisture to dissipate, keeping you cooler throughout the night.

Are breathable king size medium mattresses suitable for hot sleepers? + -

Yes, breathable king size medium mattresses are an excellent choice for hot sleepers. Their enhanced airflow and temperature-regulating properties help prevent heat buildup, providing a cooler and more comfortable sleep environment.

What materials are commonly used in breathable king size medium mattresses? + -

Common materials include gel-infused memory foam, latex, pocketed coils with airflow channels, and covers made from natural fibers like cotton or bamboo. These materials work together to enhance breathability and comfort.

How does a medium firmness level affect the breathability of a mattress? + -

Medium firmness offers balanced support without excessive sinkage, which can improve airflow around your body. This helps maintain the mattress's breathability while still providing comfort and pressure relief.

Can a breathable king size medium mattress help reduce night sweats? + -

A breathable king size medium mattress can help minimize night sweats by allowing heat and moisture to escape more efficiently. This creates a cooler sleeping surface that may reduce discomfort caused by overheating during the night.