Breathable California King Size Medium Mattresses

Find a comfortable fit for your sleep space with Breathable California King Size Medium Mattresses. Explore a range of medium-feel mattresses in a spacious California king size to help you find the right match for your bedroom, sleep preferences and budget.

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Sleepy's By Sealy Memory Foam Medium Mattress

3474

Starting at

$589⁹⁹

$889⁹⁹

$300 OFF

Medium Comfort, best for

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

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

1433

Starting at

$1999⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 13.5" Medium Pillow Top Mattress

1863

Starting at

$819⁹⁹

$1499⁹⁹

$680 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1745

Starting at

$809⁹⁹

$1099⁹⁹

$290 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Purple Original Mattress

59743

Starting at

$1760⁰⁰

$2199⁰⁰

$439 OFF

Medium Comfort, best for

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

Sleepy's By Sealy Slumber Cushion Firm Mattress

301

Starting at

$1999⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

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

981

Starting at

$4099⁰⁰

$4699⁰⁰

$600 OFF

Medium Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

Sleepy's By Sealy Slumber Medium Mattress

175

Starting at

$709⁹⁹

$2299⁹⁹

$1590 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Nectar Premier 13" Medium Memory Foam Mattress

486

Starting at

$1099⁰⁰

$1799⁰⁰

$700 OFF

Medium Comfort, best for

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

Nectar Luxe 14" Medium Memory Foam Mattress

238

Starting at

$1649⁰⁰

$2249⁰⁰

$600 OFF

Medium Comfort, best for

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

Serta Perfect Sleeper Nurture Night 13.5" Medium Mattress

1020

Starting at

$939⁰⁰

$1099⁰⁰

$160 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Oasis Sleep 14.5" Pillow Top Mattress

1009

Starting at

$1139⁰⁰

$1399⁰⁰

$260 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Black Series Two 16.5" Medium Pillow Top Mattress

293

Starting at

$3699⁰⁰

$4099⁰⁰

$400 OFF

Medium Comfort, best for

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

$300 ⁶ adjustable base instant gift with purchase.

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

5970

Starting at

$3799⁰⁰

$4199⁰⁰

$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" Medium Mattress

3858

Starting at

$3799⁰⁰

$4199⁰⁰

$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-Adapt 2.0 11" Medium Mattress

3651

Starting at

$2799⁰⁰

$2999⁰⁰

$200 OFF

Medium Comfort, best for

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

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

A breathable California King size medium mattress offers a spacious sleep surface with balanced support and airflow-enhancing comfort. Measuring approximately 72 by 84 inches, a California King mattress provides extra length for taller sleepers while giving couples room to move without feeling crowded. Medium-firm comfort can help create a supportive, adaptable feel for back, side and combination sleepers, while breathable materials such as ventilated foams, individually wrapped coils, moisture-managing covers and cooling comfort layers may help promote a more comfortable sleep environment. Explore California King size medium mattresses with features designed to encourage airflow, reduce heat buildup and provide the pressure relief you need for restful zzz's. Finding the right breathable California King mattress starts with considering your preferred sleep position, support needs and temperature preferences. Hybrid mattresses with pocketed coils can help increase airflow through the mattress, while gel-infused or open-cell foam may offer contouring comfort with a more breathable feel than traditional dense foam. A medium California King mattress can also be a versatile choice for couples with different comfort preferences, providing a middle-of-the-road balance between cushioning and support. Shop Mattress Firm for breathable California King size medium mattresses from trusted brands, then compare cooling technologies, mattress materials and available comfort options to find the sleep setup that helps you sleep well so you can live well.

What makes a medium mattress breathable? + -

Breathable mattresses typically use airflow-friendly materials and designs, such as ventilated foam, breathable fibers, innerspring coils or moisture-managing covers. These features can help promote air circulation through the sleep surface.

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

Common materials include breathable cotton or fiber covers, ventilated memory foam, latex and individually wrapped coils. Some mattresses combine several of these materials in a layered design.

How does a medium feel compare with softer or firmer mattresses? + -

A medium feel generally offers a balance of cushioning and support. It may feel less enveloping than a softer mattress and more cushioned than a firmer mattress, though the exact feel can vary by construction and personal preference.

Are breathable medium mattresses available with different support systems? + -

Yes. Breathable medium mattresses may feature all-foam, hybrid or innerspring constructions. Hybrid and innerspring designs often include coil systems that allow air to move through the mattress, while all-foam models may use ventilated foam and breathable covers.

How can I care for a breathable medium mattress? + -

Use a breathable mattress protector, rotate the mattress if the manufacturer recommends it and keep the sleep surface free of heavy items when it is not in use. Follow the care instructions provided with the mattress for cleaning and maintenance.