Core Support Cal King Mattresses

Experience unparalleled comfort and stability with our collection of core support cal king mattresses, designed to elevate your sleep to new heights. Perfectly balancing spacious luxury with essential support, these mattresses cater to those who crave a restful night's sleep without compromise. Ideal for larger bedrooms, the California King size provides ample room for stretching out, while the core support system ensures that your body is cradled in optimal alignment. Explore our selection and discover how core support cal king mattresses can transform your nightly routine into a rejuvenating escape.

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Sleepy's Rest Medium Innerspring Mattress

6549

Starting at

$470⁹⁹

Medium Comfort, best for

Back;Side;Stomach Sleepers
Pain

Sleepy's Rest Firm 2.0 Innerspring Mattress

6549

Starting at

$470⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain

Beautyrest Greenwood 10.5" Firm Mattress

3226

Starting at

$520⁹⁹

$1300⁹⁹

$780 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Beautyrest BR800 13.5" Plush Pillow Top Mattress

2444

Starting at

$800⁹⁹

$1500⁹⁹

$700 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner

FREE ADJUSTABLE BASE ³ up to 499 value with code ELEVATE (must add base to cart)

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

2711

Starting at

$710⁹⁹

$1700⁹⁹

$990 OFF

Extra Firm Comfort, best for

Back;Stomach Sleepers
Bed Partner
Pain
Temperature

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Beautyrest BR800 11.25" Firm Mattress

1682

Starting at

$615⁹⁹

$1300⁹⁹

$685 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Toss and Turn
Pain
Bed Partner

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Stearns & Foster Estate 14.5" Firm Mattress

1049

Starting at

$2799⁰⁰

$2999⁰⁰

$200 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Bed Partner
Pain
Temperature

Receive $300 Instant Gift⁴ with purchase.

Serta Perfect Sleeper Sleep Excellence Plush Mattress

672

Starting at

$1100⁹⁹

$1700⁹⁹

$600 OFF

Plush Comfort, best for

Side Sleepers
Pain
Toss and Turn
Pain

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Sealy Essentials Sudley 8.5" Firm Mattress

935

Starting at

$400⁹⁹

$1000⁹⁹

$600 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Pain

Beautyrest BR800 13.5" Medium Pillow Top Mattress

1583

Starting at

$800⁹⁹

$1500⁹⁹

$700 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Toss and Turn
Pain
Bed Partner

FREE ADJUSTABLE BASE ³ up to 499 value with code ELEVATE (must add base to cart)

Beautyrest Silver BRS900-C 13.75" Extra Firm Mattress

1493

Starting at

$855⁹⁹

$2000⁹⁹

$1145 OFF

Extra Firm Comfort, best for

Back;Stomach Sleepers
Bed Partner
Pain
Temperature

FREE ADJUSTABLE BASE ³ up to 499 value with code ELEVATE (must add base to cart)

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1447

Starting at

$800⁹⁹

$1000⁹⁹

$200 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Bed Partner
Pain
Temperature

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Purple Original Mattress

26764

Starting at

$1799⁰⁰

$1999⁰⁰

$200 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Pain
Temperature
Allergies

Pressuresmart MF 12.5" Firm Mattress

184

Starting at

$1850⁹⁹

$2600⁹⁹

$750 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Sleepy's By Sealy Slumber Cushion Firm Mattress

237

Starting at

$560⁹⁹

$2000⁹⁹

$1440 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Bed Partner
Toss and Turn
Pain

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Beautyrest BR800 12" Plush Euro Top Mattress

591

Starting at

$570⁹⁹

$1400⁹⁹

$830 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner

FREE ADJUSTABLE BASE ³ up to 499 value with code ELEVATE (must add base to cart)

Sealy Essentials Winter Green 12" Medium Euro Top Mattress

550

Starting at

$690⁹⁹

$1380⁹⁹

$690 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Pain
Allergies
Temperature

Sleepy's By Sealy Premium Memory Foam Mattress

153

Starting at

$1150⁹⁹

$2300⁹⁹

$1150 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Beautyrest Silver BRS900 12" Plush Mattress

779

Starting at

$730⁹⁹

$1700⁹⁹

$970 OFF

Plush Comfort, best for

Side Sleepers
Bed Partner
Pain
Temperature

FREE ADJUSTABLE BASE ³ up to 499 value with code ELEVATE (must add base to cart)

Serta Perfect Sleeper Nurture Night 14.5" Pillow Top Mattress

776

Starting at

$917⁹⁹

$1249⁰⁰

$332 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Serta Perfect Sleeper Elkins III 10" Firm Mattress

1536

Starting at

$512⁹⁹

$1200⁹⁹

$688 OFF

Firm Comfort, best for

Back;Stomach Sleepers
Pain
Temperature
Toss and Turn

Tulo 12" Medium Firm Cooling Hybrid Mattress

140

Starting at

$567⁹⁹

$1450⁹⁹

$883 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Temperature
Pain
Bed Partner

Tulo 10" Medium Cooling Hybrid Mattress

119

Starting at

$437⁹⁹

$1250⁹⁹

$813 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Temperature
Pain
Bed Partner

Tulo 11" Medium Firm Cooling Hybrid Mattress

198

Starting at

$492⁹⁹

$1300⁹⁹

$808 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Temperature
Pain
Bed Partner

Pressuresmart MF 15" Plush Euro Top Mattress

Starting at

$1900⁹⁹

$2400⁹⁹

$500 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ up to 499 value with code ELEVATE (must add base to cart)

Tulo 13" Medium Firm Cooling Hybrid Mattress

162

Starting at

$562⁹⁹

$1500⁹⁹

$938 OFF

Medium Comfort, best for

Back;Side;Stomach Sleepers
Temperature
Pain
Bed Partner

Core Support Cal King Mattresses

Choosing a Cal King mattress with core support is a meaningful investment in your nightly comfort and long-term well-being. The California King size, with its generous length, is an ideal fit for taller individuals or couples who enjoy the extra legroom and personal space it offers. Core support technology in these mattresses is designed to provide a stable, responsive foundation that keeps your body aligned and supported throughout the night, from the curve of your lower back to the arches of your feet. For those who experience back discomfort or simply crave that “just right” blend of cushioning and firmness, a core support mattress can make a remarkable difference. Imagine unwinding after a long day, sinking into a mattress that gently cradles your pressure points while maintaining the integrity of your spine. Whether you’re a side sleeper who needs extra hip and shoulder support, a back sleeper searching for a sturdy base, or a combination sleeper who moves throughout the night, the right core support Cal King mattress adapts to your needs, helping you wake up feeling refreshed and ready for the day ahead.

This time of year, as summer transitions into fall, it’s natural to think about upgrading your sleep setup. The lingering warmth of August evenings gives way to cooler nights, making it the perfect season to refresh your bedding and invest in a mattress that can support you through every season. A core support Cal King mattress is a thoughtful gift for newlyweds setting up their first home, parents looking to upgrade the family bedroom, or anyone celebrating a milestone birthday or anniversary. Its spacious dimensions and advanced support systems can transform a master bedroom into a true sanctuary, inviting you to stretch out, relax, and enjoy restorative rest. Picture cozy autumn mornings spent lounging in bed, reading the paper or sharing breakfast, all while supported by the balanced comfort of a well-crafted mattress. These mattresses are also a smart choice for guest rooms, providing visitors with a luxurious and supportive sleep experience that rivals a five-star hotel. For those who cherish quality time with loved ones—whether that means movie nights with the kids, lazy Sunday mornings with a partner, or simply soaking in some peaceful solitude—a Cal King mattress with core support offers the space and comfort to make every moment memorable.

When browsing options, consider the unique features that set core support mattresses apart, such as reinforced center zones, responsive coils, or high-density foam layers that resist sagging and prolong mattress life. These elements work together to deliver consistent support, night after night, helping to minimize motion transfer and maintain comfort for years to come. If you’re curious about the full range of options available, you can explore more on our dedicated Core Support Mattresses page, where you’ll find detailed information on the latest innovations in sleep technology. Investing in a core support Cal King mattress is more than just upgrading your bed—it’s about creating a foundation for better sleep, improved health, and more enjoyable mornings. With the right mattress, every night becomes an opportunity to recharge and every morning a chance to start fresh, supported by a bed that truly meets your needs.