Cal King High Density Coil Mattresses

Explore Cal King High Density Coil Mattresses at Mattress Firm to find a spacious sleep option that fits your bedroom and comfort preferences. Browse available sizes, comfort levels and mattress types to help create a sleep space that supports better zzz's and makes sleep easy™.

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Serta Perfect Sleeper Nurture Night 12" Firm Mattress

1186

Starting at

$859⁰⁰

$999⁰⁰

$140 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 Charlotte 2.0 Medium Euro Top Mattress

2615

Starting at

$839⁹⁹

$1499⁹⁹

$660 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

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

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" Plush Pillow Top Mattress

2784

Starting at

$819⁹⁹

$1499⁹⁹

$680 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

3296

Starting at

$709⁹⁹

$1699⁹⁹

$990 OFF

Extra Firm Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 11.25" Firm Mattress

2233

Starting at

$619⁹⁹

$1299⁹⁹

$680 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Stearns & Foster Estate 14.5" Firm Mattress

1809

Starting at

$2799⁰⁰

$3099⁰⁰

$300 OFF

Firm Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

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-C 13.75" Extra Firm Mattress

1810

Starting at

$859⁹⁹

$1999⁹⁹

$1140 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

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

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

Sealy Essentials Winter Green 13" Plush Euro Pillow Top Mattress

548

Starting at

$779⁹⁹

$1459⁹⁹

$680 OFF

Plush Comfort, best for

Side Sleepers
Bed Partner
Pain
Temperature
Toss and Turn
Allergies

Beautyrest BR800 12" Plush Euro Top Mattress

735

Starting at

$569⁹⁹

$1399⁹⁹

$830 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

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

Sealy Essentials Winter Green 12" Medium Euro Top Mattress

603

Starting at

$739⁹⁹

$1379⁹⁹

$640 OFF

Medium Comfort, best for

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

Beautyrest Silver BRS900 12" Plush Mattress

1140

Starting at

$729⁹⁹

$1699⁹⁹

$970 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Nurture Night 14.5" Pillow Top Mattress

1130

Starting at

$979⁰⁰

$1249⁰⁰

$270 OFF

Plush Comfort, best for

Side Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

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

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 12" Extra Firm Mattress

905

Starting at

$1109⁰⁰

$1399⁰⁰

$290 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Nurture Night 13.5" Plush Mattress

916

Starting at

$939⁰⁰

$1099⁰⁰

$160 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Winter Green 12" Plush Euro Top Mattress

393

Starting at

$739⁹⁹

$1379⁹⁹

$640 OFF

Plush Comfort, best for

Side Sleepers
Bed Partner
Pain
Temperature
Toss and Turn
Allergies

Serta Perfect Sleeper Midsummer Nights 11" Plush Eurotop Mattress

882

Starting at

$859⁰⁰

$999⁰⁰

$140 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Black Series Two 16.25" Plush Pillow Top Mattress

292

Starting at

$3699⁰⁰

$4099⁰⁰

$400 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

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.

California King high density coil mattresses offer a spacious sleep surface with the supportive feel many sleepers want from an innerspring design. Built with a greater concentration of steel coils than standard coil mattresses, these beds can provide more consistent support across the mattress while helping promote proper spinal alignment. A California King mattress is especially well suited for couples, taller sleepers and anyone who prefers extra room to stretch out, with its longer profile offering more legroom than a traditional king. Depending on the design, high density coils may be individually wrapped to help reduce motion transfer or connected to create a responsive, traditional mattress feel. Comfort layers made with memory foam, TEMPUR-Material™ or quilted cushioning can add pressure relief at the shoulders, hips and back while the coil system promotes airflow through the mattress. Choosing the right California King high density coil mattress starts with considering your preferred firmness, sleep position and comfort needs. Side sleepers may enjoy a plush or medium feel with cushioning that helps relieve pressure, while back and stomach sleepers often prefer a medium-firm or firm California King mattress for a more supportive sleep surface. Look for reinforced edges if you want to use the full surface of the bed or need easier access when getting in and out. A high density coil mattress can also be a smart choice for shoppers who appreciate strong support, responsive movement and a cooler-feeling sleep experience. Compare coil construction, comfort materials, edge support, mattress height and trial policies to find a California King innerspring mattress that helps you get better zzz's and live well.

What are high density coil mattresses made of? + -

High density coil mattresses feature a greater concentration of coils within the support core. They may also include comfort layers made from materials such as memory foam, latex or quilted fabric.

What is the difference between pocketed coils and innerspring coils? + -

Pocketed coils are individually wrapped in fabric, while traditional innerspring coils are connected with wires or helical coils. The construction affects the mattress's feel, support structure and motion characteristics.

What comfort materials are commonly used with high density coils? + -

Common comfort materials include memory foam, latex, fiber, quilted fabric and polyfoam. Each material can contribute a different feel, from contouring to a more responsive surface.

How do I choose the right feel in a high density coil mattress? + -

Consider whether you prefer a plush, medium or firm surface, then compare the mattress's comfort layers and coil design. Trying different feels in a store can help you identify the construction that feels most comfortable to you.

How should I care for a high density coil mattress? + -

Use a compatible foundation, keep the mattress covered with a breathable protector and follow the care instructions provided by the manufacturer. Rotating the mattress may also be recommended, depending on its design.