Name: Serta® Perfect Sleeper® Cobalt Calm 12" Wrapped Coil Extra Firm Tight Top California King Mattress
Brand: Serta Perfect Sleeper
SKU: 1284275
Availability: OutOfStock
Rating: 4.6 (1284 reviews)

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Default Dev Script Validation

Serta® Perfect Sleeper® Cobalt Calm Extra Firm Tight Top Twin Mattress-1

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Say hello to your simple solution for perfect sleep every night.

Serta Perfect Sleeper

Serta® Perfect Sleeper® Cobalt Calm Innerspring Extra Firm Tight Top California King Mattress-2

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Mattress Delivery What To Expect with Captions

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Serta® Perfect Sleeper® Cobalt Calm Extra Firm Tight Top Twin Mattress-3

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Serta® Perfect Sleeper® Cobalt Calm Innerspring Extra Firm Tight Top Twin Mattress-5

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Serta® Perfect Sleeper® Cobalt Calm Innerspring Extra Firm Tight Top Twin Mattress-3

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Serta® Perfect Sleeper® Cobalt Calm Innerspring Extra Firm Tight Top Twin Mattress-7

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Serta® Perfect Sleeper® Cobalt Calm 12" Wrapped Coil Extra Firm Tight Top California King Mattress

Cool Twist® Gel Foam - Cooling gel is swirled directly into a breathable foam designed to promote airflow and heat dissipation.

Cool Twist® Gel Memory Foam This unique design features cooling gel swirled into premium memory foam. This breathable memory foam helps enhance airflow and heat dissipation for a feeling that can only be described as a cool, contouring type of comfort.

PillowSoft® Aire Soft foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design.

3 Zoned Coil Design - This 850-coil density system offers three support zones with targeted support for your lower back and hips and cradled comfort everywhere else.

Gives the sensation of lying on top of the mattress with little give

Premium memory foam is temperature-sensitive; it may feel firmer in cooler temperatures and softer in warmer ones. For your preferred comfort, please allow several hours for your memory foam mattress to adjust to the room’s temperature

Meets Federal Fire Retardant Safety Standard

Serta has been in the sleep industry for over 90 years and has been dedicated the entire time to helping people like you find a solution to your sleep problems so you can finally sleep better than you ever have. We love helping people find their best sleep and this is why our brand exists. Serta has been in the sleep industry for over 90 years and has been dedicated the entire time to helping people like you find a solution to your sleep problems so you can finally sleep better than you ever have. We love helping people find their best sleep and this is why our brand exists.
We believe that mattress shopping shouldn’t be stressful. We also believe whether you are buying online or in-store, you should be comfortable during the entire purchase process. So no matter if you're a back, stomach or side sleeper or if you sleep at night or during the day, we have a product to help you get the sleep you deserve. Check out some of the things we’ve learned along the way that help us to continue to be able to bring new sleep innovations to the table.

*Mattress only, all other products sold separately. Images may not depict actual size.

SSB 2024 Black Friday Promo

Featuring a 3 zoned coil design, this mattress offers pressure relief and support where you need it, with a Cool Twist® Gel Memory Foam that contours to your body—with upgrades available with more cooling layers and support.

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Serta® Perfect Sleeper® Cobalt Calm 15" Wrapped Coil Plush Pillow Top Queen Mattress

Serta® Perfect Sleeper® Cobalt Calm 12" Wrapped Coil Extra Firm Tight Top King Mattress

Serta® Perfect Sleeper® Cobalt Calm 15" Wrapped Coil Plush Pillow Top King Mattress

Serta® Perfect Sleeper® Cobalt Calm 12" Wrapped Coil Extra Firm Tight Top Twin Mattress

Serta® Perfect Sleeper® Cobalt Calm 15" Wrapped Coil Plush Pillow Top Twin Mattress

Serta® Perfect Sleeper® Cobalt Calm 12" Wrapped Coil Extra Firm Tight Top Twin XL Mattress

Serta® Perfect Sleeper® Cobalt Calm 15" Wrapped Coil Plush Pillow Top Twin XL Mattress

Serta® Perfect Sleeper® Cobalt Calm 12" Wrapped Coil Extra Firm Tight Top Full Mattress

Serta® Perfect Sleeper® Cobalt Calm 15" Wrapped Coil Plush Pillow Top Full Mattress

Serta® Perfect Sleeper® Cobalt Calm 12" Wrapped Coil Extra Firm Tight Top Queen Mattress-1

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Serta Perfect Sleeper 

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Mattress Size:California King