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Serta 12" Cal King Perfect Sleeper Oasis Sleep Extra Firm Innerspring Mattress

4.7 stars out of 739 reviews

(4.7)|

Bed Size:California King

Mattress Top Type:Tight Top

Material:Mattress

Mattress Comfort Level:Extra Firm

Key item features

Firm Support: This extra firm innerspring mattress provides the sensation of lying on top with minimal give, featuring a 3-zoned coil design for targeted pressure relief and support.
Cooling Comfort: Cool Twist Gel Memory Foam, with cooling gel swirled into premium memory foam, enhances airflow and heat dissipation for a cool, contouring feel.
Breathable Foam: Cool Twist Gel Foam incorporates cooling gel into a breathable foam, specifically designed to promote airflow and dissipate heat.
Enhanced Cushioning: PillowSoft Aire soft foam offers enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design.
Odor Protection: Anti-Microbial Technology keeps the mattress fresh and clean by protecting against odor-causing bacteria.

Generated by AI

Specs

Mattress thickness
12 in
Mattress coil type
Pocketed
Mattress type
Innerspring Mattresses

Current price is $1,399.00

Price when purchased online

Free shipping

Walmart Accident Plan by Allstate

5-Year plan - $78.00

How do you want your item?

Columbus, 43215

Arrives between Feb 28 - Mar 4

Sold and shipped by Serta Simmons Bedding LLC

4.0852941176470585 stars out of 5, based on 340 seller reviews(4.1)

Report an issue with this seller

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About this item

Product details

The Serta Perfect Sleeper Oasis Sleep features a 3 zoned coil design, this Adult mattress offers pressure relief and support right where you need it, with a Cool Twist® Gel Memory Foam that contours to your body & keeps it cool. 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—with upgrades available with more cooling layers and support.

Made to Order in the USA – Expertly crafted and assembled in U.S. factories using a blend of American-made and imported materials, guaranteeing exceptional quality and care.
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
PillowSoft® Aire Soft foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design
Anti-Microbial Technology - Our anti-microbial mattress technology will keep your mattress fresh and clean from odor-causing bacteria
You should be able to rely on the quality of your rest night after night. That is why we offer a 10-year limited warranty that covers manufacturing and workmanship defects. If you do notice anything out of the ordinary, simply email us or call us at 1-888-557-3782 and we’ll work with you to find a solution.
Gives the sensation of lying on top of the mattress with little give

To view the product law label, visit: https://prod.globalrsinc.com/LawLabelLookup/Walmart and enter [747935962934]

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We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.

Specifications

Mattress thickness

12 in

Mattress coil type

Pocketed

Mattress type

Innerspring Mattresses

Brand

Serta

Warranty

Warranty information

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Warranty url

https://www.serta.com/pages/warranty

Customer ratings & reviews

4.7 out of 5 stars

stars739 ratings587 reviews

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Showing 1-3 of 587 reviews

Dec 30, 2025

HappyShopper

Top Reviewer

Item details

Bed size: Queen

Mattress top type: Pillow Top

Material: Mattress with 5.5in foundation

Mattress comfort level: Firm

Sold and shipped bySerta Simmons Bedding LLC

5 out of 5 stars review

Verified Purchase

It was suggested that slats on the rails were not needed but that was not the case in our setup. The mattress was bowing in the middle! You had to literally crawl out of the bed to get up from the bed. Once we placed the slats back on the rails, the problem was solved. The mattress is now firm nd comfortable!

Helpful?

Feb 6, 2026

Jeremy

Item details

Bed size: King

Mattress top type: Pillow Top

Material: Mattress

Mattress comfort level: Firm

Sold and shipped bySerta Simmons Bedding LLC

5 out of 5 stars review

Verified Purchase

GREAT NIGHT SLEEP

SERTA ARE SECOND TO NONE

Helpful?

Jul 25, 2025

Virginia

Item details

Bed size: Queen

Material: Mattress

Mattress comfort level: Medium

Sold and shipped bySerta Simmons Bedding LLC

5 out of 5 stars review

Verified Purchase

Comfortable

Very comfortable mattress, I have a back problem and this mattress makes it less severe.

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Serta 12" Cal King Perfect Sleeper Oasis Sleep Extra Firm Innerspring Mattress

Key item features

Specs

How do you want your item?

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