KOW Mattress California King Size 12 inch Memory Foam Hybrid Mattress in a Box, Medium
KOW Mattress California King Size 12 inch Memory Foam Hybrid Mattress in a Box, Medium
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KOW Mattress California King Size 12 inch Memory Foam Hybrid Mattress in a Box, Medium

4.3 stars out of 3432 reviews
(4.3)|
3,432 ratings
Bed Size:California King
Mattress Thickness:12 in
Mattress Comfort Level:Medium

Key item features

  • CertiPUR-US Certified: CertiPUR-US certified mattress made with skin-friendly materials, free from harmful substances like formaldehyde, fiberglass, and heavy metals.
  • Breathable Construction: Designed with a breathable construction to ensure a comfortable and cool sleeping environment.
  • Adjustable Base Compatible: Compatible with adjustable bases for versatile use and enhanced comfort.
  • Enhanced Edge Support: Reinforced edge support for stability and durability, suitable for adult use.
  • Low Motion Transfer: Features low motion transfer to minimize disturbances from a partner's movements during sleep.
  • Convenient Packaging: Mattress compressed, rolled, and shipped in a box for easy setup and transportation through narrow spaces.
  • 7-Zone Support: Equipped with hundreds of pocket springs providing 7-zone targeted support for ergonomic alignment and all-night comfort.
  • Medium Soft Comfort: 12-inch California King size memory foam hybrid mattress with a medium soft feel for optimal body support and comfort.
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Current price is Now $239.99
You save $250.00
was $489.99
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Sold by Koala FurniturePro Seller
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4.380184331797235 stars out of 5, based on 868 seller reviews(4.4)
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Comparison Chart:
Mattress Top TypePillow TopKOW Mattress California King Size 12 inch Memory Foam Hybrid Mattress in a Box, MediumEuro TopFull Mattress, 10 Inch Pocket Spring and Memory Foam Mattress in a Box, Pressure Relief, Full SizeEuro TopMocangtu 12" Queen Hybrid Mattress in a Box, Gel Memory Foam with Individually Wrapped Pocket Coils, Medium Firm, Pressure Relief, Cooling Sleep SupportEuro TopSEEUO Queen Mattress,12 inch Hybrid Mattress in a Box with Memory Foam & Individual Pocket Spring for Edge Support,Pressure Relief,Medium Firm,CertiPUR-USEuro TopSailvan 12-Inch Queen Size Mattress in a Box, Hybrid Medium-Firm Support Mattress with Cooling Gel Memory Foam,Motion Isolation, CertiPUR-US Certification,and Pressure ReliefEuro TopSailvan Queen Mattress 12 inch,Purple Queen Size Mattress in a Box,Cooling Gel Infused Memory Foam and Pocket Hybrid Spring Mattress,Medium Firm,Pressure Relief,CertiPUR-USEuro TopYilicy 12 inch Queen Mattress in a Box, Spring Hybrid Memory Foam Medium Firm Mattress,AdultEuro TopGREOO Queen Size Mattress in a Box 12" Hybrid Cooling Gel Memory Foam with Individually Pocket Coils Firm Pressure Relief CertiPUR-USEuro TopWhite with Black Rim Mattress, 12 Inch Euro Top Mattress in a Box,Queen, Memory Foam Hybrid Mattress with individually Pocket Springs,MedEuro TopCICIMLU 12 inch Queen Mattress ,Hybrid Mattresses Medium Firm in a Box
Mattress TypeHybrid MattressesKOW Mattress California King Size 12 inch Memory Foam Hybrid Mattress in a Box, MediumInnerspring MattressesFull Mattress, 10 Inch Pocket Spring and Memory Foam Mattress in a Box, Pressure Relief, Full SizeHybrid MattressesMocangtu 12" Queen Hybrid Mattress in a Box, Gel Memory Foam with Individually Wrapped Pocket Coils, Medium Firm, Pressure Relief, Cooling Sleep SupportHybrid MattressesSEEUO Queen Mattress,12 inch Hybrid Mattress in a Box with Memory Foam & Individual Pocket Spring for Edge Support,Pressure Relief,Medium Firm,CertiPUR-USHybrid MattressesSailvan 12-Inch Queen Size Mattress in a Box, Hybrid Medium-Firm Support Mattress with Cooling Gel Memory Foam,Motion Isolation, CertiPUR-US Certification,and Pressure ReliefHybrid MattressesSailvan Queen Mattress 12 inch,Purple Queen Size Mattress in a Box,Cooling Gel Infused Memory Foam and Pocket Hybrid Spring Mattress,Medium Firm,Pressure Relief,CertiPUR-USMemory Foam MattressesYilicy 12 inch Queen Mattress in a Box, Spring Hybrid Memory Foam Medium Firm Mattress,AdultHybrid MattressesGREOO Queen Size Mattress in a Box 12" Hybrid Cooling Gel Memory Foam with Individually Pocket Coils Firm Pressure Relief CertiPUR-USHybrid MattressesWhite with Black Rim Mattress, 12 Inch Euro Top Mattress in a Box,Queen, Memory Foam Hybrid Mattress with individually Pocket Springs,MedHybrid MattressesCICIMLU 12 inch Queen Mattress ,Hybrid Mattresses Medium Firm in a Box
Mattress Comfort LevelMediumKOW Mattress California King Size 12 inch Memory Foam Hybrid Mattress in a Box, MediumMediumFull Mattress, 10 Inch Pocket Spring and Memory Foam Mattress in a Box, Pressure Relief, Full SizeMediumMocangtu 12" Queen Hybrid Mattress in a Box, Gel Memory Foam with Individually Wrapped Pocket Coils, Medium Firm, Pressure Relief, Cooling Sleep SupportMediumSEEUO Queen Mattress,12 inch Hybrid Mattress in a Box with Memory Foam & Individual Pocket Spring for Edge Support,Pressure Relief,Medium Firm,CertiPUR-USMediumSailvan 12-Inch Queen Size Mattress in a Box, Hybrid Medium-Firm Support Mattress with Cooling Gel Memory Foam,Motion Isolation, CertiPUR-US Certification,and Pressure ReliefMediumSailvan Queen Mattress 12 inch,Purple Queen Size Mattress in a Box,Cooling Gel Infused Memory Foam and Pocket Hybrid Spring Mattress,Medium Firm,Pressure Relief,CertiPUR-USMediumYilicy 12 inch Queen Mattress in a Box, Spring Hybrid Memory Foam Medium Firm Mattress,AdultFirmGREOO Queen Size Mattress in a Box 12" Hybrid Cooling Gel Memory Foam with Individually Pocket Coils Firm Pressure Relief CertiPUR-USMediumWhite with Black Rim Mattress, 12 Inch Euro Top Mattress in a Box,Queen, Memory Foam Hybrid Mattress with individually Pocket Springs,MedMediumCICIMLU 12 inch Queen Mattress ,Hybrid Mattresses Medium Firm in a Box
FeaturesMattress-in-a-BoxKOW Mattress California King Size 12 inch Memory Foam Hybrid Mattress in a Box, MediumMattress-in-a-BoxFull Mattress, 10 Inch Pocket Spring and Memory Foam Mattress in a Box, Pressure Relief, Full SizeMattress-in-a-BoxMocangtu 12" Queen Hybrid Mattress in a Box, Gel Memory Foam with Individually Wrapped Pocket Coils, Medium Firm, Pressure Relief, Cooling Sleep SupportMattress-in-a-BoxSEEUO Queen Mattress,12 inch Hybrid Mattress in a Box with Memory Foam & Individual Pocket Spring for Edge Support,Pressure Relief,Medium Firm,CertiPUR-USBreathable ConstructionSailvan 12-Inch Queen Size Mattress in a Box, Hybrid Medium-Firm Support Mattress with Cooling Gel Memory Foam,Motion Isolation, CertiPUR-US Certification,and Pressure ReliefMattress-in-a-BoxSailvan Queen Mattress 12 inch,Purple Queen Size Mattress in a Box,Cooling Gel Infused Memory Foam and Pocket Hybrid Spring Mattress,Medium Firm,Pressure Relief,CertiPUR-USMattress-in-a-BoxYilicy 12 inch Queen Mattress in a Box, Spring Hybrid Memory Foam Medium Firm Mattress,AdultMattress-in-a-BoxGREOO Queen Size Mattress in a Box 12" Hybrid Cooling Gel Memory Foam with Individually Pocket Coils Firm Pressure Relief CertiPUR-USMattress-in-a-BoxWhite with Black Rim Mattress, 12 Inch Euro Top Mattress in a Box,Queen, Memory Foam Hybrid Mattress with individually Pocket Springs,MedMattress-in-a-BoxCICIMLU 12 inch Queen Mattress ,Hybrid Mattresses Medium Firm in a Box
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Customer ratings & reviews

4.3 out of 5 stars
stars3,432 ratings864 reviews
How item rating is calculated

Reviews summary

Pros
  • : Offers great value at this cost.
  • : Provides comfort and eases body aches.
  • : Offers great support and comfort during rest.
  • : Made with comfortable and durable components.
  • : Mattress sinks 4-6 inches when laid upon.
Neutral
  • : Offers stability for some users, but can be inconsistent in edge support.
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Showing 1-3 of 864 reviews

Jul 10, 2025
850Mom
Item details
Bed size: Queen
Mattress thickness: 12 in
Mattress comfort level: Plush
Sold and shipped byKoala Furniture
5 out of 5 stars review

Verified Purchase

Perfect for a teen or guest bedroom

I purchased this for my teenage who had outgrown his twin. Shipping was fast and even better was the price. We chose the plush option for no extra cost but it still felt firm enough to provide back support and teenage rough housing. Mattress was ready in less than 24 hours with no unusual smell or issues. Would definitely recommend to friends or family.

Helpful?6W7EVHANJ6DC5192292993
Apr 7, 2025
matthew
Walmart Associate
Item details
Bed size: Queen
Mattress thickness: 12 in
Mattress comfort level: Plush
Sold and shipped byKoala Furniture
5 out of 5 stars review

Verified Purchase

good matress

honestly really like it. the matress arrived early in a box smaller then i thiugh it would fit in had no damage very comfortable ic you have no problem with being able to feel the springs every once in a while and is very loght and easy to move around

Helpful?6W7EVHANJ6DC5192292993
Jun 19, 2025
anonymous
Item details
Bed size: Full
Mattress thickness: 14 in
Mattress comfort level: Plush
Sold and shipped byKoala Furniture
5 out of 5 stars review

Verified Purchase

Worth it!

I was a little skeptical at first about ordering this product. When the package arrived I was like there is no way a full size mattress is in that box! After opening the package and setting up the bed I was absolutely amazed! The mattress was perfect. Comfortable and firm! I would definitely purchase this product again.

Helpful?6W7EVHANJ6DC5192292993

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