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Onlylucky Firm California King Mattress 12 Inch, Gel Memory Foam Hybrid Mattress with Pocket Springs for Pressure Relief & Motion Isolation, Premier Comfort Night Sleep, Enhance Support Bed in a Box

  • Based on 69 reviews
Condition: New
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$349.48 Why this price?
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Availability: 20 left in stock
Fulfilled by Amazon

Arrives Wednesday, Jun 25
Order within 15 hours and 11 minutes
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Style: 12 Inch Firm


Size: California King


Features

  • California King Size Mattress: Premium Comfort and Support:Experience unparalleled comfort and support with our 12-inch california king size mattress, designed to provide a luxurious and restful sleep experience. As a california king mattress, it combines the best of both worlds with its hybrid construction of gel memory foam and individually wrapped pocket springs
  • Ergonomic Design for Healthier Sleep:Designed with ergonomics in mind, our OnlyLucky hybrid California king mattress includes 7 distinct sleep zones that conform to the natural contours of your body. These zones help distribute weight evenly, reducing pressure points and promoting healthy spinal alignment, ensuring a restful and pressure-free sleep
  • Advanced Support System: Our OnlyLucky California king size mattress features individually wrapped pocket coils that offer pinpoint support, ensuring that movements on one side of the mattress do not disturb the other side. This mattress design promotes undisturbed sleep even when your partner moves during the night, enhancing the overall quality of your rest
  • Enhanced Comfort and Safety: Crafted with premium gel memory foam and an extra-thick layer of foam, our California king mattress provides enhanced comfort and relaxation. The high-quality materials ensure a safe and luxurious sleeping experience, making it the perfect choice for anyone seeking a balance between support and softness
  • Innovative Materials for Optimal Sleep:Utilizing advanced nano foam technology, our California king bed mattress ensures optimal breathability and temperature regulation. The 3D breathable fabric cover enhances air circulation, keeping you cool and comfortable throughout the night. The skin-friendly material promotes a restful and rejuvenating sleep environment
  • Exceptional Customer Service: It comes conveniently packed in a box, making it easy to transport and set up.Please allow 24 to 72 hours for your mattress to fully regain its shape after unboxing. Plus, we offer exceptional customer service and a satisfaction Solution to ensure you have a seamless and satisfying experience from purchase to use

Size: California King


Special Feature: Orthopedic, Pressure Relief


Color: Grey


Brand: Onlylucky


Included Components: Mattress


Size: California King


Special Feature: Orthopedic, Pressure Relief


Color: Grey


Brand: Onlylucky


Included Components: Mattress


Weight Limit: 880 Pounds


Age Range (Description): Adult, ALL


Product Care Instructions: Spot Clean Only, Allow to Expand After Unboxing


Manufacturer: Onlylucky


Product Dimensions: 84 x 72 x 12 inches


Item Weight: 73.8 pounds


Item model number: 12 inch Cal King Mattress


Date First Available: May 1, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jun 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Comfortable yet affordable. Great for the spare bedroom.
Style: 12 Inch Size: Queen
Excellent comfort for a economical queen box mattress that we put in the spare bedroom. I look at it this way....if you put a super mattress in your spare bedroom then guests may overstay their welcome. In all honesty, this mattress is very comfortable and yes, we actually slept on it to see how good it was. ... show more
Reviewed in the United States on May 24, 2025 by schees1

  • Loved it.
Very happy with our new mattress! Filled out to its shape really fast and super comfortable! And very reasonably priced!
Reviewed in the United States on June 7, 2025 by KTurner

  • Worth the money
Style: 12 Inch Size: Queen
Very comfortable, nice firm mattress Expanded fully the same day when it was unpacked.
Reviewed in the United States on June 7, 2025 by Amazon Customer

  • Did not have a bad smell like some do when you first use
Style: 12 Inch Size: Queen
Comfy. And did not have a bad smell when unwrapped like some mattresses do.
Reviewed in the United States on June 6, 2025 by Anonymous

  • Not Extremely Comfortable
Style: 12 Inch Firm Size: King
Not very firm on the edges. I miss my memory foam hybrid mattress and wish we went with one of those, but this one was a lot let expensive. Overall 4 stars because it’s not super uncomfortable but it’s not my favorite. We had to upgrade from a queen to this king.
Reviewed in the United States on May 27, 2025 by Missing bars

  • Super comfy
Style: 12 Inch Size: Queen
Super comfortable after a month of use!! Love how much it fluffed up in 24 hours! Worth every penny
Reviewed in the United States on May 28, 2025 by Nikki Richmond

  • Happy customer
Style: 12 Inch Size: Full
Size and quality are spot on, no smell. Great mattress!
Reviewed in the United States on May 24, 2025 by Patricia

  • Should of bought sooner
Bed fluffed up in about 28hrs and was ready to go. I have severe back problems and this allows me to sleep Great. The king size is perfect and it's as easy as cut open and let it unfold. Great firmness with little to no stiffness.
Reviewed in the United States on April 23, 2025 by tony

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