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Onlylucky California King Mattress - 12 Inch Gel Memory Foam Cal King Bed for Pressure Relief & Motion Isolation, Premier Comfort Night Sleep, Hybrid Mattress in a Box, CertiPUR-US, Medium

  • Based on 61 reviews
Condition: New
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$359.99 Why this price?
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon

Arrives Saturday, Jun 28
Order within 6 hours and 46 minutes
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Style: 12 Inch


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

Brand: Onlylucky


Size: California King


Product Dimensions: 84"L x 72"W x 12"Th


Top Style: Euro Top


Cover Material: Exquisitely Soft & Breathable Fabric


Fill Material: Gel Memory Foam


Weight Limit: 800 Pounds


Special Feature: Pressure Relief


Color: Grey


Coil Type: Pocketed Coil


Product Dimensions: 84 x 72 x 12 inches


Item Weight: 100.8 pounds


Manufacturer: Onlylucky


Date First Available: March 20, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 28

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


  • Definitely as advertised!
Style: 12 Inch Size: California King
We are 1 month into our new mattress. It's pretty great. We needed firm and although ita cozy and soft on top, overall it provides good support. Our bed frame has high sides so it fits snug in there. But we are happy with overall quality!
Reviewed in the United States on May 5, 2025 by Trisha Jackson

  • What I needed
Style: 12 Inch Size: King
After extensive research and consideration, I decided to purchase the Only Lucky King Firm Mattress, and it has exceeded all my expectations. This mattress strikes the perfect balance between firm support and comfortable cushioning, making it an excellent choice for anyone seeking quality sleep without breaking the bank. ... show more
Reviewed in the United States on April 17, 2025 by Alex Thrash

  • Good Quality and Comfort
Style: 12 Inch Size: Queen
Description of mattress is as stated. Firmness is perfect.
Reviewed in the United States on May 2, 2025 by Vivek Persaud

  • Great deal!
Style: 12 Inch Size: King
The media could not be loaded. For the price, I'm really happy with this bed. It came wrapped and rolled in a plastic sheet. It expanded nearly instantly on unwrapping and I didn't notice any chemical smells or anything of that nature Pros: Cost was low, less than 3 big ones for a king size Can't feel the springs King size is so spacious! The cover is soft, and pretty cool to the touch. Supports well. Cons: This is a budget bed, and the durability is a little low. Mine arrived with a tear in the corner. It's cosmetic, so I'm not too bothered and it'll be covered with a sheet, but I was surprised to see how thin the material is on the sides of the bed. It appears to be non-woven fabric. The bed also sinks down pretty bad on the corners / unsupported sides. So far not a big problem, but noticeable enough. I also bought a 6 inch foam topper for the bed to add a little more poof, since the bed itself has a relatively thin layer of memory foam. Overall, I'm pretty happy with this bed for the price I paid. It was the lowest cost option for the size, a brand new decent king size mattress at this cost is pretty hard to find. We just moved and struggled to get something delivered, this is infinitely better than the floor at a small price point. Hope this was helpful for you! ... show more
Reviewed in the United States on March 28, 2025 by Casey

  • Should of bought sooner
Style: 14 Inch Size: King
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

  • Could be a little more soft.
Got this bed to replace a older mattress that my daughter was using. This mattress came in a large box and was vacuum sealed and rolled up like a taco lol. Once opened the mattress grew big and started to form and layout as it should. The mattress has handles on the side which made it easy to move. The mattress isnt too heavy either which is nice. The fabric is soft and the mattress is somewhat comfy, you can feel the coil springs when you lay down on it. The mattress however seems very well made and is soft. ... show more
Reviewed in the United States on April 9, 2025 by Apexx Apexx

  • Great Mattress
Style: 12 Inch Size: King
I am very pleased with this mattress, just the right amount of firmness but soft enough to be comfortable. I would have never thought a king size mattress would fit in a box but it did and we love it!!
Reviewed in the United States on April 22, 2025 by Bill C.

  • 14" CA King - Met My Hope For Box Mattress
The media could not be loaded. This 14" California King mattress is a good value for the money. It was full height within an hour. It sleep well, all positions. It was noted "firm", and I firm, what I wanted. The edges are not too soft, settle approximately less then 6" for my 200lbs. sit on edge, totally acceptable feel, no disappointment. I am relieved the sleep and corners are not soft. No out-gassing smells noticed. The quilt top is nice, however the stitching pattern (depressions) are noticeable, yet not a problem for me at all. This is nice mattress! ... show more
Reviewed in the United States on April 13, 2025 by Andrew Brost Andrew Brost

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