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Onlylucky

Onlylucky Firm King Size Mattress, 12 Inch Gel Memory Foam King Mattress with Individual Pocket Spring for Pressure Relief & Motion Isolation, Premier Comfort Night Sleep, Bed in a Box, CertiPUR-US

    • Based on 38 reviews
Condition: New
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$297.97 Why this price?
Save $172.02 was $469.99

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Availability: 20 left in stock
Fulfilled by Amazon
Arrives Sunday, May 11
Order within 7 hours and 26 minutes
Available payment plans shown during checkout

Style: 12 Inch


Size: King


Features

  • King Size Mattress: Premium Comfort and Support:Experience unparalleled comfort and support with our 12-inch king size mattress, designed to provide a luxurious and restful sleep experience. As a 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 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 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 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 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: King


Product Dimensions: 80"L x 76"W x 12"Th


Top Style: Euro Top


Cover Material: Exquisitely Soft & Breathable Fabric


Number of Layers: 2


Fill Material: Gel Memory Foam


Weight Limit: 600 Pounds


Special Feature: Pressure Relief


Color: Grey


Product Dimensions: 80 x 76 x 12 inches


Item Weight: 67.9 pounds


Manufacturer: Onlylucky


Item model number: 12 Inch Mattress


Date First Available: March 1, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, May 11

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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  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Firm & Supportive
Style: 14 Inch Size: Queen
If you need a firm bed with a lot of support, this is the bed. I deal with a herniated disk in my lower back and previous back surgery so back support is key for me to have decent night sleep. My previous bed was WAY too soft and unsupportive and I needed to replace it quickly. For the price and convenience of next day delivery this bed saved the day (or Night lol). It doesn't look like a top of the line bed, but it does the job and looks like it will last. Disclaimer: I have only had the bed for 3 days, but so far so good. Hope to follow-up in 6 months with the same positivity. ... show more
Reviewed in the United States on April 1, 2025 by Mr. Love
    • 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
    • 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.
    • 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 Lexi Thrash
    • Could be a little more soft.
Review Image by Apexx Apexx
Review Image by Apexx Apexx
Review Image by Apexx Apexx
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 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
    • 14" CA King - Met My Hope For Box Mattress
Style: 14 Inch Size: California King
Review Image by Andrew Brost Andrew Brost
Review Image by Andrew Brost Andrew Brost
Review Image by Andrew Brost Andrew Brost
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
    • Soft, supportive, springy and excellent! A++++++
Review Image by KSnides KSnides
Review Image by KSnides KSnides
Review Image by KSnides KSnides
I'm so happy this mattress popped up here on Vine. I was sorely in need of a new mattress and this came up at the perfect time. I had an older Sealy and I've been waking up sore for a while now. Not anymore! After using the mattress for a week now, I can say it is excellent! It is far superior to even when my Sealy was brand new! I'm so happy. First, thank you to the Amazon driver for carrying it from the street to my side porch. It weighs 54 pounds and I know he struggled! The first thing you notice after opening it up, and letting it expand is just how thick it is and how beautiful it looks. It is definitely made with quality materials and the stitching is perfect throughout. They did not skimp on material or craftsmanship. Also, there is no foul smell whatsoever. So, I opened it and just let it lay on my bedroom floor for a few hours to make sure it fully expanded while I removed my old full size Sealy, took off the sheets and threw them in the laundry and then vacuumed under my bed frame. While the mattress was still on the floor, the next thing I did, of course, was to give it a quick tryout. I stood and then laid on it. It is strong, supportive and a little springy without being jarring. Perfect springiness! It's mildly firm. I laid on it and, no kidding, I nearly fell asleep after about 3 minutes on it. It felt like heaven. This mattress has 8 different layers including 2 types of springs, 2 types of gel pads and 2 types of support pads. Let me tell you that they all work! Together, in unison, to provide excellent support and a great feeling. I haven't woken up sore at all. And, the first layer, a breathable cooling fabric really seems to work. I usually run hot and either wake up in the night or I push the covers off of myself while sleeping. Well, I haven't done either of those the past week at all. It's springy enough, but not too much where it jars you when you move. You don't sink into it either and feel like you are disappearing. It's just a great mattress and I'm finally getting good sleep. I know many people are wary and leery of buying mattresses online. I don't think anyone will be disappointed with this one. I definitely give this an A++++++ and am just over the moon with it. ... show more
Reviewed in the United States on March 31, 2025 by KSnides KSnides

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