Onlylucky King Size Mattress, 12 Inch Hybrid Medium Firm King Mattress in a Box with Gel Memory Foam & Pocket Springs for Back & Lumbar Support, Back Pain Relief, Motion Isolation, CertiPUR-US
Condition: New
Buy Now, Pay Later
As low as
/ mo
Learn more
- – Up to 36-month term if approved
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
100-day returns
Learn more
100-day refund / replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 5 left in stock, order soon!
Arrives
Monday, Oct 27
Recently Viewed
Size: King
Style: 12 Inch - Medium Firm
Features
- 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: 850 Pounds
Special Feature: Breathable, Fire Retardant, Pressure Relief
Color: Grey
Product Dimensions: 80 x 76 x 12 inches
Item Weight: 101.8 pounds
Manufacturer: Onlylucky
Item model number: 12 Inch king mattress
Date First Available: July 8, 2025
Age Range Description: Adult, ALL
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Oct 27
Yes, absolutely! You may return this product for a full refund within 100 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Color: Grey
Size: King
Style: 12 Inch - Firm
Great mattress! Very comfortable. Unrolls and forms quickly. Great value for the money! I was impressed. The smell is a little strong at first (like a chemical smell) but fades quickly! Highly recommend.
Reviewed in the United States on June 21, 2025 by Kilablake
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
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
Excelente calidad
Reviewed in the United States on July 3, 2025 by Dan
Color: Grey
Size: King
Style: 12 Inch - Firm
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
The first night I slept like a baby
Reviewed in the United States on April 29, 2025 by nyguanda tucker
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
This is my 3rd version of compressed mattresses in a bag, so to speak, 3 different sizes. I started with a California King, then Queen, and now a Full-sized. Honestly, I've enjoyed each one over the very high priced mattresses offered at furniture stores. One thing to note is that the softer the mattresses are from the beginning, the faster they break down, leaving you to replace them much quicker. I prefer ones like this brand, that have more support from the onset. They simply last years longer! Also, all mattresses have a 'break in period' of at least 90-days to fully know if they'll work for you. This is where many people make mistakes. I recommend using some type of a topper, if needed, during this period. I've personally found this very helpful to allow me time to assess the mattress. This full-size mattress is for a guest room, so it had ample time to fully expand before it was tried out. I found it very supportive, yet soft at the same time. However, I must say that the box it came in was quite heavy to maneuver by myself when it was delivered. But once two of us unboxed it and set it onto the frame BEFORE we opened the outer packaging, and it all went well. FYI - Please be careful opening the outer packaging so you don't puncture the mattress. It is also worthy to note that the mattress comes with two handle to easily move it, where my others did not. So far, I am impressed with the entire design of this mattress. This company has certainly done their homework, which I greatly appreciate. I feel certain that this mattress will last for many years. And honestly, even if it doesn't, for the price and convenience compared to furniture store mattress prices, I could buy a new one every couple of years. The only downside is that even though they offer FREE-RETURNS, it may not be so easy to do once the mattress is fully expanded. However, I've yet to have to return one. So that's the good news!
...
show more
Reviewed in the United States on April 21, 2025 by CJ66