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
$50.00
/ mo
Learn more
- – 6-month term
- – 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
90-day returns
Learn more
90-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:
17 left in stock
Arrives
Wednesday, Dec 17
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: 7
Fill Material: Gel Memory Foam
Weight Limit: 800 Pounds
Special Feature: Breathable, Fire Retardant, Low Motion Transfer, 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: February 13, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Dec 17
Yes, absolutely! You may return this product for a full refund within 90 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
Size: Twin
Style: 12 Inch - Medium Plush
I love this mattress. I needed a new mattress. My old one was giving me horrible neck and back pain. I was worried bec my husband picked this out for me. It is like sleeping on a cloud. The mattress is such great quality. My neck and back improved immediately. There was no smell or anything wrong with the mattress. It came exactly as described. Supports my body and is the right amount of firmness. Would buy again
...
show more
Reviewed in the United States on October 25, 2025 by stephanie
Size: Full
Style: 12 Inch - Firm
I brought this mattress for my 4 year old daughter room she getting a big girl room . The mattress totally exceeded my expectations it’s got that perfect touch of soft top comfort with enough support underneath and good for my daughter to jump on. I also love that the setup was a breeze too came rolled up in a box which is pretty cool and puffed up into full mattress mode pretty quickly. Not going to lie the bed had a smell at first but air it out and in a day or two it should be good. Recommend a air purifier Overall, super happy with the purchase. If you’re mattress hunting on a budget and don’t want to spend alot of money at the store I definitely recommend this one.
...
show more
Reviewed in the United States on September 18, 2025 by Maya Maya
Love this mattress! I needed a firm one and this is it! So comfortable! I sleep on my side\tummy and it’s perfect.
Reviewed in the United States on November 5, 2025 by Shannon
Size: Queen
Style: 16 Inch - Firm
Decent mattress for the price. Firm but not as supportive on my hips and shoulders as I would like as a side sleeper. I have had it out of the plastic for over a week now and it is still not at the 16 inch height that was advertised. It also does not fit as snug in my queen size frame as my last mattress. Delivery was also frustrating as the bed arrived days late and I had chosen this unit specifically for its original quick delivery time. It was delivered in a damaged box with the plastic torn leaving my mattress open to the dirt elements before I could even fully unpackage it myself.
...
show more
Reviewed in the United States on November 1, 2025 by Thrishy Trish
Size: Full
Style: 12 Inch - Firm
Really comfortable .. firm when laying down. Soft when sitting dont know how or why but I sleep great 😌
Reviewed in the United States on October 31, 2025 by Tiffanie
Size: Twin
Style: 12 Inch - Medium Plush
Esta muy bueno lo recomiendo se descansa muy bien
Reviewed in the United States on October 31, 2025 by Samuel Cadenas
Size: Twin
Style: 12 Inch - Medium Firm
Buen producto
Reviewed in the United States on November 5, 2025 by Pilar Mendoza
Size: Full
Style: 12 Inch - Firm
This had really good reviews so I’m really disappointed on how hard the mattress is. Definitely does not feel like memory foam to me. Update: Now that I’ve actually slept on it, I can confidently say that it’s the worst sleep I’ve ever had! The mattress is so hard! And if you drift too far off to the edge or sleep on the side, the mattress slopes down.
...
show more
Reviewed in the United States on September 30, 2025 by Eli