Onlylucky Firm King Mattress, 14 Inch King Size Mattress in a Box, Hybrid Mattresses with Gel Memory Foam & Quiet Pocket Springs for Pressure Relief, Motion Isolation, Fit for All Bed Frame
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Availability:
Unavailable
Color: White
Size: King
Style: 14 Inch - Firm
Features
- 7-Zone Support & Pressure ReliefOnlylucky king size mattress combines hundreds of individually wrapped pocket springs with contouring foam that conforms to your body curves, featuring 7 zones of targeted support. Our firm king mattress balances comfort and stability, effectively relieving pressure points to reduce back pain.
- Cooling & BreathableOnlylucky king size memory foam mattress combines breathable design with advanced cooling technology for optimal temperature regulation. Its skin-friendly knit fabric boosts breathability by 30%, while high density support gel-infused memory foam efficiently dissipates heat to keep you cool and comfortable all night.
- Motion Isolation & Edge SupportOnlylucky mattress king size features silent pocket springs working independently to minimize vibrations, effectively absorb movement and reduce motion transfer, ensuring undisturbed sleep even if your partner tosses and turns. The reinforced edge support provides enhanced stability, prevents sagging, and eases sitting, lying, or getting in and out of bed with extra comfort.
- Safety AssuranceOnlylucky king mattress is CertiPUR-US certified, ensuring eco-friendly materials and a comfortable sleep on an odorless mattress. It's 100% fiberglass-free, making it ideal for all sleepers, including pregnant people and babies. Enjoy a 365-night trial to test comfort, backed by lifetime service for long-term peace of mind.
- King Mattress in a BoxOnlylucky 14 inch king size mattress comes in a vacuum-sealed box for easy transportation. For optimal comfort, please allow at least 24-72 hours for the mattresses to fully expand. It fits most bed frames and works seamlessly in vans, dormitories, guest rooms, hotels, and kids' rooms. The king bed mattress is equipped with side handles for easy movement, making it simple to reposition when needed.
Brand: Onlylucky
Size: King
Product Dimensions: 80"L x 76"W x 14"Th
Item Firmness Description: Firm
Top Style: Euro Top
Cover Material: Polyester Blend
Number of Layers: 8
Fill Material: Gel Memory Foam, High Density Foam, Memory Foam
Weight Limit: 800 Pounds
Special Feature: Breathable, Fire Retardant, Low Motion Transfer, Pressure Relief, Temperature Regulating
Item Weight: 91.8 pounds
Product Dimensions: 80 x 76 x 14 inches
Item model number: 14 Inch King Mattress
Age Range Description: Adult
Date First Available: October 20, 2025
Frequently asked questions
This product is currently out of stock. Please check back later for shipping info.
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.
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Similar Products
Top Amazon Reviews
Color: White
Size: King
Style: 14 Inch - Firm
We are very happy with the mattress. We added a box spring 14ichs and it sits high with a welcoming look for a guest bedroom. Also it is firm not to hard but just right. You can't go wrong with the value price of this mattress.
Reviewed in the United States on February 4, 2026 by Prestige Quality
Color: White
Size: King
Style: 14 Inch - Firm
Great
Reviewed in the United States on January 25, 2026 by Nancy L
Color: White
Size: Queen
Style: 14 Inch - Firm
Very good
Reviewed in the United States on January 18, 2026 by Nelson
Color: White
Size: King
Style: 14 Inch - Firm
Love it nice and comfortable holds up well to the firmness
Reviewed in the United States on January 6, 2026 by Amazon Customer
Color: White
Size: Queen
Style: 14 Inch - Firm
Great mattress. I got firm. I was a little concerned it would be too hard but it's just right. Came in box, rolled up in vacuum sealed plastic. Take it out very carefully. Rolled it out on the bed frame, waited 2 days and it's all good. Definitely worth the black Friday price.
Reviewed in the United States on December 3, 2025 by BOSTON
Color: White
Size: Queen
Style: 14 Inch - Firm
Great, not too hard, not too soft just right for this side sleeper with hip bursitis
Reviewed in the United States on December 15, 2025 by N.A.C.
Color: White
Size: Queen
Style: 14 Inch - Firm
Awesome
Reviewed in the United States on December 13, 2025 by Cheryll V
I got this twin mattress for my kid’s room, and setting it up was much easier than I expected. It came in a compact box, and once I opened the plastic, it started expanding right away. I left it on the bed frame for a few hours, and it reached its full shape by the end of the day. The gel memory foam feels soft but still supportive. The first night my kid slept on it, they stayed asleep the whole night, which honestly doesn’t happen often. The next morning, they told me the bed felt “super comfy,” and I could tell they actually slept well because they woke up in a good mood. The surface feels cool to the touch, and that’s a big plus since the room tends to get warm at night. I tried lying on it myself just to check, and it felt surprisingly comfortable for an adult too. It has a nice balance between sinking in and staying supported, especially around the shoulders and lower back. Another thing I’ve noticed is that it doesn’t make noise when my kid moves around. Their old mattress creaked a lot, so the quietness is a nice change. The cover is soft and smooth, and it looks easy to spot clean if needed. After a few weeks of use, the mattress still looks the same and hasn’t sagged at all. My kid falls asleep faster now, and bedtime has been a lot easier. I’m really happy with how it turned out and how comfortable it feels.
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Reviewed in the United States on December 8, 2025 by Samson