Onlylucky Firm King Mattress 14 Inch, Luxury Hybrid King Size Mattress in a Box, 7-Zones Individual Pocket Springs, Extra Hip/Shoulder/Lumbar Support, Fiberglass-Free, 365-Night Trial, CertiPUR-US
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30-day refund / replacement
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Availability:
In Stock.
Arrives
Sunday, Apr 19
Style: 14 Inch
Size: King
Features
- Pain Relief & Spine AlignmentOnlylucky firm king mattress features multi-layer memory foam and reinforced individual pocket springs for comfort and targeted support. The ergonomic 7-zone support system evenly distributes body weight, relieves pressure points and improves spinal alignment, offering softer cushioning at shoulders/hips while enhancing lumbar support to fully fit your body curves. Suitable for all sleeping positions, it helps reduce back pain for luxurious sleep.
- Stay Cool & Comfort SleepFeaturing a Euro Top design for enhanced comfort, Onlylucky king bed mattress combines breathability with advanced cooling technology for optimal temperature regulation. It uses skin-friendly and breathable fabric that is fiberglass-free, effectively boosts breathability by 30%. The gel memory foam helps you stay cool and dry all night. The individual pocket spring system and egg crate foam layer improve air circulation delivers a comfortable sleeping experience.
- Upgraded Enhanced Edge SupportOnlylucky king size mattress 14 inch is reinforced with 2.12.3mm perimeter coils and high-density support foam on the sides to prevent sagging. It effectively prevents body roll and expands sleep space, reduces the risk of edge roll during nighttime movement and improves convenience when sitting, lying down, and getting in or out of bed. The upgraded edge design also protects the internal structure and extends the lifespan of the mattress.
- Motion Isolation & Quiet SleepOnlylucky king memory foam mattress features hundreds of premium quiet individual pocket springs and slow rebound memory foam, effectively absorbing noise and vibration caused by turning over during sleep, minimizing motion transfer to your partner and allowing you to enjoy deep sleep without being disturbed, making it ideal for light sleepers.
- CertiPUR-US Safety & 365-Night TrialOnlylucky king mattress in a box comes vacuum-sealed for easy transportation. Designed to fit most standard bed frames, it features convenient side handles for easy mobility and position adjustment. Onlylucky hybrid mattress king is CertiPUR-US certified, and we offer a 365-night trial and 24-hour customer assistance. For optimal comfort, please allow 24 to 72 hours for the mattress to fully expand.
Brand: Onlylucky
Size: King
Product Dimensions: 80"L x 76"W x 14"Th
Item Firmness Description: Firm
Top Style: Euro Top
Cover Material: Polycotton
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 Firmness Description: Firm
Number of Layers: 8
Weight Capacity Maximum: 800 Pounds
Additional Features: Breathable, Fire Retardant, Low Motion Transfer, Pressure Relief, Temperature Regulating
Mattress Coil Type: Pocketed Coil
Construction Type: Hybrid
Number of Mattress Coils: 800
Size: King
Item Dimensions L x W x Thickness: 80"L x 76"W x 14"Th
Item Depth: 14 inches
Item Dimensions: 80 x 76 x 14 inches
top-style: Euro Top
Color: Grey
Style Name: 14 Inch
Brand Name: Onlylucky
Age Range Description: ALL
Model Name: King Size Mattress
Product Benefits: Back Pain Relief, Improves Sleep, Posture Support, Pressure Relief, Reduces Toss & Turn, Stress Relief
Model Number: King Mattress 14 inch
Manufacturer: Onlylucky
Cover Material: Polycotton
Fill Material: Gel Memory Foam, High Density Foam, Memory Foam
Mattress Comfort Layer Material: Gel Memory Foam, Memory foam
Material Type: Gel Foam, Individual Pocketed Springs, Memory Foam, Polycotton
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Apr 19
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
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Top Amazon Reviews
The setup process was a breeze. Was able to go from vacuum packed roll to inflated bed capable of being used in about 4 hours. The depth and support given was sensational, giving a better night's sleep compared to standard mattresses I've used before.
Reviewed in the United States on November 22, 2025 by Randy J. Boyd
Nice well made & comfortable 11.5in full size gel memory foam mattress. The mattress arrives in a box with air tight packaging, once you release the mattress it will take up to 24hrs to fully expand to its normal regular which is 75” L x 54” W x 11.5” thick. The mattress has a good look & design with dark/light grey colored borders & a white soft comfortable firm mattress Euro top that is a hybrid memory foam & gel foam material. The mattress is definitely comfortable to sleep on with a good nights rest & mattress thickness, the current price listed is a fair value for this full size & thickness.
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Reviewed in the United States on September 12, 2025 by J.J
This comes vacuum packed in a box which makes it alot easier to move than it used to be in the past, but it is heavy, one person can "walk" it but it really should have 2 people to carry it, and it's best to open it where you intend to place it. Just make sure you open it very carefully and have plenty of room for it to pop out. It starts to expand right away but you should allow a couple of days to judge the full expansion. We didn't really notice any smells. The weight limit says 550 pounds but I think it could hold more. This seems to be very well made and sewn. So far it's very comfortable, but it hasn't been that long yet, so I will try to update this review after using it for longer. I honestly can't say if this keeps you cool or retains heat, just haven't noticed one way or the other, but to me, not noticing is way better. We have this on a bed frame with slats that dont need a boxspring, and you cant tell any difference, or feel the slats or supports through the bed. The edges seem to be supported as of now, you don't feel like you will slide off when sitting on the edge, and it's comfortable while laying on it in any position, so, as of now, we are pleased with this mattress.
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Reviewed in the United States on March 29, 2025 by LS
Pretty nice mattress. Decompresses quickly and sleeps comfortably. Soft side is a bit of an issue, but not enough to be a deal breaker. Could be a little more plush and soft on top, but, overall, a good value and good quality for the money.
Reviewed in the United States on March 28, 2025 by Homer van Meter
I have been sleeping on full memory foam mattresses exclusively for what seems like a decade or more at this point. As my last mattress was getting a little canoe-y in the middle, I agreed to give this one a shot. I have to admit that I didn’t initially realize that it was a spring mattress hybrid…but now I’m sure happy it is. It turns out that sleeping on a memory foam brick really does feel like sleeping on quicksand if you’re a mobile sleeper like myself. The experience of being able to rollover without having to push myself up off the bed and/or run out of breath makes for a much more restful might of sleep overall. The support also just hits a bit different. I’m not sure if it is really better or worse but it is definitely different, and different is apparently what my body has been needing. The mattress arrived in the familiar mattress burrito, but this one sprung to life…pun intended. Unlike an all memory foam mattress which really does take a full day to reshape, this mattress was ready to sleep on the day it arrived. Overall – and so far – I really like this mattress. It’s good quality and super comfortable. If my opinion changes, I will come back and update this review.
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Reviewed in the United States on April 1, 2025 by SloMo
Our 4 year old was getting too big for his toddler bed, so we decided to move him to a full size bed. We wanted something that would last him for a while, so we wouldn't have to buy him another bed in a few years, as he's big for his age. I didn't want a 100% memory foam mattress as we have one for our guest room and while it's not uncomfortable, it's hard to move around on it and I also don't feel comfortable with something that soft for a preschool aged child. The hybrid design of this mattress is the perfect middle ground. My husband and I sleep on a 100% latex mattress and most other beds feel awful to us, but this one felt surprisingly comfortable when I tried it out myself. Very happy with this mattress, and when our 3 year old is ready to move out of his toddler bed, I think we'll be repurchasing.
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Reviewed in the United States on April 21, 2025 by Kelle B.
Comfy mattress in a box, and at a good price. Expands pretty fast, but I still let it sit for a few days before using, just to make sure it’s fully expanded. No smell. Got this for the guest bedroom, but of course I had to test it out before putting someone else in it, and it's really comfortable and supportive. I was prepared to get a topper if necessary, but it isn’t. Layered design for comfort, regardless of the way you sleep. Your body feels relived once lying down. The fabric is cool and breathable & for some strange reason, I like the “linen” material on the outside. 😊 Satisfied.
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Reviewed in the United States on May 1, 2025 by Shonda
This mattress is a hybrid-type with coils and foam on the top. It's attractively covered and nicer than I expected. I have been into selling beds for about year, and this one compares favorably to the name-brand mattresses at a lower cost of entry. I got the full-size for a kids bed replacement and for that purpose it's very nice. It's firm, but not too much so. The foam top is much thicker than another brand I recently also got. I'm happy with it.
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Reviewed in the United States on April 24, 2025 by TeaForecast