King Mattress,12 Inch King Size Mattress in a Box,Gel Memory Foam and Innerspring Hybrid Mattresses with Individual Pocket Spring for Motion Isolation,Pressure Relief,Medium Firm Feel
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Size: King
Style: 12 Inch Black
Features
- {{Cool Sleep on A Breathable Mattress}}- Compared with mattresses made of single material, LMANKBK hybrid mattresses are generally cooler and more comfortable. The skin-friendly fabric and the perforated memory foam promote heat dissipation, the individually wrapped coil structure underneath enhances the air flow inside the mattress, keeping you cool and comfortable for the whole night.
- {{Better Support and Back Pain Relief}}- This medium firm mattress contains multiple support layers that allow the mattress to fit exactly every part of your body. As the pressure on the shoulder, back, spine, and buttocks can be evenly distributed, the pressure point where the body contacts the mattress can be relieved, helping to eliminate your physical fatigue and pain.
- {{Isolated Motion}}- LMANKBK pocket spring mattress is supported by hundreds of reinforced pocket coils, each working independently to be noiseless and reduce the vibration of bed motion. Therefore, your deep sleep will never be disturbed by your partners turning over or getting up. King Mattress Measures 76" W x 80" L x 12" H and supports a maximum weight of 700 lbs.
- {{King Size Bed in a Box}}- The mattress is compressed and rolled into a box, which can be easily transported to the door for installation. Remember to keep enough distance from the mattress when unwrapping, because it may cause injury to bystanders when expanding. Please be patient and wait for 48-72 hours for it to fully expand. It is suitable for a variety of frames, such as box springs, slatted bases, flat platforms, adjustable beds, and even floors.
- {{Quality Guarantee}}- LMANKBK mattresses are covered by a 10-year warranty and 30-day refund policy. If you have any questions, please feel free to contact LMANKBK customer support team at any time.
Brand: LMANKBK
Size: King
Product Dimensions: 76"L x 80"W x 12"Th
Item Firmness Description: Medium Firm
Top Style: Tight Top
Cover Material: Polyester
Number of Layers: 3
Fill Material: Gel Memory Foam
Weight Limit: 700 Pounds
Special Feature: Breathable, Low Motion Transfer, Pressure Relief
Product Dimensions: 76 x 80 x 12 inches
Item Weight: 53.9 pounds
Manufacturer: LMANKBK
Item model number: WKC-SM-12K-B
Date First Available: June 16, 2025
Age Range Description: ALL
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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Top Amazon Reviews
Size: Full
Style: 12 Inch Gray
This was an excellent purchase. I bought this for my daughter's room as we updated her to a more age appropriate bedroom (last updated when she was 4, she'll be 11 in a month) At this price point, I was leary. But it has exceeded my expectations! We let it rise for apx 3 days. I would occasionally lift around the edge of the mattress to ensure it puffed up equally and unified. It ended up being exactly 12" as described. And the best part is, while it has great semi-firm support, it's so very comfortable. The memory foam is absolutely doing its job. It's the perfect blend of soft and firm. She says she's slept better than ever. Zero issues with any smell. The weight is just right for one person to be able to maneuver (full size) I highly recommend this mattress and will definitely buy from this seller again in the future.
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Reviewed in the United States on December 27, 2025 by Kina Rose Kina Rose
Size: Queen
Style: 12 Inch
It’s firm and very comfortable, great quality for the price!
Reviewed in the United States on February 12, 2026 by Tauri
Size: Medium King
Style: 14 Inch
This bed was worth every penny, hold its shape for weight over 300 lbs no sinking what so ever and so comfortable for medium firm.. best hands down compared to furniture stores or discount stores.
Reviewed in the United States on February 13, 2026 by smart buyer
Very nice mattress but a little too firm for me
Reviewed in the United States on January 18, 2026 by Shannon
Size: King
Style: 12 Inch Black
Incredible! Well packaged, resized extremely fast. So frikken comfortable. I’m obsessed
Reviewed in the United States on March 1, 2026 by Jessica Faria
Size: Queen
Style: 12 Inch
Very good quality, super soft, comfortable and spacious. I just want to get home from work and relax on my soft mattress.
Reviewed in the United States on December 31, 2025 by Danay Alvarez Basabe
Size: Queen
Style: 12 Inch
It’s a POS mattress. First thing, there’s a bunch of springs going down the middle of the bed that makes it impossible to lay in the center of the bed because it’s like the great wall of china separating you from your partner. You can see it a ton when you lift the mattress up and lean it on the wall. Second, the bed is just uncomfortable as hell. You feel every uneven lumpy spring. You can feel the “edge support” because between that and the middle springs, it pins you in one, unpleasant spot. When you go to stand up though, the whole edge will sink in and be insanely unpleasant for whatever animal happens to be near that edge. Legit only good thing about the bed is that it is odorless. I have no idea how the return process is going to go, but the consensus in other reviews is that it is garbage and no one responds. The box ain’t a magic hat, it’s not going to fit the bed back in it without some factory sealing. Either way, I’m not going to be stuck paying to clean the garbage out your warehouse.
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Reviewed in the United States on January 13, 2026 by D
Size: Full Size
Style: 10 Inch
They are comfortable and price worthy
Reviewed in the United States on February 2, 2026 by Amazon Customer