King Size Mattress, 12 Inch Deluxe Hybrid King Mattress in a Box, Cooling-Gel Memory Foam & Pocket Springs, Medium Firm, Pressure Relief, Extra Edge Support, 365-Night Trial (2026 Upgraded Support)
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Item Firmness Description: Medium Firm
Item Thickness: 12 Inches
Size: King (U.S. Standard)
Features
- Indulge In Deep, Luxurious Sleep Every Night - This luxurious hybrid mattress king features an advanced scientific structure ratio, which provides excellent alignment protection for your spine, fully relaxes your entire body muscles, eliminates pain, offers a soft and comfortable enveloping sensation and stable and long-lasting support. Coupled with the dual heat dissipation effect of condensation and ventilation, it is precisely the long-lasting comfortable mattress you have been expecting.
- Three Upgraded Support Systems - The king size mattress has enhanced the built-in three types of pocket springs, improving the overall durability and stable support of the mattress. It conforms to ergonomic principles to provide excellent alignment protection for the spine. The edges feature three rows of sturdy anti-sagging support, while the middle provides specific cushioning support for the waist and back. It is suitable for all sleeping postures and various groups of people.
- Superior Motion Isolation for Undisturbed Serenity - The medium firm king mattress is equipped with hundreds of individually pocket springs that work independently to deliver outstanding motion isolation, effectively absorbing vibrations and noise caused by a partner's movements. This makes it the ideal choice for shared bedrooms and light sleepers, allowing you to enjoy deep, undisturbed sleep.
- Luxury Euro Top & 5-Layer Comfort Design - The five-layer comfortable layer of the mattress king size works in harmony to achieve the best comfort balance. The breathable and skin-friendly Euro Top and cooling gel-infused foam enhance air circulation, effectively dissipate heat and sweat, and continuously keep the sleep cool. The mattresses are selected from high-quality and safe materials without fiberglass or harmful substances, providing a healthy guarantee for you and your family's sleep.
- King Mattress in a Box & Universal Compatibility - The king bed mattress is designed for easy transportation and setup, and is widely compatible with standard bed frame types (including platforms, adjustable, and slat bases). 2026 Upgraded 12-inch king size mattress is more sturdy and durable, with a maximum weight capacity of 1000 pounds. When opening the package, please maintain a safe distance to prevent the mattress from rapidly expanding and bouncing onto people.
- Expertly Crafted By Professionals - FANSACE is a professional R&D manufacturer with years of experience, dedicated to bringing you advanced sleep. Each mattress is rigorously inspected by authoritative quality control, featuring excellent quality. This luxurious hybrid king mattress has passed CertiPUR-US certification, complies with the US flame retardant standards, and offers a 365-night trial period, 10-year support, and accessible 24-hour customer assistance, ensuring your peace of mind during after-sales service. (For a perfect sleep experience, it is recommended to allow the mattress to expand for 24-72 hours.)
Brand: FANSACE
Size: King (U.S. Standard)
Product Dimensions: 80"L x 76"W x 12"Th
Item Weight: 68.7 Pounds
Item Firmness Description: Medium Firm
Top Style: Euro Top
Cover Material: Fabric
Number of Layers: 9.0
Fill Material: Gel Memory Foam, Memory Foam
Weight Limit: 1000 Pounds
Product Dimensions: 80 x 76 x 12 inches
Item Weight: 68.7 pounds
Manufacturer: FANSACE
Item model number: 12K03SAC
Date First Available: January 20, 2026
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
Item Firmness Description: Medium Firm
Item Thickness: 12 Inches
Size: Twin
It is fantastic my 9-year-old loves it. I had to beg her to let us put a sheet on it because it was so soft. It fits in the top of her bunk bed with enough room for her to wiggle around.
Reviewed in the United States on February 12, 2026 by Danielle Pearce
Item Firmness Description: Medium Firm
Item Thickness: 12 Inches
Size: Twin
Arrive on time. Look great Can't comment on how they sleep yet, but I can say sits perfect on bed and when I put them on frame sat on it sits very comfort
Reviewed in the United States on February 10, 2026 by laura
Item Firmness Description: Medium Firm
Item Thickness: 14 Inches
Size: California King
We loveyhe mattress. It's the right amount of soft and firm needed for my bad back.
Reviewed in the United States on February 11, 2026 by tweety
I got this twin mattress for my guest room and it feels well balanced right out of the box. After full expansion, it settled into a true medium-firm feel that offers good support without feeling stiff. The combination of gel memory foam and pocket springs does a nice job reducing motion, which is noticeable even with movement nearby. Edges feel reinforced and don’t collapse when sitting. Temperature stays comfortable through the night, and setup was easy on a standard frame. Overall, it’s a solid, comfortable mattress that works well for everyday sleep.
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Reviewed in the United States on January 26, 2026 by Sophia S.
The top layer feels smooth and comfortable, and underneath it has a more “built” feeling, like there’s real support doing the work instead of relying on pure softness. Sleep feels steadier, especially if you share the bed or just move around a lot. I don’t get that trampoline effect, and shifting positions doesn’t shake the whole mattress. It’s quieter too—no dramatic bounce, no weird wobble. The motion control makes a difference when you’re trying to stay asleep instead of waking up every time you roll over.
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Reviewed in the United States on January 21, 2026 by Jason
If there’s tossing and turning on one side, the other side stays steadier. That makes the whole setup feel more peaceful, especially during the middle of the night. The comfort on top is gentle and even. It’s not that super plush “hug” that makes it hard to switch positions, and it’s not a hard slab either. It lands in a middle zone that works for different sleep styles. I also like the edges—when I sit down to read or scroll on my phone, it doesn’t feel like the border is collapsing.
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Reviewed in the United States on January 22, 2026 by Badge
I like a mattress that doesn’t trap heat, and this one stays pretty even through the night. The foam has that slightly cushioned feel on top, but it doesn’t turn into a warm sinkhole. It feels balanced—enough softness to take the edge off pressure points, with a supportive “hold” underneath. What really stands out is how calm it feels when I move around. Instead of the whole surface reacting, it stays settled. I also noticed the edges feel reinforced, so I’m not sliding off the side when I sit down to tie shoes or hop up in the morning.
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Reviewed in the United States on January 19, 2026 by WREN
Item Firmness Description: Medium Firm
Item Thickness: 14 Inches
Size: Queen (U.S. Standard)
i opened the box 2 nights ago. I was expecting it to inflate fully in 48 to 72 hours. I did not expect that it would inflate fully once the plastic was removed. Impressive. I have slept on this for 2 nights now. And I have slept comfortably. I do not like that it has springs. 14 inch mattress has a 3 inch pillow top, very comfortable. Out of the 14 inch, the 3 inch pillow top is the foam, egg crate. I am anticipating the springs will puncture through the top. Yes, you can feel the springs and know that it's there. Therefore, I don't feel that this will last. Now, I could be wrong considering I have had this only 3 days and slept comfortably for 2 nights. In my opinion this is more like a box spring with an attached egg crate as the mattress topper.
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Reviewed in the United States on February 11, 2026 by myshell1975