12 inch King Size Mattress, Upgrade Edge & 7-Zoned Support Hybrid King Mattress in a Box, Breathable Premier Comfort Relief Sleep with Gel Memory Foam & Pocket Spring, Fiberglass Free, Medium
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Style: 12 Inch
Size: King
Features
- Premier Comfort 12 Inch King Size Mattress [NOT Include Bed Frame]: Cooling Hybrid Gel Memory Foam and Pocketed Springs: Innovative cooling gel-infused foam technology actively regulates body temperature. It effectively dissipates heat, preventing overheating and maintaining an optimal sleeping climate, allowing you to enjoy a cool and refreshing sleep
- Comfortable Breathable Medium King Size Mattress: Skin-friendly breathable 3D knitted frabic offers a cloud-like touch, ensuring a soft and cozy embrace throughout the night. It gently contours to your body, relieving pressure points and enhancing comfort, making every sleep a luxurious experience
- 12 Inch Mattress King Size In a Box: Comes in a compact box for easy transportation and home delivery. The installation process is simple - just open the box, unfold it, carefully slice through the vacuum packaging, and then stay away to wait for expansion, preferably give it 48-72 hours for full expansion, after which it will provide you with superior sleeping comfort
- Quiet and Low Motion Transfer Systems: Built with a noise-free structure, the mattress ensures undisturbed sleep. The pocketed springs system minimizes motion transfer, allowing you and your partner to move freely without disturbing each other, for a peaceful slumber
- Pressure Relief and Stable Construction: Precision-engineered support system is designed to maintain natural spinal alignment. It provides targeted support to different body zones, reducing back pain and promoting healthy posture, waking you up feeling rejuvenated
- Reliable Customer Support: Whether you have pre-purchase questions or post-purchase concerns, feel free to ask us a question with our 24/7 customer service support team
Brand: Ruoysun
Size: King
Product Dimensions: 80"L x 76"W x 12"Th
Item Firmness Description: Medium
Top Style: Euro Top
Cover Material: Cloud-Like 3D Knitted Frabic
Number of Layers: 2
Fill Material: Gel Memory Foam
Weight Limit: 600 Pounds
Special Feature: Low Motion Transfer, Pressure Relief
Product Dimensions: 80 x 76 x 12 inches
Item Weight: 92.8 pounds
Manufacturer: Ruoysun
Item model number: RA 12 Inch King Size Medium
Date First Available: November 27, 2025
Age Range Description: Adults Kids
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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Style: 14 Inch Medium
Size: King
Made my bed so much better. Super comfortable and the foam expanded to the full size of the bed.. I was worried at first. Overall I’m extremely pleased
Reviewed in the United States on January 5, 2026 by Amanda
Style: 14 Inch Medium
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We got it for Christmas to replace an 8 year old mattress. I have to say I’m pretty impressed with the quality and how easy it was. Got the 14 inch king, and were able to sleep on it same night. I think the best part is it got better and better for 2-3 days as it took full form. It’s not too soft, but not to firm either. A true hybrid and it’s great so far. We are sleeping better.
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Reviewed in the United States on January 1, 2026 by Jacob
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Very comfortable and affordable has eased my back pain greatly it took more than three days to fully inflate
Reviewed in the United States on December 20, 2025 by Felicia Monique Sanchez
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So far so good besides being Extremely heavy for me to move.. it’s very comfortable.
Reviewed in the United States on December 26, 2025 by Thomas H Goe
I truly love this mattress. I researched for months looking for the perfect mattress for my needs and found it. It's firm but, has the plush feeling I insisted on. After unpacking it, the mattress expanded quickly and easily. The first time I sat on it I noticed that I bounced a little. I'm very happy that it had no smell, like some mattresses are said to have. Firm comfort is essential to my back and neck issues. It's a perfect fit to my size full frame. I
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Reviewed in the United States on October 24, 2025 by Angel
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I love it. The only thing I don't like is when you sit on the side of the bed it's not as firm. The side of the bed should be more firmer.
Reviewed in the United States on January 11, 2026 by Paulette Saunders
Style: 14 Inch Medium
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I’m a real person giving this review, not a bot or anything. I received my 14” King size hybrid a few days ago. It expanded pretty quick after opening. No smell. This will be our second night sleeping on it. It weighs like a normal mattress would. Quality took a dip on Edge support, its not good, especially the middle part of the edge. Comfort wise I need more time to tell. It’s not real bad for the price but I don’t think it’s a long term solution for a mattress. I’ll update again after a little more time. I wanted this to be better than it is, and if it doesn’t get better after a few more nights, then I’ll be returning it. $400 is still $400. I won’t just waste my money.
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Reviewed in the United States on December 15, 2025 by Andrew S.
Very nice and comfortable
Reviewed in the United States on December 14, 2025 by Tammy