King Size Mattress, 12 Inch Gel Memory Foam, Cooling & Back Pain Relief, CertiPUR-US Certified, Fiberglass Free, Foam Made in USA, Medium
Condition: New
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Extended holiday returns
Returnable until Jan 31, 2026 Learn more
Returnable until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Dec 24 – Dec 26
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Size: King
Style: 12 Inch
Features
- Cooling & Comfortable Sleep Environment: Experience refreshing, clean sleep with the Dyonery gel-infused charcoal memory foam mattress that effectively regulates temperature and alleviates pressure points, helping to relieve back pain while keeping you cool and comfortable all night long.
- Perfect Medium Feel Support: Designed to contour to your bodys shape and weight, this medium mattress offers balanced comfort and support suitable for all sleeping positions, providing a cozy yet supportive rest without being too soft or too firm.
- Certified Safe & Non-Toxic Materials: Made in the USA with CertiPUR-US and Oeko-Tex Standard 100 certifications, ensuring that they are free from harmful substances and independently tested for safety.
- Quick & Easy Setup: Compatible with all bed frames including box springs, adjustable beds, floors, and hospital beds, simply unroll and allow 12 hours for full expansion to its original shape for immediate comfort.
- 10-Year Limited Warranty & Return Policy: Enjoy peace of mind with our 10-year limited warranty. PLEASE NOTE, non-quality related returns after opening are not accepted.
Brand: Dyonery
Size: King
Product Dimensions: 80"L x 76"W x 12"Th
Top Style: Tight Top
Cover Material: Jacquard
Number of Layers: 5.0
Fill Material: Gel Memory Foam
Special Feature: Bamboo-charcoal , Pressure Relief
Color: Black
Model Name: CH 12"K
Product Dimensions: 80 x 76 x 12 inches
Item Weight: 87 pounds
Department: Unisex Adult
Manufacturer: Dyonery
Item model number: DYO-MDV120K00CHT
Date First Available: July 5, 2023
Age Range Description: Adult
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Dec 24 – Dec 26
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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- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Size: Queen
Style: 12 Inch
This mattress is amazing! Super comfortable and supportive — not too soft, not too firm, just perfect. I could feel the difference from the very first night. It arrived quickly, was easy to set up, and expanded to full size in just a few hours. I love that it’s CertiPUR-US certified and fiberglass free, which gives me peace of mind. I’ve been sleeping so much better, and I highly recommend it to anyone looking for a quality mattress at a great price.
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Reviewed in the United States on October 16, 2025 by Mgumus
Size: Queen
Style: 10 Inch
Excellent Value! Cool, Comfy, and Perfect for a Budget I am absolutely thrilled with this Queen Mattress (10 Inch Charcoal Gel Memory Foam)! I was looking for a high-quality mattress that wouldn't break the bank, and this one has completely exceeded my expectations. From the moment I unboxed it (the setup was quick and easy), I could tell this was a fantastic purchase. Here are the highlights: • Cooling Comfort is Real: The Charcoal Gel Memory Foam truly works. I am a warm sleeper, and I’ve noticed a significant difference. I stay comfortable and cool throughout the entire night, which is a major win. • Perfect Medium Feel: The mattress is described as medium, and I found that to be accurate. It offers the perfect balance of soft comfort and supportive structure, cradling you without making you feel stuck. It’s incredibly comfy! • Worth Every Penny: For anyone shopping on a budget, this mattress is seriously well worth the price. The fact that it is CertiPUR-US Certified and Made in the USA of US Foam provides great peace of mind regarding quality and safety (plus, it's fiberglass free). If you need a great sleep upgrade without the premium price tag, do yourself a favor and get this mattress! Highly recommend!
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Reviewed in the United States on September 28, 2025 by Chance Ogrodny
Size: King
Style: 14 Inch
I’m really happy with this mattress! It arrived well-packed and expanded quickly after opening. The medium firmness is perfect — supportive but still soft enough to feel cozy. I’ve been sleeping much better, and my back feels great in the morning. The charcoal gel keeps it cool at night, and I love that it’s fiberglass-free and CertiPUR-US certified. The quality feels premium, and it looks great in my bedroom. Definitely recommend this mattress to anyone looking for comfort, support, and safety at a good price!
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Reviewed in the United States on October 23, 2025 by Ranagul
Size: King
Style: 14 Inch
I purchased the King 14” Charcoal Gel Memory Foam Mattress and it has truly been one of the best investments I’ve made. The design feels luxurious and looks fantastic in my bedroom. The firmness is perfectly balanced—not too soft and not too hard—providing just the right amount of support for my back. Since switching to this mattress, I sleep deeper, toss and turn less, and wake up without any back pain. The cooling feature really works, keeping me comfortable throughout the night without overheating. The king size offers plenty of space and feels incredibly spacious, which makes a big difference in comfort. The quality is excellent, it genuinely feels like a high-end mattress. Setup was simple, and the mattress expanded perfectly right out of the box. From the very first night, I noticed the difference: supportive, comfortable, and restful sleep. This mattress exceeded all my expectations, and I couldn’t be happier with my purchase.
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Reviewed in the United States on September 20, 2025 by Amazon Customer
Size: Queen
Style: 10 Inch
It’s a nice mattress not extremely heavy to carry and it was easy to set up. it is on the harder side but over all I think it’s comfortable and if you’re looking for something quick and cheaper I think it works perfectly fine. If ur not into such a hard mattress i’m sure it would work well w a mattress topper. It doesn’t sag the edges of the bed are sturdy I got the 10 inch and it is a little low but I like it. I’ve noticed I do get a little sweaty when I’m sitting on the bed but I also have a water proof mattress cover so that could be why.
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Reviewed in the United States on November 17, 2025 by Lyss
Size: Queen
Style: 12 Inch
This mattress is simply excellent! It's incredibly comfortable to sleep on—it's medium-firm, so you don't sink in, but it's not too hard either. Back pain goes away in the morning, and I feel well supported. I can sleep in any position. After unpacking, the mattress quickly took on its shape and had no odor. I liked that there's no fiberglass inside, and the foam is certified, meaning it's made from safe materials. I'm also pleased that the carbon foam really helps keep me cool and fresh while I sleep, especially in the summer. The cover is soft and pleasant to look at, and it looks well-made. It was carefully packaged. I'm very happy with the purchase and definitely recommend this mattress to anyone who values comfort and quality. I've been sleeping on it for several weeks now, and it hasn't sagged, nor has it retained its shape. I wake up every morning feeling well-rested and in a good mood—a great choice for my budget!
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Reviewed in the United States on October 21, 2025 by Volodymyr
Size: Full
Style: 10 Inch
I’ve been using this Dyonery memory foam mattress for over a month, and I’m really impressed. It arrived well-packed and expanded to full size within a few hours. The medium firmness feels just right — soft enough to be comfortable but firm enough to give great support. I no longer wake up with back pain!The charcoal memory foam keeps the mattress cool throughout the night, and I love that it’s fiberglass-free and CertiPUR-US certified, which gives me peace of mind about safety and quality. The cover material also feels soft and durable.Overall, an excellent value for the price.
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Reviewed in the United States on October 13, 2025 by Wesley
Size: Queen
Style: 12 Inch
This mattress is perfect — not too soft and not too firm either! It came in a box and was super easy to set up. The memory foam feels supportive and comfy, and I’ve been sleeping so much better since getting it. It’s also CertiPUR-US certified, which makes me feel good about the quality. Highly recommend for anyone looking for a great night’s sleep!
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Reviewed in the United States on November 3, 2025 by Gabriella Kerr