12 Inch King Hybrid Mattress in a Box – Medium Firm Support with Cooling Gel Memory Foam & Pocket Coils – Enhanced Pressure Relief, Motion Isolation & Breathable Comfort
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90-day refund / replacement
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.
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Availability:
In Stock.
Arrives
Thursday, Mar 19
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Size: 12 inch King
Features
- Balanced Hybrid Comfort for Everyday Sleep Designed to deliver a balanced feel, this hybrid mattress combines contouring comfort with stable support to help maintain proper spinal alignment for a more restful nights sleep.
- Cooling Gel Memory Foam Pressure Relief Cooling gel memory foam gently conforms to your body, relieving pressure points while preventing excessive sink for comfortable, supportive sleep.
- Zoned Pocket Coils for Targeted Support Individually wrapped, zoned pocket coils provide focused support for the back and hips, enhancing overall stability while adapting to your bodys natural curves.
- Cool & Breathable Tencel Knit Cover The premium Tencel knit cover feels silky-soft against the skin while wicking away moisture and promoting airflow, helping keep you cool and dry all nightideal for hot sleepers.
- Motion Isolation, Certified Materials & Easy Setup Motion-isolating coils reduce disturbances from partners or pets. Made with CertiPUR-US certified foams, this mattress is delivered compressed in a box for fast, easy setup and backed by a 10-year warranty.
Brand: Mambrc
Size: 12 inch King
Product Dimensions: 80"L x 76"W x 12"Th
Item Weight: 72 Pounds
Item Firmness Description: Medium Firm
Top Style: Euro Top
Number of Layers: 2
Fill Material: Gel Memory Foam
Color: Emerald Dusk
Coil Type: Pocketed Coil
Product Dimensions: 80 x 76 x 12 inches
Item Weight: 72 pounds
Manufacturer: Mambrc
Item model number: MAM-12K
Date First Available: September 2, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Mar 19
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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Learn more about financing & leasing here.
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Top Amazon Reviews
Size: 12 inch Queen
I am extremely happy with this queen-size mattress! It provides the perfect balance of comfort and support, making it easy to get a restful night’s sleep. The mattress feels high-quality, holds its shape well, and doesn’t sink or feel too firm. I wake up without back or body pain, which is a huge improvement for me. It was easy to set up and expanded perfectly. Overall, this mattress exceeded my expectations, and I would highly recommend it to anyone looking for comfort, durability, and great value.
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Reviewed in the United States on January 12, 2026 by Ali Ali
Size: 12 inch Queen
From the first night, I noticed a huge difference in my sleep quality. The medium firmness gives amazing support while still feeling soft and cozy. It stays cool all night and I wake up without feeling overheated or stiff. The motion isolation is impressive, making it perfect for sharing the bed. This mattress truly feels premium and has exceeded all my expectations.
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Reviewed in the United States on January 28, 2026 by Eyerlyn Eyerlyn
Size: 12 inch Queen
I’ve been sleeping on the Mambrc 12 Inch Queen Hybrid Mattress for a bit now, and it’s honestly been a great upgrade. It has a nice balance of softness and support, so my back feels better when I wake up and I don’t sink in too much. The mattress also stays cool throughout the night, which I really appreciate. Overall, it feels well-made, comfortable, and definitely worth the purchase.
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Reviewed in the United States on January 13, 2026 by Javarieostephenson Javarieostephenson
I was a little nervous about ordering a mattress online, but I’m really glad I took the chance. This queen mattress showed up tightly rolled in a box and was surprisingly easy to set up I just opened it, let it expand for about a day, and it was ready to go. There was only a slight new mattress smell at first, but it went away quickly. From the first night, I could tell the difference. It has a great balance between softness and support — not too firm, but not squishy either. The top layer feels really comfortable, and it molds just enough to your body without sinking too much. I used to wake up with a stiff back on my old mattress, but that hasn’t happened once since switching to this one. I’m a combination sleeper (mostly on my side and sometimes on my back), and this mattress works perfectly for both positions. My partner moves around a lot in their sleep, and I barely feel it, so the motion isolation is really good too. Another big plus is that it stays pretty cool at night It’s only been a few weeks, but so far, I’m super impressed. For the price, the quality feels way better than I expected. It feels sturdy, supportive, and really comfortable — like something you’d pay much more for in a store. I
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Reviewed in the United States on November 8, 2025 by Yeraldin angel Yeraldin angel
Size: 12 inch King
The mattress quality is excellent and very comfortable. However, I ordered a 12-inch mattress and received a 10-inch instead. That was disappointing. The product itself is great, but the size was incorrect, so I will be returning it.
Reviewed in the United States on February 13, 2026 by Amazon Customer
Size: 14 inch Queen
Seriously, one of the most comfortable beds I have ever had and honestly worth the extra fifty dollars for the extra two inches. It was just firm enough, it had no smell , it was the perfect fit and it was pretty cooling, and does not hold heat. My back is not as sore lately as well so im still excited about this bed!
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Reviewed in the United States on February 19, 2026 by Elli
Size: 12 inch Queen
It expanded to its full shape surprisingly fast. It has a firm feel with a pleasantly puffy, cushioned top thanks to the cooling gel memory foam. The pocketed coils add great support and motion isolation, keeping the mattress cool, stable, and comfortable throughout the night.
Reviewed in the United States on January 18, 2026 by Barbara Melian Barbara Melian
Size: 12 inch Queen
Honestly, I love it. It’s super comfortable and has just the right amount of firmness. It doesn't get hot at all and feels like great quality for the price. I’ve slept amazing since the very first night. Highly recommend!
Reviewed in the United States on December 31, 2025 by / Daneyra Marie Ortiz Gerena