King Size Mattress, 12 Inch Hybrid Mattress in a Box, Memory Foam and Pocket Spring for Motion Isolation and Pressure Relief, Comfortable Medium Firm Edge Support
Condition: New
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30-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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 2 left in stock, order soon!
Arrives
Wednesday, Mar 11
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Size: 12Inch King (Medium Firm)
Features
- Comfortable Support The WinxMatrs 12 inch king size mattress mixed with hundreds of individually pocketed springs and multi-layer memory foam, provides targeted support according to body curves, ensures that your weight is evenly distributed from head to toe, so that you can have a good night's sleep and be refreshed the next day.
- Breathable and Healthy This memory foam 12-inch king mattress is made of high-density first-class material, which is comfortable breathable and nature, and can discharge the steam and sweat from the contact surface between you and the mattress, so that you can keep your body comfortable and dry during sleep. The mattresses independent pocket spring system prevents trapped heat for a cool and comfortable sleep.
- Motion Isolation This 10 inch king mattress consists of high-performance pocket springs and high-density foam, which can effectively absorb the noise and vibration generated by turning over during sleep, without disturbing your companions, sleep with peace of mind.
- In a Box and Fits All Bed Frames The king size mattress is compressed and packed in a box, allowing easy transportation to your room. Simply unbox and unroll the mattress with no intricate installation. Please allow 48-72 hours for full decompression and any potential odor to dissipate after opening the mattress. It is easy to set up and fits all kinds of bed frames, even on the floor. Whether you have a box spring, slatted frame, platform bed, or metal grid, this mattress is suitable and can be set up effortlessly.
- Satisfaction Assured WinxMatrs Mattress comes with 10-year support and offers a 365 night trial. We stand firmly behind the quality of our mattress to ensure your satisfaction. Keep a safe distance when unboxing, as the mattress may expand rapidly and pose a risk. For any assistance or issues, please contact our customer support team.
- Quality King Size Mattress Individually wrapped coils for bounce & support + plush memory foam for pressure relief. Perfect for cminimizes motion transfer. Responsive coils enhance support and isolate movement, perfect for couples and pet lovers. With reinforced edges, you can enjoy every inch of your mattress without the fear of rolling off.
Brand: WinxMatrs
Size: 12Inch King (Medium Firm)
Product Dimensions: 80"L x 76"W x 12"Th
Item Weight: 85 Pounds
Item Firmness Description: Medium Firm
Top Style: Euro Top
Cover Material: Polyester
Number of Layers: 3.0
Fill Material: Memory Foam
Weight Limit: 650 Pounds
Product Dimensions: 80 x 76 x 12 inches
Item Weight: 85 pounds
Manufacturer: WinxMatrs
Item model number: WinxMatrs001
Date First Available: December 10, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Mar 11
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 Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Size: 12Inch King (Medium Firm)
Medium firm mattress. Arrived quickly, and such a good value!
Reviewed in the United States on February 15, 2026 by Kellyn Morris
Size: 12 Inch Queen Black
Comfy, great price, good quality.
Reviewed in the United States on January 18, 2026 by Kaylee Parker
Size: 14Inch Queen (Medium Plush)
I researched and looked at several mattresses both traditional mattresses, and other “bed-in-boxes” mattresses before ordering this one. I ordered the 14-inch black mattress and I LOVE IT! So comfortable with the perfect balance of soft & firm. It feels “plushy” while also giving me “firm support” in all the right places. My only regret is that I didn’t order this sooner! Love it❤️
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Reviewed in the United States on February 10, 2026 by Closetrebel
Size: 12 Inch Queen Black
Very good quality and comfortable and shout-out to the delivery driver because it was very heavy
Reviewed in the United States on February 14, 2026 by Tyler Dixon
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Easy to use
Reviewed in the United States on January 17, 2026 by stephen kenyon sr
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Very comfortable
Reviewed in the United States on February 14, 2026 by OHIO
Size: 12 Inch Queen Black
Very comfortable mattress for the price I would definitely buy again
Reviewed in the United States on February 4, 2026 by Antione Habersham
The most comfortable mattress I’ve ever owned…
Reviewed in the United States on February 4, 2026 by karl m pulaski