UMN King Size Mattress, 12 Inch King Mattress in a Box, Individually Pocketed Springs, Pressure Relief, Motion Isolation, Provides Support, CertiPUR-US Certified, Medium Firm
Condition: New
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100-day returns
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100-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
Oct 15 – Oct 16
Style: King
Size: 12Inch
Features
- Perfect Balance of Comfort and Support: Our UMN mattress king size is designed with a unique memory foam hybrid mattress construction that combines plush comfort with sturdy support. Featuring individually pocketed springs, this mattress king adapts to your bodys contours, providing targeted pressure relief for a restful nights sleep.
- Advanced Motion Isolation Technology: Enjoy uninterrupted sleep with our king size bed mattress. The individually wrapped coils work independently, significantly reducing motion transfer. Whether you share your bed with a partner or a pet, you can move freely without disturbing anyone, making it an ideal choice for a peaceful night.
- Breathable and Safe Materials: This firm king mattress is crafted with breathable fabrics and CertiPUR-US certified foam, ensuring a healthy sleep environment. Our materials are free of fiberglass, providing a safe and comfortable sleeping surface for you and your family.
- King mattress in a box: Experience hassle-free setup with our king mattress 12 inch, which comes conveniently compressed and rolled in a box. Carefully unbox and unfold the mattressit may expand quickly upon opening, so please maintain a distance. Allow your double mattress to expand to its full size within 48-72 hours.
- Versatile and Durable for All Sleepers: Whether youre looking for a king hybrid mattress for your main bedroom or a smaller twin option for your childs room, our medium firm design offers balanced support for all sleeping positions. If you have any issues or concerns, please feel free to contact us, our customer support team is always here to assist you!
Brand: UMN
Size: 12Inch
Product Dimensions: 80"L x 76"W x 12"Th
Top Style: Breathable and Supportive Top
Cover Material: Cotton
Fill Material: Supportive Foam and Individually Pocket Springs
Special Feature: Motion-Isolation,Strong edge support, Pain Relief, Fiberglass Free
Color: White Grey
Coil Type: Pocketed Coil
Model Name: UMN-12K
Product Dimensions: 80 x 76 x 12 inches
Item Weight: 84.3 pounds
Manufacturer: UMN
Item model number: UMN-12K
Date First Available: December 18, 2024
Age Range Description: Adult,Baby,Kid
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Oct 15 – Oct 16
Yes, absolutely! You may return this product for a full refund within 100 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.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Style: Full
Size: 12Inch
This bed was easy to assemble is comfortable, soft yet firm, is a great quality and enhances the sleep quality of the guess who use it. The size is the best part it is perfect in size and a true full size mattress
Reviewed in the United States on July 19, 2025 by Dr. Shameka frith Dr. Shameka frith
Style: Full
Size: 12Inch
I had been waiting for my item to be delivered (which it was delayed by one day), I was excited about trying it out. Well, it did not disappoint! It was fun bringing it in and setting it up (which was easy). Once I let it finish unfolding and doing it's thing of opening up and I was surprised. No odor, very soft and ready to sleep in! This mattress is the most comfortable mattress that I have ever purchased! I loved the price I paid for it as well very reasonable. Once it came to its shape that it was supposed to be, I made up the bed and went to sleep. Believe you me, it was the best sleep I've had in a long time! I highly recommend this mattress to everyone.
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Reviewed in the United States on July 13, 2025 by Sharyl C. McPhee
Style: Full
Size: 12Inch
Make sure when you open the box, you move out of the way! It opens up and rolls out really fast! I was shocked at the quality of the mattress. It’s a very comfortable mattress! The price is great!
Reviewed in the United States on July 14, 2025 by Connie Hicks
Style: Full
Size: 12Inch
Comfortable mattress for s great price!
Reviewed in the United States on July 16, 2025 by Paul
Style: Full
Size: 10Inch
Very good so far Time will tell the whole story Like it’s comfort and very good price
Reviewed in the United States on September 7, 2025 by mountain west
Style: Full
Size: 12Inch
I was surprised how nice this mattress was after it came out of the tiny box. Once out it expanded and is a really nice mattress. I may consider getting one for our bed instead of the guest room. It is a nice mix between firm and just right.
Reviewed in the United States on July 1, 2025 by Justin A. or Michelle
Style: Full
Size: 12Inch
I was skeptical. Bed in a box. 100 sleep night guarantee and 10 year customer service. Sold me. every easy to unroll. Box is about 50 lbs for a full sized mattress. It was pretty firm in 24 hours. If needed I could've slept on it. It says wait 72 hours. So far it's a great mattress. Way better than my old one.
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Reviewed in the United States on July 14, 2025 by Kerri & Chris
Style: Full
Size: 12Inch
One of the best mattresses ever. It inflated perfectly. No odor whatsoever. Soft yet firm. You can't go wrong. The size is accurate, it's a straight forward and easy set up. No complaints at all I have one in a twin and a full. I'm waiting for them to make a cali king so I can buy that one too.
Reviewed in the United States on June 16, 2025 by Angelik Martinez