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King Size Mattress, 12 Inch King Mattress in a Box, Memory Foam Hybrid Matress with Individual Pocket Spring for Motion Isolation, Pressure Relief, Medium Firm Feel, CertiPUR-US

  • Based on 242 reviews
Condition: New
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$285.99 Why this price?
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Availability: Only 2 left in stock, order soon!
Fulfilled by CY Official

Arrives Oct 16 – Oct 19
Order within 20 hours and 9 minutes
Available payment plans shown during checkout

Style: King


Size: 12Inch


Features

  • Reinforced springs for comfort and support:The SupremeSleep mattress king size, featuring gel memory foam and individually wrapped coils, evenly distributes weight and relieves pressure without disturbing your sleeping companion. It includes two rows of reinforced pocketed coils at the perimeter, offering exceptional edge supportideal for those needing stability at the mattress king edges.
  • Ergonomic Design:This king size bed mattress, with its 3D breathable knitted fabric cover and multi-layer foam structure, offers superior ventilation and moisture-wicking properties, ensuring a safe and healthy sleep environment. Its hybrid construction includes 7-zone independent pocketed coils that adapt to your body's shape, whether you sleep on your back, side, or stomach, thus enhancing sleep quality through its tailored ergonomic design.
  • King size mattress in a box:The king mattress 12 inch arrives vacuum-packed and rolled in a box for convenient doorstep delivery. Carefully unbox and unfold the mattressit may expand quickly upon opening, please maintain a distance. For optimal comfort, allow it 48-72 hours to fully expand and for any potential odors to dissipate before use.
  • CertiPUR US Certified:Your health is our priority, which drives our rigorous material selection. The memory foam in this king hybrid mattress is CertiPUR-US certified, guaranteeing it is free from fiberglass and other harmful substances, ensuring your safety and well-being.
  • Customer Service:Our dedicated SupremeSleep mattress support team is available 24/7 to assist you. We confidently stand behind our firm king mattress, committed to ensuring your complete satisfaction.

Brand: SupremeSleep


Size: 12Inch


Product Dimensions: 80"L x 76"W x 12"Th


Top Style: Breathable and Supportive Top


Cover Material: Cotton


Number of Layers: 3


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


Product Dimensions: 80 x 76 x 12 inches


Item Weight: 84 pounds


Manufacturer: SupremeSleep


Item model number: SupremeSleep 12K


Date First Available: November 12, 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 16 – Oct 19

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Do what's suggested and wait before you sleep on it
Style: Queen Size: 12Inch
I love this bed did EXACTLY what it suggested waited the proper amount of time and it sleeps wonderfully. Medium firmness, great quality for the money, pops right out the sealed bag/easy to set up just let it sit not to heavy.
Reviewed in the United States on June 22, 2025 by Sherri Elwood

  • Great bed all around
Style: Queen Size: 12Inch
The mattress is very soft great quality fast shipping easy setup
Reviewed in the United States on June 27, 2025 by Megan

  • I love this mattress! Must buy!!
Style: Queen Size: 12Inch
OMG! I love this mattress! It's perfect for my back pain, which was the #1 reason that I was in the market for a new mattress. I'm a plus size woman (275 ish pounds) and laying on it just hugs my body. I'm a side sleeper and I feel no pressure points went sleeping. My back feels great when I wake up, no more rolling out the bed slowly. ... show more
Reviewed in the United States on June 23, 2025 by Jo

  • Comfy Resting
Style: Queen Size: 12Inch
Great Comfort in the medium/hard range to me!!! A Great Buy!!!
Reviewed in the United States on June 30, 2025 by David

  • careful when opening
Style: Queen Size: 12Inch
great mattress for the price really comfortable just be careful when opening it i accidentally cut a bit of the fabric while using the cutter provided
Reviewed in the United States on March 21, 2025 by Jarren

  • Best bed ever
Style: Queen Size: 12Inch
The mattress was amazing it didn't take the whole 72 hours to fully rise and it didn't smell. I sleep amazing now
Reviewed in the United States on April 23, 2025 by Destinee Tabron

  • The quality is not good
Style: Queen Size: 12Inch
I only had it for 1 month and it’s already dented in smh I thought it was hard but actually it’s too soft
Reviewed in the United States on May 17, 2025 by Jessica Maria Hernandes

  • Confortable 100%
Style: Queen Size: 12Inch
It is super confortable, really nice to sleep, it is worth it
Reviewed in the United States on June 26, 2025 by Joanna canas

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