Search  for anything...

King Size Mattress - 12 Inch Hybrid King Size Mattress in a Box, Upgrade Strengthen, Gel Memory Foam King Matress with Motion Isolation, Strong Edge Support and Pocket Springs, Medium

  • Based on 346 reviews
Condition: New
Checking for product changes
$239.95 Why this price?
Save $40.00 was $279.95

Buy Now, Pay Later


As low as $39.99 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

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 7 left in stock, order soon!
Fulfilled by Amazon

Arrives Wednesday, Mar 5
Order within 5 hours and 58 seconds
Available payment plans shown during checkout

Style: 12 Inch Medium


Size: King


Features

  • Breathable & ComfortableKing size mattress curated with high-end fabrics for a soft, silky touch. Exclusive knit fabric technology is both breathable and sweat-wicking and keeps you warm for the perfect sleep experience
  • Unparalleled Sleep EnjoymentMattress King size has a patented supportive technology that ensures every part of your body fits perfectly for unprecedented relaxation, effectively relieving fatigue and allowing you to have a better night's sleep
  • Perfect Scientific CombinationKing bed mattress is made of individually pocketed springs and multiple layers of premium memory foam, expertly layered in our high-quality memory foam and ultra-high-density base foam for ultimate support
  • King Mattress in a BoxUnlike the traditional 2 coils, we offer the Hybrid Mattress with the addition of 3 coils, which enhances the mattress's edge support and superior barrier against the effects of your partner's movement. Achieve a quiet and comfortable deep sleep

Brand: SIMARTH


Size: King


Product Dimensions: 79.92"L x 75.98"W x 12"Th


Top Style: Pillow Top


Cover Material: Skin-friendly fabric


Number of Layers: 9


Fill Material: High density foam and individual pocketed springs


Weight Limit: 1000 Pounds


Special Feature: Breathable, Pressure Relief, Individual Pocketed Coil System


Color: Black, Dark Gray


Product Dimensions: 79.92 x 75.98 x 12 inches


Item Weight: 72.8 pounds


Manufacturer: AWT Store


Item model number: 5ecb53ad-af58-4da4-aa8d-863b12702f71


Date First Available: July 19, 2024


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Mar 5

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


  • Quality mattress
This bed is comfy and the right firmness for me as a side and stomach sleeper. It comes with the tool to cut open the vacuum sealed bag that it comes in. It expands fairly quickly once removed from the packaging. Great quality.
Reviewed in the United States on February 23, 2025 by Jessica Wence

  • very comfortable
The mattress inflated within a day but I had planned to not be home while it did for the weekend. The bed as a whole is very comfortable, soft but you don't sink into it; it has helped with my back pain. The only part I didn't like is the edges, they have no support, if I sit on the edge to put my shoes one it sinks all the way down. ... show more
Reviewed in the United States on February 17, 2025 by SmallP10

  • The quality outweighs the price by far
Style: 12 Inch Medium Size: King
This bed is soooo comfortable! My lady and I fall asleep immediately. Going from a Queen to a King was the best move, and for this price you can't beat it.
Reviewed in the United States on February 6, 2025 by This is a great shower head! Great pressure and amazing settings! Definitely recommending this.

  • Comfortable
Style: 14 Inch Size: Queen
The bed is very comfortable I just wish the edges were a little more firm. But other than that love it!
Reviewed in the United States on February 14, 2025 by Dee Hale

  • Bubble bed
Style: 14 Inch Size: Queen
This bed is comfortable, but it feels like there’s a slight dome shape to it. Like someone really heavy needs to sleep in the middle for a week. I’m hoping as we sleep on it, that will improve. But other than that, it’s a comfy bed, fluffed out nicely in 12 hrs. Good deal for the price
Reviewed in the United States on January 3, 2025 by Alicia Roberts

  • Queen bed
Well first off I had to wait 5 days to get this bed then an other 3 days to sleep on it so first of all it says it's a med firm we'll it is not for over 200 it's like a box spring solid dnt even sink it a bit not at all it's more like a firm box spring type mattress and from pic I seen shown 5 layers of foam but only has 3 from an other pic I seen so this is getting returned and also they say 100 free night to test but yet customers have to pay to send it back which is bs if there's a 100 free night test so I dnt no about these beds it's not for me ... show more
Reviewed in the United States on January 22, 2025 by Jesse vallejos Jesse vallejos

  • Good mattress
Well spent money, very good mattress, no more back pain, good night sleep, fits perfectly on queen frame, expanded very fast, waited 48 hours to sleep on it no smell, supports weight perfectly, no imprints
Reviewed in the United States on February 15, 2025 by Amazon Customer

  • Easy to unpack and super comfortable!!
Style: 14 Inch Size: Queen
Buy a mattress online is not an easy pick but this one was absolutely perfect! Right in the middle as indicated . Not too firm not too soft . Great quality, super easy to unpack , no smell and I no need to “wait” to use. Overall, great money for value . Not sure for how long it will last but so far so good . ... show more
Reviewed in the United States on October 18, 2024 by Amazon Customer

Can't find a product?

Find it on Amazon first, then paste the link below.