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Sealy Dreamlife 12” Foam Mattress-in-a-Box, King, SealyComfort Gel Memory Foam, SealySupport Transition Foam, Surface-Guard Technology

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Availability: In Stock.
Fulfilled by Amazon

Arrives Jun 28 – Jun 29
Order within 22 hours and 58 minutes
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Style: 12"


Size: King


Features

  • 2.5 SEALYCOMFORT GEL MEMORY FOAM: This cushioning gel memory foam layer conforms to the shape of your body, providing tailored pressure relief and support where you need it most
  • 2.5 SEALYSUPPORT TRANSITION FOAM: This additional layer of high-density foam enhances the overall comfort of the king mattress in a box by offering extra support and durability
  • CERTIPUR-US CERTIFIED: The Sealy Dreamlife mattress foam meets the strict standards set by CertiPUR-US, ensuring it is made without certain harmful chemicals including formaldehyde, ozone depleters, phthalates regulated by the U.S. Consumer Product Safety Commission, or mercury, lead or other heavy metals.
  • SURFACE-GUARD TECHNOLOGY: Built-in antimicrobial protection with Surface-Guard Technology helps prevent the growth of bacteria and the buildup of allergens on the mattress surface
  • 10-YEAR LIMITED WARRANTY: Rest assured with reliable comfort, this king memory foam mattress is backed by Sealys rigorous product testing for exceptional quality and long-lasting durability

Description

This Sealy® Dreamlife™ 12” Foam King Size Mattress is designed to help you stay cozy all night (or all day) and wake up feeling refreshed. And it’s made by Sealy®, a leader in quality sleep products for over 140 years. Advanced SealyComfort™ gel memory foam adapts and responds to every part of your body to provide pressure relief and a personalized sleep experience, while SealySupport™ Transition Foam enhances the overall comfort of the mattress and adds long-lasting durability. Sealy® Dreamlife™ is also dedicated to promoting a healthier sleep environment. CertiPUR-US® ensures the mattress foam meets strict standards for content, emissions and durability, and Surface-Guard Technology™ kills bacteria on the surface of the mattress, protecting it from common allergens which can lead to a better night’s sleep. This mattress was designed and built in the USA and includes a 10-year limited warranty, so you can rest easy with comfort you can count on.

Brand: Sealy


Size: King


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


Item Weight: 81.6 Pounds


Item Firmness Description: Plush


Top Style: Gel Top


Cover Material: Polyester


Number of Layers: 2


Fill Material: Gel Memory Foam


Special Feature: Pressure Relief


Item Firmness Description: Plush


Number of Layers: 2


Additional Features: Pressure Relief


Construction Type: Gel Foam


Is Customizable?: No


Is Foldable: No


Size: King


Item Dimensions L x W x Thickness: 80"L x 76"W x 12"Th


Item Weight: 81.6 Pounds


Item Thickness: 12 Inches


Item Dimensions: 80 x 76 x 12 inches


Item Depth: 12 inches


Cover Material: Polyester


Fill Material: Gel Memory Foam


Product Care Instructions: Spot clean only - wipe area with a light damp sponge or vacuum with a soft brush attachment to remove particles.


Mattress Comfort Layer Material: Gel Memory Foam


Material Type: Memory Foam, Spandex


Brand Name: Sealy


Model Name: Memory Foam


Product Benefits: Pressure Relief


Model Number: F03-00237-KG0


UPC: 810143391077


Manufacturer: Sealy


Set Name: Dreamlife King 12"


Manufacturer Part Number: F03-00237-KG0


Unit Count: 1.0 Count


Included Components: Mattress


Age Range Description: Adult


Item Type Name: Bed Mattress Conventional


top-style: Gel Top


Color: Dreamlife


Style Name: 12"


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jun 28 – Jun 29

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.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Firm yet soft! Good mix of support and comfort
Style: 8" Size: Full
Purchased 8” full size for my 11yr old son’s first big bed. He’s a stomach sleeper. This mattress is amazing and I’m a side sleeper and when laying in this bed it also feels supportive. I am pleasantly surprised- I’d describe it as firm yet soft. It’s very comfortable on pressure zones
Reviewed in the United States on June 3, 2026 by Kenzie

  • Great Mattress
Style: 14" Size: King
Great mattress and price? We purchased this king mattress for our vacation home and to be honest it was great. I do recommend letting sit after opening 24 hrs to make sure it expands completely. Mattress does sit on a medium feel. If you looking for a firm mattress this might not be your top choice.
Reviewed in the United States on May 18, 2026 by Asigler

  • Will it be comfortable
Style: 14" Size: Twin XL
Love it! Doesn’t hurt back hips and sleeping much better. Worth price.
Reviewed in the United States on May 20, 2026 by SALLY

  • Very good quality for the price Very good quality for the price
Style: 8" Size: Full
Very comfortable for 8 inch mattress. Pretty firm expanded instantly when I opened the plastic package, fit nicely in my bunk bed. My cats use it for their sleeping area.😸
Reviewed in the United States on April 30, 2026 Reviewed in the United States on April 30, 2026 by Ronald Chen

  • Not soft.
Style: 12" Size: Queen
Excellent mattress. Not soft or plush like described.
Reviewed in the United States on June 1, 2026 by Tyler

  • Comfy. Exactly as described
Style: 10" Size: King
Great mattress
Reviewed in the United States on May 24, 2026 by Andrew Wheeler

  • Great ultra plush bed!
Style: 12" Size: Queen
I was extremely nervous to buy a mattress online without testing it out in person. I got the ultra plush bed. As soon as I opened it up, I laid down on it, and I know that you need to wait about 48 hours for it to fully inflate, but let me tell you I immediately took a nap on that bed. I have never been more comfortable. It's crazy because while laying in bed I can feel my spine being straight. Even though I'm lying on my side, I've never slept in a bed like that. It is very plush but not to the point where as soon as you sit down you sink and you can't get back up. You do sink a little bit, but it complements your body curves. It's been a really long time since I've been able to sleep this well. Update: I loved this mattress at first but the spring and summer time have been terrible. I literally wake up in a pool of my sweat everyday. I am never hot , and this bed makes sleeping terrible if it's warm out. I even bought multiple mattresses toppers that are cooling and they don't even do anything to help. ... show more
Reviewed in the United States on February 19, 2025 by Xana

  • I use it with an adjustable bed frame
Style: 10" Size: Full
So comfortable and glad I already had this bed as I injured my back and helps waking up without being stiff. Also I use my bed with an adjustable bed frame the best.
Reviewed in the United States on May 7, 2026 by Angel

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