Search  for anything...
Sealy

Sealy - Memory Foam Bed in a Box – 12 Inch, Medium Feel, King Size, CopperChill Technology, CertiPur-US Certified

  • Based on 3,308 reviews
Condition: New
Checking for the best price...
$882.19 Why this price?

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – 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

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: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Oct 1
Order within 13 hours and 6 minutes
Available payment plans shown during checkout

Recently Viewed

Color: Onyx


Size: King


Style: 12"


Features

  • Set Up: Simply take your mattress out of the box and enjoy watching it decompress. Jumping, walking, and sleeping on your mattress can speed up the process.

Description

All the comfort and trusted quality of a Sealy mattress, now conveniently packaged in a ready-to-ship box. Fall into a cradling memory foam top that “hugs” your body all night long, so you wake up refreshed and ready to take on the day. This Twin XL 12-inch memory foam mattress combines distinct layers of foams—including a top layer infused with CopperChill —to provide comfort and support for all sleepers, and the 12-inch silhouette has even more foam for the most rejuvenating Mattress-in-a-Box experience. At Sealy, we want to help you live your best life, which is why we made the delivery and setup of this mattress hassle-free. When your Mattress-in-a-Box arrives, simply place the mattress on your bed, remove the packaging, and allow time for the bed to decompress and expand to its comfortable shape. Includes knit cover and 10-Year Limited Warranty.

Brand: Sealy


Size: King


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


Top Style: Pillow Top


Fill Material: Memory Foam


Color: Onyx


Model Name: Memory Foam


Product Benefits: Experience a cradling memory foam mattress that supports all sleepers, hassle-free delivery, and a rejuvenating sleep experience See more


Product Care Instructions: Hand Wash Only


Comfort Layer Material: Memory foam


Item Weight: ‎96.9 pounds


Product Dimensions: ‎80 x 76 x 12 inches


Country of Origin: ‎USA


Item model number: ‎F03-00103-KG0


Date First Available: September 20, 2017


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Oct 1

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.

  • 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.

Similar Products

Top Amazon Reviews

    • comfortable
Color: Dreamlife Size: Twin XL Style: 12"
went from firm to plush and my back feels better, mattress arrived before the base so it had a few days to expand completely very satisfied
Reviewed in the United States on January 2, 2025 by Amazon Customer
    • Good quality, fast delivery
Color: Onyx Size: Twin Style: 8" Thin
We were reluctant to buy without trying, but gave it a shot based on the great price. Very glad we did. It arrived quickly and expanded as soon as we opened it. We had it on the bed in a matter of minutes. Had heard some complaints about other foam mattresses needing to air out, but this one had no odor beyond the typical new mattress smell. We are using this on a set of twin bunks and it seems to work fine on slats, at least for kids and lighter weight adults. We got a traditional foam and spring Sealy from a local mattress store for the second bed because we wanted some versatility, but it's hard to beat the ease and comfort of this mattress for the price. I'm not sure how anyone would go about returning this if they didn't like it -- it's very compressed and tightly rolled and I don't think it would be easy to recompress it by hand to get it back in its box. An unexpected benefit is that it's much less bouncy than a traditional coil mattress, so our kid does less crazy jumping. ... show more
Reviewed in the United States on December 16, 2018 by Sam Eagle
    • We own two
Color: Onyx Size: Twin Style: 8"
This mattress is great. Comfortable, durable, but yes firm. I personally love a firm mattress so no complaints here. Both my kids sleep on these and I've never heard a complaint. Had one used daily since 2021.
Reviewed in the United States on November 14, 2024 by Travis
    • Comfy but HOT *New Update*
Update: October 2019. It’s been 8 mos since purchasing this mattress. Just wanted to update on how it is holding up. The mattress remains as firm as it was immediately after purchase. There are no dips or worn spots in the areas my husband and I sleep in. We rotate the mattress every other time we change the sheets. So, maybe twice a month. My husband is 6’ and about 220lbs. I’m 5’6” and about 150lbs. He is a side and back sleeper with arthritis from several old back, shoulder, and hip injuries from his military career. I am a stomach and side sleeper with arthritis in my back and hips from years of riding and showing horses. The support remains amazing. The overheating problem was resolved when we switched back to our goosedown duvet instead of the synthetic comforter we were using. I guess it just breathes better. Overall, we are so pleased with this mattress that we’re starting to convert the other 3 children’s beds to these mattresses. We’ve already switched the infant to Sealy’s foam crib mattress. No crinkling to wake her up. She sleeps like a rock. If or when this mattress wears out, we’re definitely buying another one to replace it. This has to be the best mattress we’ve ever bought. Highly recommend. The mattress arrived in perfect condition. It expanded quickly. Definitely a Medium Firm- Firm support level. I’m 38 weeks pregnant and it is very comfortable for my back, hips, and supports my stomach well while laying on my sides. This mattrress sleeps so unbelievably hot though. I thought it might be a pregnancy thing but my husband confirms. Our teenage son also fell asleep in our bed reading the other night while I was watching tv and woke up in a full sweat too. I’m thinking of adding a gel mattress topper to help cool it down and get us through the summer. We’re in the southeast on the coast of SC and I’m not going to make it through summer with this mattress like it is. 5 stars for awesome support comfort and quality. But I had to take one away for the misery of waking up dripping in sweat every night. ... show more
Reviewed in the United States on March 21, 2019 by JWells
    • Great find!
Color: Onyx Size: Twin Style: 8" Thin
I’ve been looking for a perfect mattress that’s not not too soft or too hard. After searching several department stored, I decided to give this a try. The feel is perfect at a price 1/3 of what the store offered, and free delivery with Prime.
Reviewed in the United States on July 17, 2024 by sky
    • One Of The BEST Investments For Better Sleep I Have Made
Color: Onyx Size: Full Style: 8" Thin
I did not review this right away as I wanted to wait until I had actually slept on it for a month or so. Now that it has been about a month and a half I will say that this is one of the best investments for sleep comfort that I have ever made. I have had lower back issues along with left shoulder problem since my early 20s (I am now just south of 70). I have read about mattresses with memory foam tops for several years now and thought someday. So back in February I saw Sealy was having sales on their mattresses and found this particular one on Amazon. I will say now that I have slept on it for almost two months that I would say it is worth the non-sale price for the better sleep it has provided me in this past 6-7 weeks. The mattress was packed into a box that when you look at it you wonder how in the world can it contain something as large as an 8 inch mattress but if you follow the easy directions and let it sit for at least 24 hours, you will see that it does. It does have some weight to it so be sure to take the plastic off when you have it laying on the bed frame where you are placing it. In the past 6-7 weeks I have experienced some of the best sleeping hours experienced in many years (really cannot remember how long it has been). I fall asleep faster, do not awaken that often and my lower back pain is probably about 2/3 improved over what it was previously. My left shoulder issue is also improved. While, at my age, I know these problems are never going to be fully resolved, this amount of improvement is extremely welcome. The only problem that I can note about this mattress is that I really do not want to get out of bed in the morning because it is so comfortable. ... show more
Reviewed in the United States on April 6, 2020 by PawPawRon
    • LOVE IT!
Color: Onyx Size: Twin Style: 8"
Review Image by StacyLee StacyLee
Night 3 of my son (almost 3yo) sleeping in his new big boy bed. He really loves it. He fells asleep faster and It is REALLY comfy. the picture was right off the box and was already at 7,5inch….After 24h the corner was “formed”. It’s more of a medium/ firm mattress for adults and firm mattress for toddler. My son sleeps through the night and he keeps saying that his bed is comfy and he is happy of his new bed! So it’s a huge WIN for my husband and I. OVERALL it’s a 5 ⭐️for us! Fit perfectly his IKEA Neiden bed frame. ... show more
Reviewed in the United States on August 2, 2024 by StacyLee StacyLee

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...