Serta Deluxe 12-inch King-size Memory Foam Mattress

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MSRP: $1,129.99 $530.00 (47%) off
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ITEM# 15847535
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    Serta Deluxe 12-inch King-size Memory Foam Mattress
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    ITEM#: 15847535

    Rejuvenate yourself with this luxurious memory foam mattress from Serta. The mattress boasts three layers of memory foam technology for a uniquely restful and pain-free sleep experience, conforming to your body's contours and eliminating the transfer of motion from your sleeping partner. This therapeutic and revitalizing mattress is also naturally antimicrobial and dust mite resistant.

    • Premium, 3-layer design
    • 2.5-inch top layer premium memory foam for cradling comfort
    • 2.5-inch middle layer air channel foam for breathability, customized support
    • 7-inch base layer support foam for stability, long lasting durability
    • Maintains shape without flipping or rotating
    • Evenly distributes body weight
    • Minimizes impact of sleep partner's movements
    • Measures 12 inches thick
    • Density: 3 pounds
    • Cover care instructions: Spot clean
    • Resistant to dust mites, naturally antimicrobial
    • Originally designed for NASA, the space age foam cradles the body, reducing pressure points
    • Adjusts to body temperature
    • Improves circulation
    • Never needs turning
    • Can be used with existing frame
    • Great for platform beds and slatted frames
    • King dimensions: 12 inches high x 76 inches wide x 80 inches long

    Memory Foam Tips:
    • Remove from packaging within 72 hours to maximize foam expansion.
    • This product arrives very tightly packed. Unwrap and allow 48 hours to return to its original shape.
    • Being sealed in plastic packaging sometimes traps odors. Allow product to air for a few hours.

    Once opened this product is non-returnable.


    Mattress Type Memory Foam
    Thickness 12 Inch
    Memory Foam Type Foam Memory Foam
    Density 3 Pound
    Support Medium
    Mattress Top Specialty
    Product Features Antimicrobial
    Recommended Foundation Type Bed Slats Box Spring Platform
    Dimensions 12 in H x 76 in W x 80 in L
    Warranty 20 year Limited Manufacturer
    Materials Memory Foam
    Model Number MT43870KG3L

    Customer Reviews

    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    • Nice and Firm!

      We recently bought this mattress and I am super happy with it! My wife likes the plushy mattresses but I was tired of them. I sleep face down and I would sink in with the plushy mattresses. I would wake up with terrible back pain. This Serta Deluxe 12 inch mattress is nice and firm. We paired it with a CozyClouds by DownLinens Billowy Clouds Mattress Pad, which we also found here on OverStock. Great mattress, great pad and overall the best prices on the internet!

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    • falling apart at the seems

      i have had this mattress for a few months and it is coming undone at the seems on the sides. comfortable to me, but worsened my husbands back pain.

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    • Heaven

      My husband and I have been sleeping on this mattress for a couple of months now. I must say I haven't slept better. It supports me in every way. I use to only sleep on my back or stomach but this bed allows me to sleep on my side without discomfort. Would recommend to anyone looking for a new mattress or interested in trying out memory foam. It's awesome!

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    • Outstanding

      A great, firm mattress. If you like solid this is a good mattress for you.

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    • good

      good mattress, I just got it, have not fully tried it yet, but looks good. it has a little smell, I will open window to let it spread out.

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    • Nana

      After reading other reviews on this mattress, I took the advise of 1) unboxing it in the room and 2) propping it against an open window for one overnight to eliminate the odor; both excellent suggestions. The mattress is all you could want for comfort and design. As it is new, I cannot give any hints to longevity, only to a much better sleep and night.

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    • Much firmer than I expected!

      After sleeping on a mattress that was way too soft for years, we decided to buy one that was firmer. This mattress is very solid once it opens. It gives a little, but it's still much firmer than I expected. We will need to get a topper to soften it a little. It has good support and it's a great base, but I want a little more give on the top. It does not transfer motion and I can't even tell when my husband rolls over or gets out of bed. I was pleased to see that it was manufactured in the town I live in. Delivery was super fast.

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    • Great mattress...a little too firm

      This mattress is great. It arrived in 5 days after ordering it. It is the perfect height for our platform bed without a box spring. It has a lot of support but is a bit too firm. It's hard to buy a mattress online without testing it first! I thought the memory foam might soften up a little after a while but it didn't so we went ahead and bought a cheap memory foam mattress topper and put that on which made the mattress perfect. There is a lot of support from the mattress and the pad on top adds the perfect amount of cushion. Considering you can buy the same mattress on Amazon for **** more, I think this was a great deal and would absolutely recommend it.

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    Questions & Answers

    Get your product questions answered right here.
    • Why did you choose this product?

      • Son needed to upgrade his mattress. You had the best deal plus free shipping. I read the reviews and decided to give an on line order for such a big purchase a try.

      • Wanted a bigger bed. We have a serta memory foam mattress presently and love it.

      • feel that Serta is a good brand

      • I liked the amount of gel memory foam combined with the 2nd layer that has cooling pockets. I also liked the 12 inch height.

      • We slept on one at a friends house and really liked it.

      • I need a new mattress and it is what I can afford. It sounds good to me.

      • Its Big

      • Name and PRICE

      • its the best

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    • Do you carry the bed frame in this picture?

    • Is this mattress packaged compressed in a box much smaller than the actual size of the mattress? If so approximately what is the packaged dimensions? Thank you

      • Hello Sparky, the approximate box dimensions are 41 inches high x 20 inches wide x 24 inches deep. This weighs approximately 104 pounds. Thanks for shopping with us!

    • I am really considering getting this mattress at this deal, but I'm scared of getting it and it having a great pet peeve of mine. HEAT! Some of the reviews say its a problem others doesn't. Is there any fair info you can give me and in the event of getting it and heat is an issue what are cost effective solutions to problem. I seen one review say they woke up sweaty. Really don't want that.

      • Hello Mike, memory foam does tend to retain body heat, if this is worrisome for you, then i would suggest going with a memory foam mattress that has gel, which will help to keep you cool. If you search for "king gel memory foam mattress" in our search bar, you will find a wonderful selection. Thanks for shopping with us! A.S.

    • isn't king size usually 80 X 80? Your dimensions state 76 X 80

      • Hello MrsEngley, that is correct on the dimensions, the standard for a king size mattress is 76 inches wide by approximately 80 inches long. Thank you for shopping with us!

    • how does this mattress compare to the Serta Pierta gel memory foam queen size mattress in terms of firmness

      • Thank you for the question beeno01. I am sorry but we do not have the information to compare the two mattresses together. This particular mattress has received very favorable reviews. I looked on other sites and can say that the Pierta also got favorable reviews especially when talking about heat dissipation. I am sorry I couldn't answer the question. Have a great day and thanks for visiting our site.

    • does this mattress come with box-spring bases?

      • Thank you for shopping with us prodgers35. This does not come with a foundation. Here is our selection of mattress systems. Have a great day.

    • Any warranty??

      • Hello njmsmom, this has a 20 year Limited Manufacturer warranty. Have a great day!

    • Hello how much does this mattress weigh

      • Hello jjbittinger, this is 104 pounds. Have a great day!

      • I do not know the exact weight but I can tell you that the average size person isn't going to be moving it alone. I can't move it even an inch. But that is one of the reasons I wanted it. Our previous mattress was like sleeping on a trampoline.

      • It took 2 of us to carry it upstairs.

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    • Have you had any complaints about the odor of this mattress?

      • Hello golfingjays, we currently do not have any reviews on this item so there is no way for me to see any complaints. I just got my first memory foam mattress last month it also is a serta and it had no smell at all. These beds are so comfortable! Have a great day!

      • We did not notice too much of an odor at all. Guess we were lucky.

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    • how come this has no reviews? I'm trying to see if this one is similar or as good as the 8-inch Serta Memory Foam Mattress.

      • Hello eliast, This is a new item so there are no reviews yet. From my experience with memory foam I think this one would be better than the 8 inch because it has Three foam layers where the other one only has 2. Happy shopping!

      • We got the 12. Very firm, we do like it and would buy it again, but it could be a little softer.

      Read more Read less

    Shopping Tips & Inspiration

    Shipping & Returns


    Usually leaves our warehouse in 1-2 business days. *

    Mattress Return Policy:

    Mattress Sets are non-returnable upon signature at delivery. Mattresses are non-returnable if opened or taken out of their plastic wrapping.
    More Details

    Shipping Information:

    Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final shipping cost and estimated delivery timeframe will be available at checkout.
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    * For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

    ** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.