Serta 8-inch King-size Memory Foam Mattress

by Serta
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ITEM# 12116743
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ITEM#: 12116743

This Serta two-layer design is proven to give you a better night's sleep, it evenly distributes your body weight better than a traditional inner spring mattress for a personalized sleep experience that always feels just right. The premium memory foam comfort layer adapts to you to relieve the painful pressure points that cause tossing and turning. The base layer provides the comfortable support and stability your body needs. .

  • 2-inch memory foam comfort layer
  • 6-inch premium base layer for superior support
  • Distributes body weight better than traditional inner spring
  • Relieves painful pressure points
  • Holds its shape, no flipping or rotating required
  • Breathable cotton cover
  • Use with your existing box spring and frame, or platform bed (with no box spring)
  • Eliminates motion transfer between you and your partner
  • Improves circulation
  • Dimensions: 8 inches high x 76 inches wide x 80 inches long
    Memory Foam Tips:
  • Remove from packaging within 72 hours of receipt to maximize memory foam expansion
  • This product arrives tightly packed in a box sized to be portable; once you unwrap it, you can sleep on it the same night, although it may take 48 hours to return fully to its original shape.
  • Memory foam is inherently comfortable and supportive, no matter how firm it feels; similar items can vary in firmness due to the nature of the foam
  • Product is vacuum sealed at the factory for efficient shipping; vacuum sealing sometimes traps odors, but once opened, a few hours of airing will usually remove the odor
  • Due to machine-cutting manufacturing processes, there may be slight variances in the dimensions of this product.

Due to the nature of Memory Foam the firmness level of every item is unique. Please be advised that even similar products may produce different firmness results.


Mattress Type Foam, Memory Foam
Thickness 8 Inch
Mattress Top Specialty
Mattress Support Medium
Product Features Antimicrobial, Bed in a Box
Recommended Foundation Type Bed Slats, Box Spring, Platform
Size King
Useful Link Mattresses and Memory Foam
Dimensions 76 inches wide x 80 inches long x 8 inches deep
Model Number MT116396X
Country of Origin United States

Quality Rating

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Features for Rugs

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Customer Reviews

5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
  • Most Recent

  • Great
    Verified Purchase

    Great foam still good , recommended

    Read More
    sophie Jul 21, 2017
  • crap, don't bother
    Verified Purchase

    not worth the $, hard and sleeps hot

    Read More
    2beks Nov 5, 2016
  • VERY happy!
    Verified Purchase

    My review from 6 years ago follows this edit- 6 years later and it is still extremely comfortable. Probably the best purchase I have made, ever! It is insane how much lower a price this is than any mattress you can find in a store and such high quality.-- I ordered this mattress on Saturday. It shipped Monday and got here in North Carolina on Wednesday. I opened it around 830 pm, and slept on it within two hours. No chemical odor at all, I mean maybe if you stick your nose down into it, but everything has to have some smell, nothing that required my windows to be opened or anything that I even noticed. Slept on it last night. it is almost as tall as a piece of paper is wide (8 1/2 inches), so it got its full height. there are only a couple indentations left that haven't gained their full height back, where it was folded, but they were the parts most tightly folded, so I hope those will gain their shape today. I have horrible back, neck and other joint pain, and i worked a very long day at the hospital yesterday. Very well rested and no pain this morning. I will review again if anything changes. So happy with this purchase! will now purchase each of my daughters a memory foam. none of us got hot. I was able to turn the heater down a couple degrees, but we had been on the cold floor, so I expected it to be more insulated than that, but did not overheat at all and there were 3 of us in the bed. kids went to bed late waiting to sleep on it, and they were still well rested and on time for school this morning. love love love, overstock. I also used *** at another customer's suggestion, so i will get *** cashback. then follow the link to overstock.

    Read More
    mandyinnc Aug 26, 2016
  • Okay...for a bit
    Verified Purchase

    I've had this mattress for over three years now and it's okay. There are noticeable indentations from our sleep patterns but it's great in a pinch. Next bed will not be memory foam but maybe an ole fashion coil like mattress. Can't beat that comfort.

    Read More
    Tara B. Aug 21, 2016
  • After 5 years of use
    Verified Purchase

    So after 5 years of use, the bed hurts my back so bad that I'm dreading sleeping in it. It was great the first year or two but at this point it's unbearable. Me being 190lbs and her much less than I have been sharing the bed with our boys until 2 years ago. I think it's due to only two inches of memory foam on top instead of the 4 or so some of the other mattresses have. But only after 5 years of use, I'm not going to spend my hard earned money on this again and hope I get more than 5 years out of it.

    Read More
    hwlcd Dec 15, 2015
  • Most Helpful

  • Great bed
    Verified Purchase

    I was nervous about buying a bed online since you don't get to see the product before you buy it. But after reading many reviews and actually going to a mattress store, we decided to buy it. This bed is absolutely amazing. I have had back issues for most of my life, and after sleeping on this bed the pain has been greatly reduced. We have both noticed that not only is it easier to wake up in the mornings, we feel more rested and energized. One thing I will say though is that if you have never been on a memory foam bed, go to a mattress store to try one out first. We tried the Tempurpedic and could not tell a difference between that and the Serta, so don't be afraid if it's not the same brand. Memory foam is not for everyone, so be sure you like it before you buy one. If you know you do, then you will not regret this purchase. By the way, memory foam beds are supposed to last 20-40 years. (Much longer than a spring bed.)

    Read More
    dorothy90 Nov 19, 2010
  • Makes me late for work ;)
    Verified Purchase

    I was a bit skeptical buying a mattress online, but I gave it a shot. My very first night on this mattress made me late for work the next morning. I really didnt wanna get out of bed. After sleeping on my old spring mattress for years, this is a breath of fresh air. I let it air out for 3 or 4 hours, and slept on it the same night it was delivered. The smell didnt bother me at all. I recommend this mattress to anyone who wants a great nights rest. Its been one year and it still makes me late for work!!

    Read More
    templec Jul 6, 2011
  • Perfect for Me
    Verified Purchase

    This mattress is the best thing that has ever happened to my sleep life! After initially receiving the mattress within a week after my order was processed, the UPS guy brought the human sized box into my home for me; I opened the box, removed the plastic and the giant mattress expanded in seconds! I waited 36 hours before using the bed-even though it said 72 hours-I just couldn't hold back. That night I have never slept more sound in my life! The second night I slept in it, I awoke in the same exact position I fell asleep in. Each and every day after this I can wake up in the morning with ease as I feel completely refreshed and re-energized for the next day. I have had this product for about a month now and I can't stop bragging about it. Any other mattress from anywhere else would have been incomparable to the value I received with this purchase. The mattress itself is fairly firm which is obvious as it is only 8 inches thick but the foam makes it fell soft to the touch when you first lay down and then conforms to mold with firmness for the rest of your body. I recommend purchasing a down pillow or a memory pillow as it seemed to bother my neck with a standard pillow. Be sure to note that this product cannot be returned after removing the plastic wrapping!

    Read More
    frekles2 Nov 4, 2009
  • Love
    Verified Purchase

    Love it from day one. If you are transitioning from spring matress to memory foam, it is a bit of a shock the first/ secound day. It is super firm, but it molds to your body. I suffer of back pain due to herniated disks. Every day I wake up without pain. No more old person's walk in the morning. I waited 4 months before writing this review.

    Read More
    luck1 Jan 25, 2013
  • For what you pay it's great
    Verified Purchase

    My partner and I couldn't afford a TempurPedic right now so we opted to try a king size Serta. The mattress was easy to unpack and came to full thickness in a few hours. The smell lasted about a week for us but dissipated after. We are both big guys and the mattress is surprisingly supportive in all sleeping positions. We have it on a box spring, as we feared it would lack the support we need on a platform. My partner has been getting the best sleep of his life after giving up his coil mattress. I sleep well but am adjusting from my Tempur. We will upgrade at some point, but it's an excellent and comfortable mattress, and a great bargain.

    Read More
    monroela May 29, 2011

Questions & Answers

  • Q:

    "Can I get this same mattress around 12 inches instead?"

    • A:

      Hello eliast, I'm sorry we do not have this available in 12 inch. Here is one that is similar #15847535. Have a great day!

  • Q:

    "Does this Serta Mattress NOT have the manufacturers warranty?"

    • A:

      Hello bosswife1, This has a 20 year Limited Manufacturer warranty. Have a great day!

  • Q:

    "I currently live in Vancouver, Canada. If I order this today do you think I would get the mattress by September 28?"

    • A:

      The shipping on this item would leave the warehouse in 1-3 business days and then its 4-8 business days after that.

    • A:

      Our standard shipping time to Canada is between 6 and 17 business days.

    Read more Read less
  • Q:

    "Which serta foam mattress is this product and does it come with a box spring?"

    • A:

      This Serta item is manufactured by Sleep Innovations. It does not include a box spring, it is an 8 inch mattress topper. There are 141 reviews with a 4.6 star rating. I would say this is an excellent rating. Many use this type of mattress for a platform bed. It can also be used with a box spring.

  • Q:

    "Is this mattress hot to sleep on?"

    • A:

      It depends on the person. Memory foam can get hot, depending on density and other factors.

  • Q:

    "What is the size of the box the mattress is delivered in?"

    • A:

      Box Dimensions: Length: 22, Width: 19, Height: 38

  • Q:

    "Does it come with a manufactures warranty?"

    • A:

      This item has a 20-year Limited Manufacturer Warranty coverage on it.

  • Q:

    "Does this bed come with just the mattress or does the frames and headboard come with it too?"

    • A:

      The price is for the mattress only.

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Shipping & Returns

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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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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.
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This item cannot be shipped to Alaska or Hawaii. More details

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