Serta Deluxe 12-inch California King-size Memory Foam Mattress

by Serta
Today: $602.49
MSRP: $1,129.99 $527.50 (47%) off
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ITEM# 15847534
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ITEM#: 15847534

Crafted from thick and indulgent memory foam, this king-size mattress will embrace your body for a luxuriously comfortable night's sleep. The 2.5-inch top layer of premium memory foam combines with a middle layer of air channel foam that adds breathability and customized support to improve circulation. The 7-inch base layer gives the mattress long lasting durability and support, while the naturally microbe and dust-mite resistant material makes this mattress a great choice for those who have allergies, or anyone who wants a great night's sleep.

  • Quilted cover 
  • 12 inches thick
  • Spot clean only
  • California King-size
  • Improves circulation
  • Never needs turning
  • Resistant to dust mites
  • Naturally antimicrobial
  • Assembled in the USA
  • Premium, 3-layer design
  • Adjusts to body temperature
  • 3 pound density memory foam
  • Evenly distributes body weight
  • Can be used with existing frame
  • Cradles body to reduce pressure points
  • Great for platform beds and slatted frames
  • Minimizes impact of sleep partner's movements

  • 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
  • Mattress: 12 inches high x 72 inches wide x 84 inches long

Memory Foam Tips:
  • Remove from packaging within 72 hours of receipt to maximize memory foam expansion.
  • This product arrives very tightly packed. Unwrap and allow 48 hours for this product to return to its original shape.
  • Being sealed in plastic packaging sometimes traps odors. After unwrapping, allow product to air for a few hours.
  • 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 Memory Foam
Thickness 12 Inch
Memory Foam Type Foam, Memory Foam
Density 3 Pound
Mattress Top Quilted, Specialty, Tight Top
Mattress Support Medium
Product Features Antimicrobial, Bed in a Box
Recommended Foundation Type Bed Slats, Box Spring, Platform
Size California King
Dimensions 12 inches high x 72 inches wide x 84 inches long
Warranty 20 year Limited Manufacturer
Model Number MT43870CK3L
Country of Origin United States

Customer Reviews

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

  • Comfortable, little on the firm side
    Verified Purchase

    I was trying to decide between this mattress and some of the other mattresses sold on Overstock. Saw a number of negative reviews on some of them, and was hesitant to order this mattress because there were no reviews posted. After finding some reviews on other sites (which had the mattress for ** higher if not more, I proceeded with the order from Overstock. The mattress comes very well packaged, the cardboard box has a cardboard sleeve on the inside which holds the outer plastic sleeve with the bag containing the mattress. The mattress itself is in a vacuum bag and is fairly heavy. As with all other memory foam mattresses, on this one the same advise goes: Place the vacuum packed mattress on the bed / box spring prior to opening, it's a lot easier to get it in place (especially if you're setting it up by yourself). The mattress took only ~1 hour to expand to it's size, and I didn't notice any odors coming from the mattress. I am using a platform bed with slats as base for the mattress. Overall it is very comfortable, but more firm than I expected (I only had foam toppers on a standard mattress before). However it contours nicely after laying on it, and I sleep better than I did on my traditional mattress with topper.

    Read More
  • Wonderful mattress!
    Verified Purchase

    Comfortable sleeping mattress that has miraculously eliminated most of those morning aches and pains. Not to hot or too cold to sleep on, molds to my contours, and remolds when I change positions. Either satin or microfiber sheets work well with it. Have not tried cotton or blends.

    Read More
  • Best mattress. Wish we had purchased it sooner.
    Verified Purchase

    This matress is the best ever. I wish we had purchased it before our last one. It is the best nights sleep we have ever had. When you receive the matress make sure you don"t open the plastic until you place it on the bed frame it is going on. After it is open it is a little hard doing it alone. Great value!!

    Read More
  • Most Recent

  • love the firmness
    Verified Purchase

    when I go out of town or stay at my boyfriends house at night all I do is wish I was home in my own bed

    Read More
  • Comfortable mattress
    Verified Purchase

    It's amazing. This mattress came in a box that was about 48" high, 24" wide and 24" deep. You open the box and the mattress is wrapped in a Saran like wrap. Just cut the wrap and the mattress opens and you never would know that it was all folded up. The mattress is very comfortable. I'm short and it was placed on a pedestal in a park model trailer so I need a small step to get up on it. With the mattress being 12" high I have a little trouble getting the sheets on. I personally would go with a bit thinner mattress, but my husband wanted this one. I would and have recommended this mattress to others.

    Read More
  • Like a glove
    Verified Purchase

    Great value for the steal of a price. Feeling a difference in my back.

    Read More
  • only good for ONE year! Then breaks DOWN!
    Verified Purchase

    My back has NEVER hurt so bad! It's been over a year now and the mattress is SO broken down! Sinks in the middle! I am so upset!

    Read More
  • Mom
    Verified Purchase

    Got this for my son, who on the fly needed a new bed. I came in a box! We didn't even know it was the bed but he said it's the most comfortable thing he's slept on.

    Read More

Questions & Answers

  • Q:

    "Does the bed come with the frame?"

    Have an Answer? Be the first to answer this question!
  • Q:

    "Can this mattress be used on an insta lock glided bed frame? "

    • A:

      Not sure what an insta-lock frame is, but this mattress should be used with a box spring for maximum comfort & resilience.

  • Q:

    "Would this mattress be considered soft, medium, or firm? "

    • A:

      This is a medium firmness.

    • A:

      This is a medium firmness.

    Read more Read less
  • Q:

    "Can this mattress be used on top of a box spring as opposed to slats or platform bed? Thanks"

    • A:

      This mattress can be used on top of a box spring as well.

  • Q:

    "Why did you choose this product?"

    • A:

      Excellent price and primarily great reviews

    • A:

      very good tested product and excellent price

    • A:

      familiarity with product., price and 10% off first order for opening an credit account, the latter of which I can see no evidence of. I hope that doesn't become a problem.

    • A:

      the price was right and Ive heard that memory foam is very comfortable. The reviews were helpful as well

    • A:

      Master bedroom

    • A:

      I was looking for a memory foam bed but could never afford one. This was priced just right

    • A:

      Brand name, and price

    Read more Read less
  • Q:

    "Apologies this question is not related to the mattress, what is that platform bed used in the picture to showcase this mattress?"

    • A:

      Thank you for your question, Heidi. Unfortunately, that bed is unavailable. We are sorry. Please check out the Dakota Reclaimed Wood Platform Bed, item 15338118. Have a great day.

Shopping Tips & Inspiration

Shipping & Returns

Contact Information
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.
Standard shipping details
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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.
More Details

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.