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

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MSRP: $1,129.99 $598.50 (53%) off
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ITEM# 15847534
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    ITEM#: 15847534

    Enjoy bedtime with this fabulous California king-size mattress from Serta. This thick and indulgent memory foam mattress offers a superbly comfortable sleeping experience through its meticulous and high-quality construction. The top layer of memory foam embraces your body, the middle layer of air channel foam improves air circulation and the base layer provides a gentle sturdiness. With a natural resistance to microbes and dust mites, this mattress is built for the long haul.

    • Assembled in the USA
    • 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
    • Beautiful, quilted cover for extra layer of softness
    • 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
    • Cal king dimensions: 12 inches high x 72 inches wide x 84 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, Bed in a Box
    Recommended Foundation Type Bed Slats, Box Spring, Platform
    Dimensions 12 in H x 72 in W x 84 in L
    Warranty 20 year Limited Manufacturer
    Model Number MT43870CK3L
    Country of Origin United States

    Customer Reviews

    5 Stars
    4 Stars
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    2 Stars
    1 Stars
    • Most Helpful

    • Comfortable, little on the firm side

      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!

      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.

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    • Best mattress. Wish we had purchased it sooner.

      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!!

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    • Most Recent

    • Quickly Deforms

      I purchased this in Nov. 2014. Within weeks it was permanently deformed into 2 valleys that my wife and I sleep in. I expected the bed to last 10 years. I'm replacing in now in May 2016, so just 18 months.

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    • Pleasent surprise

      I am very happy with this purchase. I have gone through several mattresses and toppers to achieve a firm comfortable and sound sleep. This was the answer!! Be patient if at first you feel a slight bump in the middle or the corners have not expanded all the way. I almost returned my mattress because of these problems, but they resolved themselves in 7 days. It is perfect now and and I wish I had found this before all the expense I went through.

      Read More
    • Serta memory foam mattress

      I thought this mattress was going to be on the firm side because that's what I put in my description on the search engine, but its not firm at all its ok but not as happy with the mattress as I wanted to be. Wanted to send it back but trying to wrap up a mattress is not that easy to do.

      Read More
    • wonderful mattress

      My last pregnancy, every morning i woke up with back pain. When we found out we were pregnant this time we immediately ordered this mattress because of a recommendation . It is wonderful . it takes about two weeks for it to expand to the full 12 inches. I recommend it for heavier set people. I am only 130, but with pregnancy it still supports very well. my husband is 250 and it supports him very well. Also my parents have had this mattress for 3 years and they haven't seen any sagging at all . I am very happy with this purchase

      Read More
    • Great mattress

      I love this mattress. It's not as soft as I thought memory foam would be but it's really comfortable. I Have slept on it for about a week now. I definitely recommend it.

      Read More

    Questions & Answers

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

    • Why did you choose this product?

      • Excellent price and primarily great reviews

      • very good tested product and excellent price

      • 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.

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

      • Master bedroom

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

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

      • 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


    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.
    Standard shipping details
    Expedited shipping 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.


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