Sleep Sync 12-inch Cal King-size Memory Foam Mattress

by Sleep Sync
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ITEM# 14369190
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ITEM#: 14369190

Get a great night's sleep in this Sleep Sync memory foam mattress. This mattress is 12 inches thick for extra comfort. The memory foam contours to your body, which improves circulation and eliminates sore muscles upon waking. The California king mattress allows even the tallest sleepers to stretch their legs.

  • 12 inches
  • Medium Firm
  • 3.0 pound memory foam, 1.8 pound convoluted foam, 1.8 pound foam spring support base
  • 72 inches wide x 84 inches long x 12 inches thick
  • Pressure sensitive memory foam molds to your body to provide increased circulation and gentle support.
  • Improves circulation while reducing pressure points that can disrupt your sleep
  • Mattress eliminates motion transfer and uncomfortable pressure points
  • Never needs turning
  • Disperses your weight evenly
  • Mattress can be used with an existing frame
  • Great for platform beds and slatted frames
  • Meets all flammability standards
  • 100-percent rayon fabric from rayon from bamboo fibers

Memory Foam Tips:
  • To maximize memory foam expansion; remove from packaging within 72 hours of receipt.
  • This product arrives very tightly packed. Please unwrap and allow 48 hours for this product to return to its original shape.
  • Being sealed in plastic packaging sometimes traps odors. A few hours of airing usually removes 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

Once opened this product is non-returnable.


Mattress Type Mattress Only, Memory Foam
Thickness 12 Inch
Memory Foam Type Foam, Memory Foam
Mattress Top Specialty
Mattress Support Firm
Product Features Antimicrobial, Bed in a Box
Recommended Foundation Type Bed Slats, Box Spring, Platform
Dimensions See Details
Warranty 20 year Limited Manufacturer
Model Number MEFREFS120CK
Country of Origin China

Customer Reviews

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

  • 12" cal king
    Verified Purchase

    Great quality mattress for the price! Purchased to replace a waterbed mattress in a hard frame. Fit perfect with enough depth so you don't hit your legs on frame. A bit more firm than expected, but I am still getting used to it. Very comfortable. Would recommend.

    Read More
    brad58lee Jun 21, 2014
  • Awesome bargain, price and comfort!
    Verified Purchase

    Very pleased with my purchase, at first a little apprehensive of course but couldn't beat the value in comparison to my mother in law's. (She paid $900 for her queen size vs our cal king!)

    Read More
    pmendoza956 Apr 17, 2013
  • Most Recent

  • Cali King Mattress
    Verified Purchase

    Love this mattress. Best sleep ever! Very firm and comfy. Also quite warm. If you like firm, then this is the mattress for you. Definitely worth the price.

    Read More
    bobbiwilt Aug 25, 2017
  • As advertised
    Verified Purchase

    Everything advertised by this product is exactly as it is. It is firm but not too firm. Good product

    Read More
    Jazmyn D. Aug 20, 2016
  • purchased this a few years ago
    Verified Purchase

    and still very happy with it. Still feels just like it did 5 years (or however long ago it was) ago when I bought it. I was dubious about how they were going to ship it and when it came all sucked up in a bag I thought "No way is that going to pop back to a 12 inch cal king size....but it did.

    Read More
    poniegirl Aug 10, 2016
  • Dr.
    Verified Purchase

    Very hard at the beginning; have tendency to deflate at the edges causing potential for fall injury.

    Read More
    James B. Nov 9, 2015
  • Very Nice Mattress!
    Verified Purchase

    Bought based upon a few reviews and we are very happy. Super comfy, I would buy again.

    Read More
    Charles G. Jul 30, 2015

Questions & Answers

  • Q:

    "Why did you choose this product?"

    • A:

      My wife recommended

  • Q:

    "This question wasn't answered - how many inches of Memory Foam are on top of the other types of foam. According to the Dec 26, 2012 answer, there is only 1" of memory foam total? That's not possible."

    • A:

      Hello tcman1, The layers for this mattress consists of the following: 2 in Memory Foam 3 in Convoluted Engineered Latex Foam 7 in Reflexa Foam Base. Have a great day!

  • Q:

    "How thick is the memory foam layer?"

    • A:

      Second layer density: 1 inch of 1.8 pound convoluted memory foam.

  • Q:

    "Is the entire mattress flexible in that in an bent slightly to get up tight, angular staircases?"

    • A:

      Yes, this is flexible enough to bend.

    • A:

      This is foam and will bend.

    • A:

      A couple months ago we were moving and didn't want to store our mattress in the barn with the rest of our stuff so we actually managed to squeeze it into our motorhome and into the bunch over the cab. of course it stuck out quite a bit as it was a calking size and 12 inches thick. I slept up there for 2 months and had to squeeze in there, but it worked and when we got our new house we wrestled it back out and up the stairs to the new room.

    Read more Read less

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
Expedited shipping details

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


This item cannot be shipped to Alaska or Hawaii. 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.