Serta Perfect Sleeper Liberation Cushion Firm King-size Mattress and Box Spring Set

by Serta
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ITEM# 13687357
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ITEM#: 13687357

The Serta Perfect Sleeper 'Liberation' is an official mattress of the National Sleep Foundation, designed to help solve many of the most common causes of poor sleep.

  • Set includes: Mattress and Foundation
  • Construction: Firm
  • Support: Medium firm
  • Materials: Memory foam, cotton, foam, fiber, wood, steel
  • Awarded a Consumers Digest 'Best Buy'
  • Visco-elastic Memory Foam gently conforms to your body to reduce the pressure points
  • Serta's exclusive Continuous Support Innerspring provides superior support to maintain proper spinal alignment
  • Total Edge Foam Encasement prevents sagging at the mattress edges.
  • Meets all federal flammability standards with Serta's patented FireBlocker system.


  • Mattress set: 22 inches high x 76 inches wide x 79.5 inches long
  • Mattress: 13 inches high x 76 inches wide x 79.5 inches long
  • Two Foundations: 9 inches high or low profile 5 inches high x 38 inches wide x 79.5 inches long

White glove home deliveries require a 4-hour window to complete delivery; this includes delivery of the mattress, set-up in the room of your choice, removal of all packaging and debris and removal of your old mattress upon request. Please note that there is no surcharge for additional flights of stairs. You will be contacted by the home delivery agent when the product is ready for delivery (typically 1 to 3 weeks), we recommend requesting product removal at the same time you schedule your home delivery appointment.

30-Day Comfort Guarantee - If you are not satisfied with your purchase within 30 days, you may return your order for a refund less a re-stocking fee. After 30 days, the mattress cannot be returned.


Mattress Type Innerspring, Memory Foam
Thickness 13 Inch
Mattress Top Plush Top
Mattress Support Firm, Medium
Dimensions See product description
Warranty 10 year Limited Manufacturer
Model Number 175141860
Country of Origin United States

Customer Reviews

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

  • Mattress
    Verified Purchase

    So comfortable. Best night sleep on this mattress.

    Read More
    louise d. Nov 22, 2017
  • Firm is true
    Verified Purchase

    This user earned $2.00 in rewards for writing this review.Learn More

    This was a firm mattress . I like it once I got used to it. Good quality nice fabric. It is firm as stated. Not a lot of padding so you may want to add a topper

    Read More
    luckygal615 Sep 28, 2017
    Verified Purchase


    Read More
    CAROL I. Apr 14, 2017
  • RN
    Verified Purchase

    I did my homework on these mattress. Very satisfied with this purchase

    Read More
    bibi71 Nov 27, 2015
  • The mattress breaks down very quickly.
    Verified Purchase

    I had read other reviews about this mattress, but ordered it anyway. I shouldn't have. The mattress begins to sag within months of purchase. Will need to checkout the warranty because it is too late to return.

    Read More
    Jamie K. Apr 20, 2015
  • Most Helpful

  • Best Mattress Set Ever!
    Verified Purchase

    My husband needs hip replacement at a very young age and has been in considerable pain. This mattress is recommeded by the National Orthopedic Foundation, so I thought it was worth a shot ordering it over the web. Since we bought this mattress set, he is experiencing much less discomfort at night, and it is much less pain in the morning. This was a very good purchase.

    Read More
    katrinamichaels Nov 11, 2011
  • Excellent mattress set
    Verified Purchase

    I was nervous about make such a large purchase "sight unseen". However, we live in rural Maine, couldn't find a comparable price for the quality locally, and didn't want to spend time and money driving to the city to shop, only to have to then deal with delivery issues. My husband and I are both delighted with the mattress set. It is firm yet comfortable, as described. Also, kudos to Overstock for excellent delivery service. We were notified and kept informed, even when a snow storm interfered. The delivery personnel were professional and efficient. Thank you.

    Read More
    207windrose Jan 16, 2012
  • just what the doctor ordered...
    Verified Purchase

    I've had 4 shoulder and 1 neck sugeries. this mattress takes care of all my needs.firm but still very comfortable.

    Read More
    kinsey94 Mar 10, 2012
  • Great mattress, great deal
    Verified Purchase

    We knew we were taking a risk by buying a mattress online without feeling it in person, but I'm so glad we did. We love our new mattress and are also very happy with the price (and free delivery!). The mattress came on time and we were notified beforehand so we knew to be home for the delivery. I am on Overstock again right now to buy another of the very same mattress for our other home. I highly recommend this product.

    Read More
    ilikeostock Feb 29, 2012
  • Great purchasing experience
    Verified Purchase

    I purchased the king-sized mattress set as a birthday gift for my son who lives in another city. I experienced sticker shock when shopping for mattresses that were on sale with retailers. So I thought giving him this special gift was not an option for me. The Serta mattress is top-of-the line and cost 1/4 of the ones on sale in stores. The delivery men set up the mattress and foundation and removed all packaging. But most important to me, they hauled away his old one, which my son was not in a position to do. Thank you, Overstock, for making this the best purchasing experience ever!

    Read More
    lindawsmt Jan 28, 2012

Questions & Answers

  • Q:

    "how long has this mattress been out of stock? is there any idea if it will be restocked within the next couple of months?"

    • A:

      Hello bhcarter22, unfortunately this item is out of stock. We currently do not have inventory to check, and cannot guarantee the item will be restocked. Thank you for shopping with us.

  • Q:

    "Is the 30 day Comfort Guarantee thru Overstock? What is the restocking fee if I'm not satisfied with the mattress set within 30 days?"

    • A:

      There would be no restocking fee. The 30-day comfort guarantee comes from

  • Q:

    "What is the mattress heighth with and without boxspring?"

    • A:

      The mattress is 13.25 inches high and the box-spring is 9 inches high. Together, the two are 22.25 inches high.

  • Q:

    "How many layers of foam are there, where are they located, and how thick are they?"

    • A:

      •1" Comfort foam •1" Hi ifd support foam •532 Continuous support innerspring with foam encasement •Advanced comfort quilt, fire blocker, pillow-fill, soft convoluted 0.5" comfort foam

  • Q:

    "Is the cover woven or knitted?"

    • A:

      This item does not come with a cover.

  • Q:

    "What is the wire gauge and coil count of this mattress?"

    • A:

      The coil gauge is 13.25 inches and the coil density is 672. The term coil density is used instead of coil count when you have a Foam Encased mattress.

Shopping Tips & Inspiration

Shipping & Returns

Contact Information
1-4 week delivery after the item ships:**

Delivered by freight carrier. See Oversized Item Delivery Policy.

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

Oversized Item Delivery Policy:

This item will be shipped via freight carrier to your home, excluding rural routes, remote areas not in close proximity to areas commonly serviced by freight carriers, islands, APO/FPO addresses, P.O. Boxes, Alaska and Hawaii. Please provide your daytime and evening phone numbers during check out so our carrier can contact you to schedule delivery. Refer to our Oversized Item Delivery Policy for additional information.
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.