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Christopher Knight Cool Tencel 11-inch Queen-size Gel Memory Foam Mattress

by Christopher Knight Home
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ITEM# 15417395
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ITEM#: 15417395

Green Tea helps to reduce odors, charcoal helps to draw heat in and whisk moisture away. Bio Foam is the process in which natural seed oils are used instead of harmful chemicals
  • First Layer: 0.5 inch of cool gel-infused memory foam
  • Second Layer: 1.5 inches breathable pressure relief memory foam
  • 3rd Layer: 2 inches advanced spinal support poly foam layer
  • Base Layer: 7 inches high-density reflex base foam
  • Bottom Cover: Non-slip fabric
  • Cover: Poly Jacquard with Aloe Vera
  • Size: Queen
  • Green Tea helps to reduce odors
  • Zippered cover for easy professional cleaning
  • Density: 3 pounds in top layer
  • Warranty: 20 year Manufacturer's warranty
  • Dimensions: Queen size 60 inches wide x 80 inches long x 11 inches high
  • Memory foam is resistant to dust mites and is naturally antimicrobial
  • Temperature sensitive foam adjusts to your body temperature so you stay warm
  • Improves circulation while reducing pressure points
  • Eliminates motion transfer and uncomfortable pressure points
  • Never needs turning
  • Disperses your weight evenly
  • Great for platform beds and slatted frames
  • Meets all flammability standards


Finish Charcoal  , Green  , Natural  
Mattress Type Foam, Gel Memory Foam, Memory Foam
Thickness 11 Inch, 5 Inch, 7 Inch
Mattress Top Plush Top
Mattress Support Medium
Product Features Antimicrobial, Bed in a Box
Recommended Foundation Type Bed Slats, Box Spring, Platform
Size Queen
Dimensions See Details
Warranty 20 year Limited Manufacturer
Model Number OST5511-Q
Country of Origin China

Quality Rating

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Features for Rugs

See All Features

Product Reviews

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

  • Perfect Mattress
    Verified Purchase

    This mattress is everything I wanted it to be. Definitely helped my back issues.

    Read More
    juls2014 May 19, 2014
  • Love, love,love, this mattress! Great purchase!
    Verified Purchase

    I purchased this mattress for my 12 year old who states that he hasn't slept this well in years! He loves his mattress so much that he goes to sleep well before his schedule bedtime. My husband who likes a traditional mattress and box spring slept on it for two nights and now wants to convert to the Christopher Knight Cool Tencel Mattress. I tried it out and he was right! I will definitely be ordering one for our bed. The best bang for your buck is to buy this mattress now! I promise you will have no regrets! Overstock.com thank you so much!

    Read More
    nichmi May 8, 2014
  • I do like this firm matres and i think was a good
    Verified Purchase

    Very happy because I think is a good buy I love it an recommended to any person

    Read More
    coralita Oct 2, 2013
  • So Comfortable and Cool
    Verified Purchase

    I purchased this item with previous foam mattress experience and loved it. It is actually cooler. A lot of people complained about a smell - I didn't smell anything. The mattress does need time to expand. Though I had a delivery problem , Overstock was quick to address my concerns. Regular queen size sheets fit just fine.

    Read More
    amandalr712 Sep 23, 2013
  • Comfortable
    Verified Purchase

    The mattress is comfortable. It does have an odor to it. I noticed but my husband did not. It did go away after about two weeks. Would buy again.

    Read More
    chilipepper29 Sep 23, 2013

Questions & Answers

  • Q:

    "will this mattress work on a flat platform bed?"

    • A:

      Hello aseretinmo, this will work great with a platform bed. Thank you for shopping with us.

  • Q:

    "would regular queen size sheets fit on this mattress?"

    • A:

      Hello conifer1! This mattress looks so comfortable! Yes, standard queen sheets should work with this mattress. I hope this helps. Thanks for shopping with us.

  • Q:

    "Would this mattress be considered a relatively firm mattress as far as Memory Foam mattresses go? Also, because of the Bio Foam would this not have as much of the smell that others have complained about with other Memory Foam mattresses?"

    • A:

      Thank you for shopping with us megslie. This would be considered medium firmness. The smell that others report will leave usually within 3 days. I have a foam pad and it did take about 3 days before there was no odor. Have a great day.

  • Q:

    "Would this mattress work well on an adjustable frame?"

    • A:

      Hello heatherpoe1975. Thanks for your interest in the n Sleep Cool Tencel Gel-infused 11-inch Queen-size Memory Foam Mattress . No this would not work on an adjustable frame. I hope this helps you, and thanks for shopping with us.

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.