Skip to Main Content
Member Only Item

$999.99 After $150 OFF

Sleep Science Black Diamond 11" Cal-King Memory Foam Mattress

Item #601664

Valid 10/23/14 through 11/16/14. While supplies last.

Online Price $1,149.99
Less -$150.00
Your Price $999.99
  • Shipping & Handling included *


Member Only Item

The Sleep Science Black Diamond Memory Foam Mattress layers proprietary bamboo charcoal visco memory foam and supportive latex.   The Sleep Science black diamond visco memory foam is the latest advancement in the Sleep Science memory foam line.  

Black diamond visco memory foam was developed after researching the 1000 year old practice of utilizing bamboo charcoal fibers for its unique properties. Sleep Science blends bamboo charcoal fibers into its proprietary visco memory foam to create the black diamond visco memory foam. Bamboo charcoal fibers neutralize moisture in localized areas; eliminates odors and increases the antibacterial properties of the foam.

The top layer of this mattress consists of 5lb density, black diamond visco memory foam. It is the perfect top layer to absorb moisture and dissipate odor. The second layer is made of Sleep Science 5lb density premium visco memory foam to provide an added layer of comfort. The latex layer provides exceptional support for the visco memory foam. The mattress features the Sleep Science patented Wedge, edge to edge support system. The Wedge is an angled piece of firm polyurethane foam that runs along the outside edge of the mattress. It provides a stable sitting edge, 20% more sleeping surface than the competition and extends the life of the mattress by preventing the foam from spreading after prolonged use. The base features the Sleep Science air channel base which is made of high resilient polyurethane foam, that is scored horizontally and vertically in 1 inch grooves to promote air circulation in the center of the mattress, creating a temperature neutral environment.  

  • Bed frame is not included
  • Sleep Science comfort scale: Plush top layer with medium/firm support
  • 11” Black Diamond Memory Foam Mattress fits the dimensions of your bed
  • Meets the requirements of 16 CFR Part 1633 – federal flammability (open flame) standards
  • Limited Warranty: 20 Years
  • Mattress cover sleeping surface is made with a silk blend fabric
  • The cover is removable and washable
  • Mattress top layer: 1” of proprietary 5 lb black diamond bamboo charcoal visco memory foam  
  • Second layer: 1” of proprietary 5 lb slumber tech visco memory foam
  • Third layer: 2” of medium latex
  • Bottom layer: 7” proprietary support tech base foam
  • Patented wedge, edge to edge support system
  • Hypo allergenic and dust mite resistant  
  • Visco memory foam conforms to your body to relieve pressure points and improve circulation
  • This mattress should rest upon a flat solid surface for best results
  • First time visco memory foam sleepers, please allow 30-60 days to adjust to sleeping on a visco elastic memory foam mattress
  • Visco memory foam is temperature reactive, therefore the mattress will react uniquely to each individual’s body temperature
  • The mattress is rolled and compressed for ease of delivery. There will be a slight foam odor when first opened. It will dissipate within 24-48 hours     
  • Cal King mattress dimensions: 72”W x 84”L x 11”D; Weight: 129 lbs

If you have questions regarding this product, assembly of furniture or product operation, please call 800-723-0316 and ask for the Customer Service Department related to Costco.

  • Brand: Sleep Science
  • Primary Mattress Composition: Memory Foam
  • Size of Bed Mattress: Cal King

The estimated delivery time will be approximately
5 - 10 business days from the time of order.

Standard shipping via FedEx Ground is included in the quoted price. The estimated delivery time will be approximately 5 - 10 business days from the time of order.

If you have any customer service questions, order status inquiries, concerns regarding defective product, assembly of furniture or product operation, please call 800-723-0316 and ask for the Customer Service Department related to Costco.

Delivery is not available to Puerto Rico, Alaska or Hawaii.

Costco.com products can be returned to any of our more than 600 Costco warehouses worldwide.
Membership: We will refund your membership fee in full at any time if you are dissatisfied.

Merchandise: We guarantee your satisfaction on every product we sell with a full refund. The following must be returned within 90 days of purchase for a refund: televisions, projectors, computers, cameras, camcorders, touch screen tablets, MP3 players and cellular phones.

How to Return: For an immediate refund (including shipping and handling), simply return your purchase at any one of our Costco warehouses worldwide. If you are unable to return your order at one of our warehouses, please email customer service or call our customer service center at 1-800-955-2292 for assistance. To expedite the processing of your return, please reference your order number.

If you request an item be picked up for return, the item must be packaged and available for pick up in the same manner as it was delivered.
If your order was delivered "curb side", it will need to be available for curb side pick up.
If the item arrived to you in a box, it will need to be in a box at the time of pick up.

For information or a written copy of the manufacturer's warranty, please contact us at: warranty@contactcostco.com.
Please wait, the reviews should load in just a moment.