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Member Only Item

SleepBetter™ Iso-Cool™ by Isotonic® 3" Memory Foam Mattress Toppers


3", 100% Premium Temperature Sensitive Memory Foam, 5 Year Warranty

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  • Shipping & Handling included *

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Member Only Item

The estimated delivery time will be approximately 5 - 7 business days from the time of order.

Isotonic®, America’s most trusted brand name in memory foam, provides the finest comfort products in the world. Our IsoCool 3-inch temperature sensitive memory foam topper, features Outlast® Certified GOLD, which helps to balance your ever changing body temperature. This combination allows you to Sleep Cool, Sleep Comfortable, All Night™. IsoCool™ products by Isotonic® feature the highest concentration of Outlast®, Not Too Hot, Not Too Cold™ materials available. Our IsoCool™ foam topper also features a 300 thread count quilted cover, which is filled with 11 oz. per square yard of luxurious polyester fiber for added comfort and support. The cover includes a 15” Tight-Grip™ skirt that fits mattresses up to 20” deep; which helps keep the topper firmly in place. Our exclusive premium memory foam is designed to give you superior support and pressure relief. Isotonic® IsoCool™ topper, the perfect combination of comfort technology designed to help you SleepBetter!  


  • Cover features: Outlast® Certified Gold. Not Too Hot, Not Too Cold™ technology
  • 3 Inch 100% Visco-Elastic memory foam pad is temperature sensitive
  • 300 thread count cotton cover
  • 100% cotton quilted cover is easily removable and washable
  • Luxurious polyester fiber fill for added comfort and support
  • Hypoallergenic
  • Baffle Box Construction helps keep fiber from shifting
  • 15” skirt, fits mattresses up to 20”
  • 5 year warranty
  • Care Instructions: machine wash warm, gentle cycle, tumble dry; Spot clean foam
  • Made in the USA (cover made in China)

  • Cal-king: 70" x 80"; 47-oz. fill  
  • King: 76" x 77"; 49-oz. fill  
  • Queen" 58" x 77"; 38-oz. fill  
  • Full: 51" x 72"; 31-oz. fill
  • TwinXL: 37" x 77"; 27 oz. fill
  • Twin: 37" x 72"; 22-oz. fill

  • Brand: SleepBetter
  • Drying Recommendation: Tumble Dry
  • Quilted: Yes
  • Size of Bed Mattress: Multiple
  • Thread Count: 300 Threads per Square Inch

Standard shipping via UPS Ground is included in the quoted price. The estimated delivery time will be approximately 5 - 7 business days from the time of order.

Express shipping is via UPS. The estimated delivery time will be approximately 3 - 5 business days from the time of order.

Please choose your shipping method at checkout.

An additional Shipping and Handling fee will apply to express shipments. This fee will be quoted at checkout.

*Delivery is available to Alaska and Hawaii. An additional Shipping and Handling fee will apply to shipments going to Alaska or Hawaii. This fee will be quoted at checkout. Additional transit time may be required.

Delivery is not available to Puerto Rico. 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:
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