Iso-Cool Memory Foam Mattress Topper with Outlast Cover, California King 3-Inch thick temperature sensitive memory foam 300 thread count , 100% cotton cover combined with Outlast Adaptive Comfort Technology Quilted with 11 ounces per sq/yd RichLoft polyester fiber fill 15-inch TightGrip skirt fits mattresses up to 20 inches deep Hypoallergenic and machine washable cover California King measures 70 x 80 x 3 inches Made in the USA and Imported Iso-Cool and RichLoft are registered Trademarks of Carpenter Co