Permafresh represents a break through in technology: It"s long lasting protection helps protect against common bacteria and dust mites. Permafresh Mattress Pad Features 100-Percent polypropylene Fits mattresses up to 15-inch deep. Includes one mattress protector that measures 39-inch W by 75-inch L + 15-inch H. Machine wash cold, gentle cycle, tumble dry low, do not bleach. Made in China.