The quartz infused fiber acts as a heat conductor that conducts heat away from your body, providing a cooling sensation throughout the night. The quartz and polyester infused fiber is knit for a soft feel, yet has a high resistance to wear and tear. This mattress pad fits up to a 20 inch mattress and is filled with hypoallergenic polyester fill, for a great night’s sleep. Includes: One twin mattress pad 39x75 inches with a 16 inch skirt. Mattress pad face is made from soft cooling knit fabric with a non-woven reverse. Filled with 8oz/yd2 of 100% polyester. This item is machine washable; however, please make sure equipment is large enough to allow the item to move freely in wash.