The mattress pads are generously filled with a "billowy cloud" of bonded polyester for an extra layer of padding & comfort. The top panel is quilted with 50% polyester and 50% cotton material allowing year-round comfort. The mattress pad fits sleeping surfaces up to 18 inches in profile, ideal for today's super pillow-top mattresses. Fully elasticized "Sure-Grip" skirt for a snug fit. Convertible Versafit design provides an exquisite fit on all mattress styles- High Profile, Waterbed, Conventional and more. Machine wash and cool dry for best results.