The MaxCool Mattress Pad is well-know for its cooling comfort thanks to DuPont CoolMax cooling fiber technology. This 40% CoolMax fiber - 60% polyester top layer is breathable, hypoallergenic, moisture-wicking, and water-resistant providing an exceptional cooling layer for warm sleepers. Unlike other polyester fabrics, the patented layers in Cool Max mattress pads provide protection and cool comfort for a better night s sleep. Moisture resistant layers include a hypo-allergenic microfiber/polyester hollow-fill middle layer for moisture wicking and absorbency, and a soft vinyl bottom layer for peace of mind. The stretch-to-fit design easily fits up to 18"" deep mattresses and keeps the mattress pad in place — even for the most restless sleepers. Available in multiple sizes.