This mattress pad is soft and very breathable Fitted elastic side which help keep the pad in place 100% cotton outer material and filled with cotton This mattress pad is designed to make your sleep surface softer and more breathanble It has a very highend 100% cotton outer material and it is also filled with cotton. This combination of materials is what you need to keep you mattress more comfortabe and also help protect your mattress from body oils or perspiration. The pad can also be cleaned in you wahsing machine for years of service. Most pads today have polyester and filled with polyester which will reflect body heat and make you sweat at night which is the opposite of what a quality mattress pad is supposed to do. Mattress pad also has fitted elastic sides which will hug your mattress. We recommend buying the best the first time and be happy that you did. If you have any questions click contact seller anytime.