100% polyester. Russell Smart Softshells are smart looking, bonded 2-layer softshells WITHOUT a membrane, providing a higher degree of breathability. Durable Water Repellent Du PontTM Teflon« Coating, two layer softshell material without membrane, 2 zipped pockets, inside-out zippers, cadet collar, drop tail, protection against wind and chill, higher degree of breathability, microfleece lining, back neck tape, bound inside seams on zip, headphones access.