5.7 oz./yd, 100% polyester. Anti pill microfleece . Cling free backing. Convertible collar. Dyed-to-match piping. Single barrel toggle drawcord waist. Twill neck tape and back yoke. Open hemmed cuffs. Non-rust dyed-to-match zippers. Nylon-reinforced zippered side pockets. Formerly FeatherLite 3301.