Igloos Men's Acrylic Cuff Cap with Thinsulate Ribbed Shell: 100% Acrylic, 8X1 Rib, 9Gg, 2 Ply, Insulation: 40 Grams Of 3M Thinsulate Insulation (65% Olefin, 35% Polyester), Lining: 100% Polyester Tricot Imported 100% Acrylic Knit Cuff Cap Ribbed Knit Thinsulate Insulation Lining