Igloos Men's Acrylic Cuff Cap with Thinsulate Shell: 100% Acrylic, 1X1 Rib, 12Gg, 2 Ply, Insulation: 40 Grams Of 3M Thinsulate Insulation (65% Olefin, 35% Polyester) Imported 100% Acrylic Knit Cuff Cap Super Stretch Thinsulate Insulation Lining