Don't Be Sheep Be - Be A Porcupine Libertarian Party Shirt Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat Don't Be Sheep Be - Be A Porcupine Libertarian Party Shirt Libertarians Unite! Lightweight, Classic fit, Double-needle sleeve and bottom hem