Think While It Is Still Legal - Funny Legal Shirt, Science T 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 This Think While It Is Still Legal Shirt makes a great gift for scientist! Lightweight, Classic fit, Double-needle sleeve and bottom hem