Mechanical Engineer T-Shirt Engineering 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 Trendy, brightly colored graphics. A unique gift idea for a friend or family member. Wear it day or night for an instantly awesome look! Mechanical Engineer T-Shirt Engineering Makes a Perfect Gift Lightweight, Classic fit, Double-needle sleeve and bottom hem