Funny Engineer Problem Solving Solution Coffee Sarcasm 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 Great gift idea for your favorite engineer, especially if they like dishing our sarcasm. Available in several dark colors like black, blue, and brown. Napkin Sketch Lightweight, Classic fit, Double-needle sleeve and bottom hem