Engineer Because Badass Isn't An Official Job Title 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 Perfect gift for friends and family t-shirt! For engineers Bad ass engineer computer science or electrical and civil Lightweight, Classic fit, Double-needle sleeve and bottom hem