Are you a self-taught mechanic? Do all of your buddies come to you with questions on rebuilding an engine, or fixing that transmission? This is the shirt for you. Personalize with your name, up to 14 characters, and wear with pride. T-shirts are 100% cotton, sweatshirts are a 50-50 cotton/poly blend. Imported shirts. Printing in the USA. Machine wash. Black color. No rush delivery available.