Machinist Shirt - I'm A Machinist Shirts 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 Machinist Shirt, Machinist Tshirt, Machinist T shirt Machinist Shirts, Machinist Tee Shirt, Machinist Tshirts Lightweight, Classic fit, Double-needle sleeve and bottom hem