Retired police officer saying - Cool thin blue line T-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 thin blue line shirt, thin blue line t shirt, police officer shirt, police officer gifts, retired police officer gifts Lightweight, Classic fit, Double-needle sleeve and bottom hem