I Back the Blue for My Grandfather Thin Blue Line Police TeeMachine wash cold with like colors, dry low heat I Back The Blue for My Grandfather is a beautiful American flag patriotic graphic t shirt designed for the granddaughter of a grandpa who is a police officer. Let your police officer grandfather know that you have his back and that you back the blue in America. At a time when police and law enforcement in America face tremendous danger and disrespect, this attractive thin blue line American flag t shirt