The Thin Blue Line, an idea originating in the United Kingdom, now offers the Thin Blue Line UK flag hat! This athletic, flexfit hat is a powerful way to promote law enforcement support. The vivid Thin Blue Line patch complements the black background. The unique design reflects a commitment to the protection of our communities. To wear the Thin Blue Line UK Flag is to show your support to the men and women across the country that risk their lives to defend the public in the United Kingdom.