thin blue line flexfit hat american flag l/xl thin line tatical this athletic, flexfit hat is a powerful way to promote law enforcement support. the vivid thin blue line embroidery complements the black background. the unique design reflects a commitment to the protection of our communities. to wear the thin blue line american flag is to show your support to the men and women across the country that risk their lives to defend the public. a portion of your purchase is donated to the national law enforcement memorial fund. we are proud supporters of law enforcement and are committed to our mission of raising funds for non-profit police charities.