Suitable for outdoor use, show your appreciation of your local police and fire departments. This 3' x 5'  Nylon flag is reinforced on the outer fly for long lasting use. The dual use flag is a combination of the classic Thin Blue Line (USA) and Thin Red Line (USA) flags.  The Thin Blue Line (USA) design takes the idea that originated in the UK and makes it part of the USA flag. The blue line represents law enforcement, the black field on the top represents the public while the black field on the bottom represents the criminals. The idea behind the graphic is that law enforcement (the blue line) is what stands between the violence and the would-be victims of crime. The Thin Red Line is a symbol used by fire departments to show respect for firefighters injured and killed in the line of duty.   This flag is made in the USA.