The term "retired flag" in the context of the Air Force refers to the Department of the Air Force seal, which contains the Air Force shield. This shield was unveiled in January 2000, following a period of research and planning. Official Status: The US Air Force Retired flag became official on May 5, 2004, and the Air Force also released guidelines for its appropriate use. The shield's design uses elements from the 1951 flag, and it features three stars representing the Army, Navy, and Air Force, with the Air Force star being the largest, symbolizing its position as the youngest service. Suitable for Parades or Indoor Display, Annin Flagmakers Colonial Nyl-Glo Flag is made of 100% Nylon and trimmed with two inch gold rayon fringe. The flannel lined pole hem sleeve slides over a standard 1 ¼ inch diameter pole, and attaches by an inner tab. This flag is 100% Made in the USA to Official Specifications. The indoor/parade 3X5' size flag is designed to display with an 8' mounting pole.