Trivia: Which of these clothing innovations was developed during WWI?
Correct Answer: Zipper
So why is this answer correct? : The B.F. Goodrich Company debuted the name “zipper” for its new fastener in 1923, but the invention itself first showed up during World War I. U.S. army uniforms did not have pockets at the time, so the army made an order for zippers to be used with money belts that would carry accessories. While buttons remained the standard for fastening uniforms, zippers also started being sewn into the suits of military pilots in the 1920s.