The History of Fashion: Most Important Style Moments of the 20th Century

 1960s: Pillbox Hats   

While hats had been worn as a necessity in previous years, in the '60s they became an accessory. According to Vintage Fashion Guild, even the Catholic Church ended its requirement of hat wearing to mass in 1967. Small pillbox hats were worn on neatly teased hair to add extra volume, while floppy hats were mostly worn by the freedom-searching youth. 

14

https://www.slice.ca/fashion/photos/history-of-fashion-most-important-style-moments-20th-century/#!history-of-fashion-pillbox-hat