Young Brunette Girl Undresses Her Jeans On Rocky Mountains

Evolution of the garment
Initially, jeans were simply sturdy trousers worn by workers, especially in the factories during World War II. During this period, men's jeans had the zipper down the front, whereas women's jeans had the zipper down the right side. By the 1960s, both men's and women's jeans had the zipper down the front. Historic photographs indicate that in the decades before they became a staple of fashion, jeans generally fit quite loosely, much like a pair of bib overalls without the bib. Indeed, until 1960, Levi Strauss denominated its flagship product "waist overalls" rather than "jeans".
After James Dean popularized them in the movie Rebel Without a Cause, wearing jeans by teenagers and youth and/or young adults became a symbol of youth rebellion during the 1950s. Because of this, they were sometimes banned in theaters, restaurants and schools. Nowadays, however, jeans are worn to many types of venues and events, even some events that ostensibly require formal attire.
During the sixties the wearing of jeans became more acceptable, and by the seventies it had become general fashion in the United States for casual wear.