Which of the following is NOT true of "jeans"?

Jeans are very popular with young people all over the world. Some people say that jeans are the "uniform" of youth. But they haven’t always been popular. The story of jeans started almost two hundred years ago. People in Genoa, Italy, made pants. The cloth made in Genoa was called "jeans," the pants were called "jeans". In 1850, a salesman in California began selling pants made of canvas. His name was Levi Strauss. Because they were so strong, "Levi’s pants" became popular with gold miners, farmers, and cowboys. Six years later, Levi began making his pants with a blue cotton cloth called denim. Soon after, factory workers in the United States and Europe began wearing jeans. Young people usually didn’t wear them.
   In the 1950s, two people helped make jeans popular with teenagers: Elvis Presley, the king of rock and roll, and James Dean, a famous movie star. Elvis wore tight jeans. Most parents didn’t like Elvis or his music. But teenagers loved him and started to dress like him. In Rebel Without a Cause, James Dean wore jeans. He was a here to many young people.
   Now jeans are so popular that Levi’s has sold over twenty billion pairs. Almost anywhere in the world you know what young people want to wear: jeans!