誰可以幫我看一下有沒有要改的地方
The first jeans came in two styles, indigo blue and brown cotton "duck." The duck material wasn’t soft and comfortable so now is not to be use anymore. Jacob was the tailor and one of Levis customers, wrote to Levi Strauss, tell him of the process he invented to rivet the pocket corners on men’s pants. On May 20, 1873, they received the patent for rivets on men’s pants. They began making copper riveted “waist overalls” in San Francisco.