As stated at the beginning of this article, the masterminds behind this famous creation (no, we are not exaggerating. Yves Saint Laurent always said he wished he had invented blue jeans) were Jacob Davis and Levi Strauss. The goal was to create practical workwear.  And they achieved it! The denim fabric made jeans resistant and perfect for this kind of work. But like everything new in the market, the jean needed some upgrades. Then, the workers complained about their pockets ripping off, and that was one of the reasons why Levi invented their popular copper rivets.  Most changes made in the first 50 years of the jean's history were related to the needs of the workers. That included the famous indigo color of jeans.