The world's first blue jean. Since Levi's® invented it in 1873, the 501® Jean has been a blank canvas for self-expression. A cultural icon, always original. This pair is designed with innovative stretch technology woven into the vertical "warp" threads of the denim. The jeans stretch vertically instead of horizontally, and move in all the ways you do while still keeping their shape. As a result, they offer all-day comfort while maintaining the classic "rigid" look that defines the 501®.