What was the name of Levi's denim collection launched in 1999 with articulated construction?

Levi's Engineered Jeans was the denim collection launched in 1999 with articulated construction.

The collection used unusual seaming and shaping to follow the body's movement. Instead of treating jeans as flat pieces with conventional side seams, the design used a twisted, three-dimensional approach. This gave the range a distinctive appearance and a more flexible feel.

Engineered Jeans is sometimes confused with SilverTab, another fashion-oriented Levi's line associated with loose silhouettes. The names refer to different collections. Engineered Jeans is identified by its articulated construction, while SilverTab is chiefly remembered for relaxed and baggy fits popular during the 1990s. Both helped Levi's reach consumers looking for alternatives to traditional workwear styling.