Denim fabric is a sturdy cotton twill textile, typically characterized by its blue color, which comes from the dyeing of the warp threads. It is commonly used to make jeans, jackets, and other clothing items. The fabric's durability and versatility make it a popular choice for casual wear. The weaving process of denim involves a unique technique where the weft thread passes under multiple warp threads, creating a diagonal ribbing effect. This structure not only contributes to its strength but also gives denim its distinctive appearance. Over time, denim can fade and develop a unique patina, adding to its appeal.