Yarn-dyed chambray is a synthetic fabric made of a blend of dyed and bleached yarns, with cotton as the main raw material, and traditionally used to make work clothes for young people. This fabric became popular after World War II, and the early light blue youth work shirts of the US Navy greatly promoted its popularity. Yarn-dyed chambray mainly uses darker warp or weft threads interwoven with white weft or warp threads, presenting medium and light tones, and the fabric is smooth and soft, making it an economical and affordable material for daily clothing. Compared with denim, yarn-dyed chambray is lighter and more breathable, and is not easy to produce a heavy feeling. It has a wide range of uses, including shirts, casual clothes, and work clothes. In recent years, with the advancement of cloth-making technology, the styles, yarn combinations and color designs of yarn-dyed chambray have become more diverse, and the range of items that can be made has expanded to shoes, hats and tablecloths. Its simple style and simple lines present a youthful atmosphere, which is particularly suitable for fabrics composed of 45% cotton, 35% linen and 20% polyester, and is used to make light clothing such as shirts, jackets and cardigans.