Double rib dyed knitted fabric is a kind of knitted fabric composed of a single yarn forming longitudinal coils on the front and back in sequence. It has the winding, extensibility and greater elasticity of plain fabric. Double rib dyed knitted fabric derives a variety of composite structures, among which the main ones are double rib dyed air layer structure and point double rib dyed structure. These structures give it the advantages of small lateral expansion, good dimensional stability, large thickness and straight scraping. Specifically, it is divided into two types of pattern structures: Swiss and French. The Swiss structure is tight and has low extensibility, while the French structure has clear longitudinal lines and a full surface, and the width is also wider. Double rib dyed knitted fabric is commonly seen in the collars and cuffs of T-shirts. As a fabric with good elasticity and good shrinkage effect, it is also commonly used in the production of socks. This product uses a blended fabric of 95% rayon and 5% spandex. The cloth weighs 210g per square meter and has a width of 165cm. It is soft and elastic, suitable for making sweatshirts, pants and other clothing. The only thing to note is that double rib dyed fabrics made of chemical fiber are prone to pilling after washing, but the pilling phenomenon will be alleviated as the use time increases.