There are many reasons for the quality of bai: the quality of du raw materials, the performance of manufacturing equipment, craftsmanship, etc. Generally speaking, what you pay for is also feasible here.

For example, the finished product made by the same cloth for an unreasonable tailor can be very different. As for 600D, chemical fiber (polyester, nylon, etc.) fabrics are usually represented by D. Denier represents the quality of fibers, yarns or other fabric threads per 9000 meters, and the unit of quality is grams, as we often say 100D means that the weight of 9000 meters of yarn is 100 grams.

Yarns of various specifications can be woven, 600D, 800D, 1200D, just common yarn count specifications. Cotton (canvas, plain cloth, gauze, etc.) fabrics are usually represented by S, and British S is the commonly used 10S, 21S, etc. Grade or level?