The cold fiber is a nano-scale mica added to the melt spinning, the jade powder, which is mainly a carbonate mineral; the main components are SiO2, AL2O3, etc., and further contain various metal ions such as Fe, Na, Mg, etc. The hexagonal or rhomboid plate-like and sheet-like structure itself has good thermal conductivity, and the nanometer mica surface is charged, has high hydration, and easily forms a hydrated film, so under the dual action of heat conduction and water film The fabric has a distinct cool feeling, so it is widely used in the fabric of the season.