Cool fiber textiles add complex ore with slowly endothermic and fast cooling functions to give wearers a cool feeling. The hygroscopicity and perspiration design derives from heter-section structure: Via capillarity this kind of textile can rapidly absorb sweat and moisture on the surface of skin and thus bring them to the surface of the textile to evaporate. While wearing the cool fiber textiles indoors, people can lower two degrees of the air conditioner (26°~28°C) and consequently achieve the environmental purpose.