The utility model discloses a yarn, yarn's the transversal platykurtic of personally submitting, including the glass fiber layer that appears admittedly, glass fiber appears bao na in place admittedlyhas cotton thread sweat absorbing layer, glass fiber appears the outer cladding in layer admittedly has silk contact layer. A yarn, thereby makes the abrasion strength that the platykurtic increasesarea of contact reinforcing yarn with its cross section to the cotton thread sweat absorbing layer of outer silk layer and inlayer can ensure that the yarn sense of touch is comfortable, and it is notnext to the shin to perspire, and design support nature is good, can the live time length later will not lose its shape own.