Sepcial fibre - yak wool is 35 - 45 millimeters long and about 17 microns in diameter . large stocks of superior quality ， soft and smooth yakwool are good material for weaving high - grade overcoat woollen cloth 牦牛绒：牦牛绒是一特种纤维，长度35 - 45毫米之间，细度在17微米左右。质优、货源丰富、手感柔软、光滑，是制作高档大衣呢的好原料。
