Eight Liang. It takes about 8 threads to weave a women's vest with medium-thick thread, which feels almost just right and will be more comfortable to wear. Body-shaping vest needs 8 ounces of fine wool. Fine wool refers to the strand density of 167~398 tex. This kind of wool is smooth, soft to the touch and beautiful in color. Mainly used for knitting thin sweaters, light and fit, used in spring and autumn, with less wool consumption.