Some people often mix wool yarn from cashmere yarn. in fact they are totally different. Cashmere yarn is much more expensive and precious than wool yarn.
Cashmere come from the inner hair of cashmere goat, it need to be collected by a special comb and each gat can only produce no more than 100 gram cashmere fiber. while wool comes from the sheep which can produce several kilos wool fiber each year.
They are different in structure. If you see from microscope you can see their difference. Cashmere is thinner than wool, only 14-16 microns. cashmere scale is round while wool scale is sharp.
cashmere knitwear is 1.5 to 2 times warmer than wool knitwear. Cashmere has smoother and softer feel than wool, it can become smooth and flat after hang if it crumble. And cashmere will not shrink.
The total output of cashmere only accounts for 2% of the world total textile fiber. over sixty percent cashmere fiber is produced in China. we can say China is the world best and largest cashmere production country. Cashmere sweaters feature in soft, light and gentle and can wear next to skin.