Cashmere goat herds in Mongolia; only the downy winter undercoat is used for high quality cashmere yarn.
The highest quality fibre is classed as super white. (RIGHT)
Harvest of the cashmere fibre by combing the goats rump. (ABOVE)
Cashmere fibre is classed on the basis of its colour, diameter and length and its contrast to the coarser guard hair.