Weaving
Long ago weaving was carried on in the homes of certain people called "weavers", and followers of this trade sold their commodities locally. The weaving of linen was carried on to provide material for shirts, sheets and dresses. Linen dresses and wool yarn were often woven together.
This mixture was used for petticoats, a finer & better quality of this mixture was also possible, and was used as a dress material considered at the time to be of a very fine texture.
This mixture of linen threads and woollen yarn was called "droguet"
In making "droguet" a very fine linen thread was needed