Greasy wool straight from the farm contains high levels of naturally occurring lanolin, a useful by-product of wool. Sheep also gather soil, seeds, twigs and grass as they roam around their environment which all need to be removed from the fleece ahead of late stage manufacturing. This is done by scouring and in some cases combing the greasy wool.
To protect the environment wool is scoured using only environmentally friendly detergents and no bleach or other chemical enhancements are applied to artificially improve colour readings.