Wool have long been used for their warmth and natural properties and sheep have been cultivated to provide a variety of useful wools to the crafter. Some of these are becoming very popular ... Blue Faced Leicester, Corriedale and Polworth are all coming to the fore to join Merino as great fibres to craft with. Many different finishes and processes have been applied to wool, some of which change the properties of the fibre.  Green Tea Yarns specialises in non superwash yarns and ethically processed fibres for crafting.