Wool and cotton blends for the high-end apparel sector

Branded blends of wool and cotton for high-end apparel fabrics were established in Britain and later exported to many English-speaking countries during the 19th century (e.g. woven fabrics Viyella™, 55% wool, 45% cotton; Clydella™, 81% cotton, 19% wool). During the late 20th century, cotton and wool blend yarns for high-end apparel applications were developed in Australia (Colana®, 70% cotton, 30% wool). None of these branded blends of wool and cotton has a current market presence, yet there is evidence of relevance and interest in such blends for the high-end apparel market. How can we account for this disappearance and for the renewed interest?