The natural lifetime of a new product development is such that, within a few years, the advantages responsible for its success no longer command a price premium, hence the constant drive to produce new ideas, concepts and technologies to maintain market momentum. For cotton products the major developments in recent years have been the Easy Care finishes, enzyme wash-down treatments and latterly, stain resistance utilising fluorocarbon finishes, but in many product areas it is blends, which have formed the backbone of apparel product development programmes. This concept has also extended to accommodate blends of wool with cotton and, in view of the advantages in terms of aesthetics, comfort and warmth associated with such blends, it is perhaps somewhat surprising that the development of such products has not been more actively pursued.