Perhaps there could be clearer distinction between sheep breeds and fine animal hairs given the growing issues with fraud and need for consumer protection US Customs and Border Protection Laboratory CBPL Methods chapter 51 indicates the distinction between fibers 51 07 Wool or Mohair 51 18 Analysis of Wool Fine or Coarse Animal Hair Horsehair Yarn and Woven Fabric Substantial confusion on the issue may be minimized by providing a summary of the following with associated fact tags Specialty wool fibers under the Wool Names section in the Wool Act states Although the specialty fibers listed above may be called simply wool they also may be identified by their specialty fiber names mohair Cashmere camel alpaca llama vicuna If the name of a specialty fiber is used the percentage of that fiber must appear on the label The Federal Trade Commission indicates There is a three percent tolerance for fiber content claims on labels No tolerance is allowed if the label states that a product contains one fiber exclusive of allowed amounts of ornamentation or decorative trim The Wool Act and Rules do not provide any tolerance for the content of wool products