This is what we call fibres that come from the first shearing of a sheep or lamb. They have been neither spun nor felted nor part of any other finished product, and contain no more than 0.3% of impurities.
Houndstooth
Definitely retro but never outdated, it has a two-tone cross weave. Originally from Scotland, its finest hour came in the 1950, before being elegantly restored to the heart of both men’s and women’s wear in more recent years.