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.
Canvas
Canvas is different from other fabrics because it has no front or back. This is the result of a particular weaving method that alternately crosses the odd and even warp threads, to let the weft thread through.