The supplier of the wool fiber is the sheep, which can also live well with the European climate. The quality varies from breed to breed, but is also dependent on the climate.
Wool yarns are divided into carded yarns and worsted yarns. While carded yarns are rather voluminous and may also contain short fibers, worsted yarns have a larger twist in addition to the longer fibers.
The elasticity of wool makes it attractive as a warp yarn not only for
beginners in weaving. Wool yarns have good heat retention even when wet and they are not susceptible to dirt. They are stained with acid dyes.
Other important animal fibers are mohair, alpaca or cashmere. They are very noble fibers, since the yield per animal is very limited. A special difference to the wool is the fineness and the crimp of the fibers.