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This is due to wool characteristics that also serve to make it the most unique, completely natural and multipurpose fiber available.1  Sheep wool has the capability to keep the body at at even temperature because it does not trap heat, it insulates instead. Felting is the nature of most animal fur that allows it to entangle and form mats of fabric. 2  The fibers (strands) can interlock with each other due to ridges on the individual fibers. 3  Sheep wool is highly regarded for its ability to felt and form fabrics that are near impossible to tear.
Wool: The wool fibers comes from the skin of sheep and are relatively coarse fibers. Two striking characteristics of wool are its susceptibility to heat and its felting property, which is caused by the scales on the surface. Depending upon the breed of sheep, the appearance of the wool varies.ohair yarn is warm as wool, but much lighter in weight; it is durable, dyes well and does not felt easily. Mohair fibers have also a distinctive luster created by the way they reflect light. Despite being a hard fiber, mohair is usually spun into a very fluffy yarn, resulting in airy and lustrous garments.