Young Brunette Girl Reveals In A Blue Wool Hat, Scarf And Panties Outside In The Winter

Wool has several qualities that distinguish it from hair or fur: it is crimped, it is elastic, and it grows in staples (clusters). In the U.S. the term wool is usually restricted to describing the fibrous protein derived from the specialized skin cells called follicles in sheep, although in the U.K. it may be used of any long curling fiber such as wood wool, wire wool etc.
Characteristics
Wool's scaling and crimp make it easier to spin the fleece by helping the individual fibers attach to each other, so they stay together. Because of the crimp, wool fabrics have a greater bulk than other textiles, and retain air, which causes the product to retain heat. Insulation also works both ways; Bedouins and Tuaregs use wool clothes to keep heat out.