Fiber refers to the material that makes yarn. Fiber most frequently comes from sheep, rabbits or alpacas, however, it can also come from plants such as bamboo or cotton, or from plastics which is referred to as acrylic fiber.

Fiber is frequently spun into yarn, however, needle felting uses raw fiber before it is spun into yarn. Fiber artists will find supplies for needle felting, spinning yarn, knitting, crochet and more at Yarned and Dangerous.