Naturals:
Icelandic wool - long , soft - weight can vary
Tibetan - very soft /usually curly but not that long- 1-4 inches normally and lighter in weight
Mohair - finer than icelandic, not so much under coat and usually shorter- very soft as well
Sheep Wool - many of the the trolls produced in New Zealand use this hair- shorter, coarser and curlier - looks great for the boy trolls
Hemp - the Arensbak trolls use this natural fiber for the hair/body- very straw like but softer
Man Made:
Acrylic - typically coarser than than natural, not as long- 3 inches about the max
Nylon - these are long , thicker individual strands
Saran - this was an early troll hair used on the Marx trolls- flatter strands , not very long, tend to be brittle
Polyester - there are a few type of Japan trolls that use this hair- soft, no backing, tends to be wavy
Coarse Polyester - some of the Wishniks used this hair- very long, very coarse- like a brillo pad, no backing and simply one end glued to the scalp. Does not hold up or brush well.