From the manufacturer’s website: The 1/2NM are Scottish spun fancy mohair yarns.

The actual fibre composition is 78% mohair, 13% wool, 9% nylon.

The 1/2NM yarns are a bit lighter than our normal aran weights, quite a bit heavier than the dk weights. The yarns have a waxy feel rather than an oiled one, and should not bloom much more on washing.

General knitting properties:

http://colourmart.com/eng/knowledge_base/knitting_properties