86% kid mohair and 14% nylon.

From their website:
Brushed Although not from our own animals, this high quality brushed kid mohair (86% kid mohair and 14% nylon) is hand-dyed on the farm. At 125 yards to the ounce, it is beautiful knitted alone for a delicate scarf or shawl or with a strand of our 50/50 mohair/wool yarn for a softness and color effect that will make your project a work of art