This hat is made from black dyed Corriedale wool with art yarn that includes various novelty fibers, sparkly silver with clumps of unspun colored fluffy mohair and wool plied and blended in.  Some of the yarns in the lumpy sections are extra bulky weight, and the rest is medium bulky.  Soft, warm and comfy with some stretch to it for a one size fits all fit.  See more photos of this hat on the Hats & Scarves page where there is a scarf that would go nicely with it.