This is a loose knit bulky weight one-size-fits-all hat designed to cover the ears.  It's a bit smaller than some of the others, so probably won't be big enough to fit an extra large size.  The variegated multicolor bottom section is a blend of wool and silk. The yellow/purple section above that is hand painted Corriedale wool.  The purple and gold are also Corriedale.  The variegated green is natural color gray wool spun together with hand painted green wool.