This is a medium bulky weight hat that fully covers the ears with the brim turned up.  The teal, turquopise and green are all Corriedale wool.  The variegated navy/dark green is a blend of several wools that have been hand painted in shades of dark blue and green then combed together for spinning.  The warm rusty brown is alpaca.  The dark brown is undyed Romney wool.  The black is Merino wool, and the light blue/gray accent stripes are a blend of Merino wool and tencel.  Tencel is a fiber similar to rayon that is made from wood fiber.