Noro Kureyon is a worsted weight 100% wool having two plies. It can be a little difficult to see, because the yarn has such a “rustic” loosely spun effect, but if you untwist it you will definitely get two plies in your hand. It’s how they get the striated effect that shows up in some dye lots (like, black and orange blurred together.) くれよん(pronounced coo-ray-oh-n) is the Japanese pronunciation of the English “crayon;” thus, the literal name of the yarn is “crayon.”