Bonsai is an incredible blend of bamboo and nylon. Bonsai from Berroco is crafted of bamboo fiber woven into a narrow (1/8" wide) strand wrapped with a delicate nylon band for the tree striations. The result is an eco-friendly creation from a readily renewable fiber with wonderful drape & a touch of high sheen & glimmer. It's ideal for all your lightweight knitting & crochet projects.