@lapis I know it's not itchy at all and it's not really warm, it's a good "breathable" summer yarn. I found a link on felting bamboo http://windrosefiberstudio.blogspot.com/2008/10/can-you-felt-bamboo-and-soy-silk.html - needle felting works on the fibre but I'm pretty sure your cotton/bamboo mix won't felt in the washing machine