Most of my handwovens are cotton, but I sometimes use silk, lyocell, rayon, and more rarely, wool. I generally dye with natural dyes, but occasionally use synthetic dyes. I like to weave white and then dye the fabric rather than dyeing yarn before weaving. I sometimes dye fiber before spinning it. I use my handspun in the shuttle and have developed some "tricks" to get color changes when I want them.