Bittman most often weaves with mercerized cotton yarn. “I’ll get the fattest yarn available because it will give me the biggest line. And then I might weave in other yarns too but that particular yarn works really well, weaves really quickly, it’s moderately priced, and it absorbs paint well. Cotton and linen work well. More synthetic yarns or wool or animal fibers don’t work so nicely for water based painting.”