I bought my sparkle organza from Hobby Lobby. Comes in many colors. It is nylon, which was what was recommended at an embroidery art quilt class I attended. Nylon melts beautifuly. Polyester organza was not recommended as it melts with globs. Hard to find nylon only, but I was excited to find so many colors--sparkle and non-sparkle at HL. So far HL is the only store I can find nylon-only organza.