Cotton, Rayon, Hemp, Silk, Lycra, Linen & More! They all dye well. Technically, non-optic whitened fabric dyes better (however, we find it hard to see the difference). For processes like tie-dye and batik, some folks prefer optical or at least well bleached fabric so it is as white as possible in areas with no dye. Buy it by the yard, in small bolts, or full size bolts. The more you buy, the cheaper it gets. Sample swatches are available for all our fabrics!