The best fabrics for tie dyeing are natural fibers that absorb dyes well and retain vibrant colors. Cotton is the most commonly used fabric for tie dyeing, offering excellent dye penetration and color retention. Other suitable fabrics include rayon, hemp, and silk, as they also absorb dyes effectively and yield beautiful tie dye results. Avoid synthetic fabrics like polyester, as they may not take dyes as well and can result in less vibrant colors.