This complete, easy-to-use kit, demystifies the ancient art of indigo dyeing. Indigo is a natural, plant-based dye traditionally used to create resist patterns on fabric by many cultures around the world. Today it continues to be popular for dyeing denim. The kit dyes more than 15 yards (5 lbs.) of fabric or 15 t-shirts. The reusable dye bath lasts for several weeks.