Dyeing has never been easier than with the iDye washing machine method! The inner dye packet dissolves in water, so there aren t any messy powders to handle. iDye is for all natural fabrics. For polyester and nylon, use iDye Poly. For blended fabrics use iDye Poly with corresponding iDye natural color. iDye Poly and dark/bright iDye natural colors require the stove top method. A single iDye packet will dye 2-3 lbs/1-1.3 kg of fabric.