HERBUL Henna hair dyes are Henna-based powder hair dyes that are packed in powder form and are ready to be used with just the addition of water. The advantage of using HERBUL Henna hair dyes to dye your hair rather than any other 100% chemical-based hair color is that HERBUL Henna's main ingredient is Natural Henna Powder which accounts for more than 80% of the total contents w/w.