Naturally colored henna, I wanted to change and regain my natural dark blond ash ... I have curly hair coming down the back, and one box per application was enough. It is a product that works well, but do not expect a miracle. For my part, I am satisfied of its effectiveness, because I had read several testimonies before so I knew what to expect. Before you start, you should know several things: - It smells really bad! - The bad smell remains on more or less time depending on their nature hair - There must be a very long flushing time (and thus a lot of water) - Do not be afraid if the rinse water is clear. I expected to have an orange water (because dyed auburn) and no! The rinse water remains clear, but it works even when do not worry. - It does not too abyss hair (not as discoloration, for example), but they stand still a little fragile, so do not hesitate to care before and after. I'm happy, I was still taken quite a layer of henna, although it remains in me and that I would have a regrowth boundary.