Nature Collections Neutralizing Blue Shampoo from Eugène Perma Shampoo Bleu Neutralisant Collections Nature is the perfect choice. Its innovative, eco-friendly formula neutralizes unwanted yellow highlights while leaving hair soft, supple and shiny. In addition to bringing new shine to hair, this professional shampoo is easy to use: simply apply to damp hair, lather, leave on for 3-5 minutes and rinse for visible results. With its 300ml capacity, this shampoo will quickly become an essential part of your hair routine for healthy, radiant hair day after day.