OLAPLEX Nº4P Blonde Enhancer Toning Shampoo 250ml has a high concentrated formula that cleanses, tones and repairs hair. With a multipurpose action, this shampoo is the perfect addition to your washing routine if you have blonde, lightened or grey hair. In fact, its purple composition helps you to neutralize brassiness and boost brightness, simultaneously. Even more, its advanced system is able to provide personalized results depending on how long you let the formula act on your strands.