L’Oréal Professionnel Serie Expert Blondifier, 200 ml, Hair Conditioners for Women, The L’Oréal Professionnel Serie Expert conditioner makes your hair easy to detangle and nourishes it, something all healthy, beautiful hair needs. Characteristics: smooths and acts against frizz neutralises yellow undertones in your hair improves the structure of the hair makes hair colour last longer How to use: Apply after first washing with shampoo. Leave to act for a while, then rinse thoroughly.