L’Oréal Professionnel Serioxyl Thining Hair, 150 ml, Hair Conditioners for Women, The L’Oréal Professionnel Serioxyl conditioner makes your hair easy to detangle and nourishes it, something all healthy, beautiful hair needs. Characteristics: protects against negative environmental effects protects hair against damage seals the hair’s surface, making it more resilient gives hair elasticity and volume How to use: Apply after first washing with shampoo. Leave to act for a while, then rinse thoroughly.