Biolage Essentials SmoothProof, 200 ml, Hair Conditioners for Women, The Biolage Essentials SmoothProof conditioner makes your hair easy to detangle and nourishes it, something all healthy, beautiful hair needs. Characteristics: smooths and acts against frizz provides the necessary hydration protects against negative environmental effects How to use: Apply after first washing with shampoo. Leave to act for a while, then rinse thoroughly.