A shampoo. Embark on a decade of haircare evolution with 's Première – a game-changer in decalcifying and repairing. Unleash the power of Concentré Décalcifiant Ultra-Réparateur with 8% pure acids, including citric acid for deep decalcification and glycine to repair from within. Break the cycle of damage with this pre-shampoo treatment, eliminating calcium buildup and renewing hair strength.