Kérastase Première Decalcifying & Repairing Hair Shampoo is an advanced Decalcifying & Repairing Hair Shampoo tailored for all types of over-processed or damaged hair. This professional-grade, sulfate-free Decalcifying & Repairing Hair Shampoo provides a gentle yet effective cleanse for the scalp and hair, targeting the removal of excess calcium that can further compromise treated hair.