L'Oréal Paris Elvive Bond Leave-In Serum 150ml is a protecting serum specifically indicated for damaged hair. That said, this leave-in serum aims to protect the hair from damage in order to provide it with softness and shine. For this purpose, this product features a high concentration of the revolutionary Bond Repair complex, enriched with Citric Acid, that repairs and reconstructs the hair's internal bonds thus helping to strengthen the hair fiber. To explain, the hair fiber comprises millions of internal bonds. These can be broken by aggressions such as heating devices, discolorations, or coloring procedures. Subsequently, this leads to visibly damaged hair with split ends and breakage. With this in mind, this range features this unique repairing complex to strengthen the hair fiber.