Fiber Architecte is the first reparative dual-serum that targets the highest level of hair erosion and fill the gaps in the fiber. Reconstructs hair intensifying strength from roots to ends. Use in conjunction with any Kérastase Thermique for long lasting results. Repairs and seals split ends. Delivers long lasting styling results. Gives a non-greasy, fresh haircut feel. Smoothes the surface and adds shine.