The brilliant Kérastase Extensioniste Bain shampoo strengthens hair at the root, from the inside out, using powerful amino acids & ceramides to improve elasticity. Rebuild the hair's internal structure & create resitance to issues such as breaking., whilst maintaining a healthy shine. Leave the scalp & hair looking fresh, clean & strong. Suitable for brittle/weak hair Directions: Apply to wet hair, massage & rinse.