Kerastase Genesis Bain Hydra Fortifiant 3 x 80ml - Travel Size - New. Kérastase Genesis Bain Nutri-Fortifiant Shampoo is a nourishing shampoo meticulously crafted to strengthen and fortify hair while providing an effective cleanse. This gentle formula hydrates both the scalp and hair, delivering deep nourishment that makes detangling knots effortless. Enriched with a rich blend of moisturizing ingredients, this shampoo promotes healthier and stronger hair, allowing you to rely on Kérastase's renowned quality and effectiveness for all your hair care needs.