Resistance Extentioniste is a haircare line by Kerastase specifically formulated for those with long hair prone to breakage and split ends. The products in the line are designed to strengthen and fortify the hair, promoting healthy growth and reducing breakage. The line includes a variety of shampoos, conditioners, hair masks, and leave-in treatments, all formulated with a combination of powerful ingredients like Creatine and Maleic Acid. These ingredients work together to provide deep hydration, nourishment, and protection to the hair, making it stronger and less prone to breakage. The Resistance Extentioniste line also includes a unique Scalp & Hair Serum, which promotes a healthy scalp environment and provides nutrients to the hair follicles for stronger, healthier hair growth. Overall, Resistance Extentioniste by Kerastase is a comprehensive haircare line that is designed to help those with long hair achieve strong, healthy, and beautiful hair that resists breakage and split ends.