This shampoo from the Kérastase Resistance line is specifically formulated to address the needs of hair prone to breakage, especially those striving for longer lengths. It works to reinforce the hair fiber from within, helping to reduce strand breakage and support healthy hair growth. Use this product as the first step in your hair care routine to gently cleanse the scalp and hair while commencing the strengthening process. It prepares the hair to better absorb subsequent treatments for maximum efficacy.