Kérastase Resistance Soin Premier Therapiste is a targeted treatment designed to revitalize and strengthen very damaged or over-processed hair. This pre-shampoo treatment works to rebuild the hair fiber from within, preparing it for subsequent cleansing. Formulated with a unique blend of ingredients, it helps to restore hair's strength, elasticity, and overall health. Ideal for use before shampooing, it creates a protective shield, minimizing friction and damage during cleansing. Regular use can lead to visibly smoother, softer, and more resilient hair.