A one-of-a-kind ritual is what Kerastase offers you with the Resistance line, designed to bring life back to very damaged and severely weakened hair fibers. Soin Premier Therapiste 200 ml is the product in the range created in the brand's laboratories as a treatment to be used before shampooing. It is designed to ensure high protection for the fiber before proceeding with cleansing. Soin Premier Therapiste envelops the hair in a true protective sheath thanks to its extremely delicate, soft, and velvety texture. Thus begins the reconstruction process for damaged and overly thin hair. Chemical or thermal agents, or even the passage of time, end up thinning the hair fiber, which loses vitality and thickness. This specific pre-shampoo treatment defends, repairs, and prevents hair from being weighed down, providing an immediate sensation of softness and lightness throughout the hair.