Kérastase Resistance Therapiste Masque is an intensive treatment for extremely damaged or over-processed hair. This luxurious, buttery yet feather-light moisturising masque penetrates hair to the core to strengthen, smooth and protect, leaving hair noticeably smoother, shinier and healthier-looking . The key ingredients in Kérastase\'s deep-nourishing masque are FIBRA-KAP™ and Sève de Résurrection. Designed for very damaged hair experiencing erosion levels of 3-4, this rich, creamy formula is infused with 6 amino acids and a wheat protein hydrolat that work hard to replenish and rejuvenate the hair\'s natural protein complexes. With this advanced formula, your hair is nourished from within, restoring strength, elasticity and vitality without weighing it down. Apply this hydrating hair masque as an additional stage at the end of your regular hair-cleansing routine if your tresses are feeling particularly thirsty. Work a generous amount into washed, towel-dried hair and massage into the scalp and throughout the lengths. Leave for 5–10 minutes, then emulsify and rinse thoroughly. The results are deeply nourished, moisturised hair that\'s protected from further breakage or split ends.