Kérastase Bain Thérapiste & Kérastase Masque Thérapiste Duo deeply restores nourishment and strength to very damaged, over-processed hair. Kérastase Bain Thérapiste & Kérastase Masque Thérapiste Duo includes: Kérastase Bain Thérapiste 250ml Kérastase Masque Thérapiste 200ml Erosion Levels 3-4. Key Ingredients: FIBRA-KAP™ (Keratin Associated Proteins) - KAP make up 50-60% of hair's structure. When hair is damaged, these proteins are lost. Fibra-KAP is a powerful complex to restore missing proteins and restore strength to hair fibre Sève de Résurrection - The resurrection plant that can survive extreme conditions (of dryness and dehydration) and has the capability to resurrect itself after 10 years of near death