Kérastase Chroma Absolu Nourishing Shampoo & Conditioner Duo for coloured hair includes the Chroma Respect Nourishing Protective Shampoo for medium to thick coloured hair and the Chroma Anti-Porosity Strengthening Conditioner for fine to medium coloured hair, designed to cleanse, nourish, and protect your coloured hair while maintaining the colour's vibrancy.