Kérastase Masque Chroma Filler is una A deep-nourishing mask enriched with amino acids and centella asiatica extract that effectively works on all types of porous, sensitive, or color-damaged hair. It penetrates deep into the hair's core, effectively filling porous areas and adding shine. The mask reduces the porosity of the hair fiber, extending the life of the color. This advanced technology protects against the harmful effects of hard water during washing.