Kerastase Blond Masque ULra-Violet 200mlIdeal for lightened, highlighted cool blonde hair in need of neutralisation, this rich purple mask removes unwanted yellow undertones and brassiness, while deeply hydrating and restoring hair strands. The formula soothes hair, protecting it from daily oxidation and pollution particles. This non staining hair mask can be used once a week, or as often as needed to neutralise brassy tones and keep your blonde hair luminous & cool. *Allergy alert test