Ideal for lightened, highlighted cool blonde hair in need of neutralization, this rich purple mask penetrates the fiber to remove unwanted yellow undertones and brassiness, while deeply hydrating and restoring hair strands. The powerful combination of Hyaluronic Acid and Edelweiss flower soothes hair, protecting it from daily oxidation and polution particles. This non-staining hair mask can be used once a week, or as often as needed to neutralize brassy tones and keep your blonde hair luminous & cool.