Ideal for lightened, highlighted cool blonde hair in need of neutralisation, Kérastase Blond Absolu Masque Ultra-Violet 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 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. Key features: - Neutralises brassy & yellow undertones. - Ultra-nourishing formula. - Illuminate cool blondes for even brightness. - Restores shine and softness. Refresh and restore blonde hair with the Kérastase Blond Absolu Masque Ultra Violet Treatment, a weekly hair mask for lightened and highlighted locks. The purple formula helps to banish brassy and yellow tones while protecting against dullness caused by pollution and other environmental aggressors.Hyaluronic Acid and Edelweiss Flower combine to deliver high levels of soothing moisture, rebuilding weak hair fibres and infusing strands with a healthy, salon-worthy gloss.