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.