The Blacklight Neu:Blu Blonde Science Blue Neutralizing Spray is designed to neutralize unwanted brassy tones while enhancing the brightness of blonde, light brown or lightened hair. Powered by NEU technology enriched with squalane and high-purity chromophores, it helps balance tones while delivering hydration and softness. Its lightweight mist refreshes color and boosts shine without weighing hair down, leaving hair radiant and beautifully balanced. Neutralizes unwanted brassy tones Enhances brightness of blonde and light brown hair Provides hydration and softness without weight HOW TO USE Spray evenly onto clean damp or dry hair, focusing on areas where brassy tones are more visible. Do not rinse. Style as desired.