Matrix Brass Off Neutralization Mask – 6.8oz is an intense toning treatment designed for brunettes who lighten their hair. This rich, blue-pigmented mask deeply deposits cool tones to neutralize brassiness while delivering hydration and repair. Perfect for color-treated brown or dark blonde hair, it leaves strands smoother, softer, and visibly cooler in tone. Use weekly for maximum neutralization and salon-fresh results at home.