Amika Bust Your Brass Toning + Strength Repair Mask – 8oz is a rich, ultra-violet treatment that tones and strengthens blonde, silver, and gray hair in one step. Packed with bond cure technology, plant-based proteins, and deeply hydrating butters, it neutralizes brassiness while restoring softness and elasticity. Perfect for lightened or color-treated hair, it delivers salon-fresh cool tones and intense repair — all in a single mask.