This dual-use hair treatment from Alterna Caviar Anti-Aging Infinite Color Hold is formulated to work both as a leave-in nourishing serum and an intensive color-preserving mask. It offers advanced protection for color-treated hair, helping to maintain vibrancy and shine between salon visits. The lightweight serum formulation penetrates deeply to nourish and smooth the hair shaft without weighing it down, while the mask application delivers concentrated benefits for a restorative treatment. Ideal for daily use for maintaining color integrity or weekly use for deep conditioning and revitalization.