Biolage Color Last Acidic Milk Rinse – 16.9oz is a post-color treatment designed to help seal in color, balance hair pH, and boost shine after chemical services. Enriched with oat milk and acidic technology, this lightweight rinse smooths the hair cuticle, reduces porosity, and enhances softness without weighing hair down. Ideal for color-treated hair, it helps maintain vibrancy and leaves hair feeling silky, nourished, and visibly healthier from root to tip.