Perfect choice for: All color-treated hair–from blondes to brunettes, lowlights to highlights. Here’s how: Apply to dry hair as a pre-shampoo treatment for an extra boost of repair and protection. Or treat clean, damp hair to a dollop of Luster Lock, then rinse, dry, and style as usual. Perfect for fine or thick hair. The inside secret: QuadraBond Peptide Complex—stocked with deeply nourishing Manketti Oil and Argan Oils–repairs and seals hair’s outer protective layer to lock in color vibrancy. Silk, soy, and seaweed extract lend a unique “slip” to prevent damage during styling.