Hair Biology Deep Hydration Mask deeply hydrates to bring back shine and moisture to dry, dull, or brittle hair. It also helps protect color against fade-out to keep hair vibrant. Made with biotin and free of parabens, this Soft & Hydrated Collection works great for dull, dry, or damaged hair and is safe for color-treated hair. Discover the complete line of age-inspiring hair care products from Hair Biology and fall in love with your hair again.