Biosilk Color Therapy Lock & Protect Leave-In Treatment provides protection from damaging UV rays and environmental stressors and is essential for color-treated hair. Lock & Protect is enhanced with maracuja (passion fruit seed oil) and silk to make hair stronger by helping seal the cuticle and prevent color loss. Antioxidants keep hair color vibrant and rich, protecting against color loss and fade with red tea extract. For daily protection, apply product to the ends of hair even on the days when you are not shampooing. Paraben free.