Smoothproof Conditioner - Biolage SmoothProof Conditioner for frizzy hair provides humidity control and anti-frizz smoothness while providing static control. It detangles, de-frizzes and defends against humidity to keep hair manageably smooth. Benefits Detangles and defrizzes hair Provides static control Defends against humidity to keep your hair manageable and smooth Paraben Free Suitable for color-treated hair Clinical Results Perfectly smooth hair for up to 72 hours* *When using the system of SmoothProof shampoo, conditioner and serum vs. a non-conditioning shampoo - Smoothproof Conditioner