Joico Smooth Cure Sulfate-Free Shampoo for Curly Frizzy Hair This sulfate-free shampoo gently cleanses while reducing frizz, leaving hair dramatically softer, smoother and more manageable. Recommended for Curly/frizzy/coarse hair. Directions For Use: Apply to wet hair. Lather. Rinse. Repeat if necessary. End Result: When used as a complete system, Smooth Cure: - Leaves hair smooth for up to 72 hours - Reduces frizz by 79% - Provides 24-hour high humidity protection