- Moisturizes and smoothes curls without weight while reducing frizz. Creates a base for perfect curls. It also is humidity resistant. Made with AHA structure complex: Lactic Acid – supports internal reconstruction, Polyquaternium-37 – evens out the hair surface, and Glycyl Glycine – improves manageability. Use on curly hair. Apply to shampooed hair, and leave in. No need to rinse.