One of the big problems with curly hair is that it tends to be dry and frizzy a lot. This is due to using hair products with sulfates, surfactants that remove dirt from the hair and take away the natural oils that are responsible for nourishing it.
As many people notice their hair is rougher, they resort to common masks and conditioners, which contain silicones. The problem with silicones is that they are insoluble in water, so they need very powerful agents, such as sulfates, to eliminate them. If we try to clean them with a sulfate-free shampoo, it will not eliminate them, but rather they will accumulate and the hair will begin to look dull and dull, with "scales" or "dandruff", without this being your problem.