Part 2: What is hair porosity?
Why is this so important? Knowledge of your hair porosity helps you structure your hair regimen and make correct product choices. This amazing system allows diffusion of oils and moisture into and out of the hair, as needed. Porosity is determined by how tightly the cuticle scales adhere to the surface of the hair shaft and also by how thoroughly adjacent scales overlap one another. There are three types of hair porosity that is low, medium and high porosity.