What does "porosity" refer to in hair care?

Porosity in hair care specifically refers to the hair's ability to absorb moisture. It indicates how well the hair can take in and retain moisture from products or environmental factors. Hair porosity is determined by the condition of the cuticle, the outermost layer of the hair, which can vary in tightness and thickness. High porosity hair has gaps and holes in the cuticle, allowing moisture to enter easily but also making it prone to losing moisture quickly. In contrast, low porosity hair has a tightly packed cuticle that can make it more resistant to absorbing moisture.

Understanding porosity is vital for hair care because it influences the choice of products and routines that will be most effective for maintaining healthy hair. For instance, high porosity hair may benefit from heavier moisturizers, while low porosity hair might do better with lighter products that can penetrate easily. By recognizing the porosity level, hairdressers and individuals can tailor their hair care techniques, ensuring that the hair remains hydrated and healthy.