What does the term "porosity" refer to in hair care?

Porosity in hair care is a critical concept that refers to the hair's ability to absorb moisture. It helps to determine how well the hair can retain moisture and other products, which is essential for maintaining healthy hair. Hair with high porosity typically absorbs moisture quickly but may also lose it just as fast, often requiring more frequent conditioning. Conversely, low porosity hair may resist moisture absorption and require products that can penetrate the hair shaft.

Understanding porosity is vital for choosing the right hair care products and treatments that enhance moisture retention and overall hair health. Textures, colors, and thickness are related to the visual and tactile aspects of the hair, but they do not affect its capacity to absorb or retain moisture, which is what makes porosity such a significant factor in hair care.