What term describes the ability of hair to absorb moisture?

The term that describes the ability of hair to absorb moisture is porosity. Porosity refers to the hair's ability to absorb and retain moisture, which is largely determined by the condition of the cuticle, the outermost layer of the hair strand. Hair with high porosity has gaps and holes in the cuticle layer, allowing it to absorb moisture easily but also leading to rapid moisture loss. Conversely, hair with low porosity is more resistant to moisture absorption due to a tightly bound cuticle.

Recognizing the importance of porosity helps in selecting appropriate hair care products and treatments. Properly understanding a client's hair porosity can aid in recommending specific moisturizing treatments or hydration techniques that can improve hair health and manageability. This is vital knowledge for barbers and stylists to provide personalized care for their clients.