High porosity vs low porosity hair
Low porosity hair has tightly bound cuticles that are less permeable to moisture and products, making it difficult for them to penetrate the hair shaft. This type of hair tends to resist moisture and can appear shiny but may also feel dry if not properly cared for. High porosity hair, on the other hand, has gaps and holes in the cuticle layer, allowing moisture to enter easily but also leading to quicker loss of moisture. This hair type often absorbs products well but can become frizzy or damaged if not maintained properly.
In summary, the main difference lies in the ability to absorb and retain moisture, with low porosity hair being more resistant and high porosity hair being more absorbent but prone to dryness.