What Is Hair Porosity?

When something is porous, it has the ability to readily absorb water. Non-porous substances repel water and moisture. Thus, low porosity hair has more difficulty absorbing water. Is your hair very dry? Chances are it’s also porous. Is your hair glassy and smooth? Then it’s probably not porous at all. This is because the low porosity hair strands are sealed and smooth, making the hair appear reflective and shiny.