Hair porosity refers to how easily hair absorbs and retains moisture. It is determined by the structure of the hair cuticle, which consists of tiny overlapping scales. There are three main levels of hair porosity: Low Porosity Hair – Hair cuticles are tightly packed, making it difficult for moisture to penetrate. Medium Porosity Hair – The cuticles are slightly open, allowing ba... https://indiecurls.com/remy-human-hair-manufacturer/