The best way to measure your hair’s porosity level is on freshly cleaned and dried hair.
Carefully grasp a clump of your hair between your index finger and thumb, slowly slide your
fingers along the length of the strand, from the tips up toward the scalp. If you feel “bumps”
or an overall uneven texture as you proceed up the shaft, this may indicate that your cuticles
are not flat and your hair is slightly porous. The majority of individuals who have chemically
treated hair via relaxer or color may find that their strands exhibit a degree of porosity.
Hair that becomes easily wet as you begin shampooing is considered typically porous.