Which hair characteristic could indicate high porosity?

High porosity in hair refers to the ability of hair to absorb moisture quickly but also lose it just as rapidly. One of the most telling signs of high porosity is the absence of shine. This lack of shine often occurs because the cuticle layer of highly porous hair is raised or damaged, which prevents light from reflecting off the hair shaft smoothly. When the cuticles are not lying flat, it can lead to a dull appearance, indicating that the hair may be more vulnerable to environmental factors and has greater difficulty maintaining moisture.

In comparison, soft texture typically suggests a healthier hair condition, fragile strands indicate damage rather than porosity, and significant elasticity suggests that the hair is more likely to be healthy and well-balanced. Therefore, the absence of shine serves as the most direct indicator of high porosity.