How can a barber identify hair that is overly porous?

Identifying hair that is overly porous involves recognizing specific characteristics related to its texture and appearance. Overly porous hair has been compromised in its cuticle layer, leading to issues such as roughness, dryness, and tangling. When hair is in this state, it typically lacks the natural shine and luster that healthy hair possesses. This results in a texture that may feel brittle or coarse to the touch. Additionally, because of the damage to the cuticle, overly porous hair will often experience difficulties in maintaining moisture, leading to significant dryness and tangles.

The other options describe hair that does not exhibit the signs of porosity. Soft and smooth hair (the first option) indicates a healthy state, while oily and heavy hair (the third option) suggests an overabundance of product or natural oils, not porosity. The last option points to hair that shows no sign of damage, which contradicts the characteristics associated with overly porous hair. Thus, the description of rough, dry hair with tangles and a lack of luster accurately defines hair that is overly porous.