What characteristic does hair have when it is neither resistant nor overly porous?

When hair is described as having a characteristic that is neither resistant nor overly porous, it is referred to as "normal." Normal hair has a balanced structure; it retains moisture effectively without being too oily or dry. This condition indicates that the hair cuticle is intact and functioning well, allowing for a healthy appearance and texture.

In contrast, weak hair lacks strength and can be more susceptible to breakage, while damaged hair exhibits signs of wear, such as split ends or a rough texture, often due to chemical processing or environmental factors. Dull hair typically lacks shine and vibrancy, which can occur when the cuticle is improperly closed or damaged. Thus, normal hair stands out as the ideal condition where the hair's properties are balanced, allowing it to perform its functions effectively.