What effect does high humidity have on hairstyles?

High humidity primarily affects hairstyles by causing frizz. When hair is exposed to moisture in the air, the cuticle (the outer layer of the hair shaft) can swell and lift, allowing humidity to enter the hair strand. This swelling disrupts the smooth surface, leading to flyaways and an overall frizzy appearance. Frizz occurs because the hair seeks to absorb moisture from the environment, which can make it look unruly and difficult to manage.

In contrast, options like increasing hair volume or creating a slick finish are not direct effects of humidity. Enhanced product longevity is also unlikely since high humidity can lead to product breakdown, making styling products less effective over time. Thus, understanding the relationship between humidity and frizz is crucial for anyone working with hair, as it helps in choosing the right products and techniques to maintain desired styles under different environmental conditions.