How does humidity affect hair during styling?

Humidity has a significant impact on hair during styling, particularly in terms of frizz and the overall longevity of the hairstyle. When the air is humid, water vapor in the environment can interact with the hair's structure. This interaction can cause the hair cuticle, which is the outer layer, to swell and lift, leading to a rougher surface and creating friction between strands.

As a result, the natural curl or wave pattern in the hair may become more pronounced or unruly, which contributes to the frizz that many individuals experience in humid conditions. Additionally, because the hair may not hold a style as well when it is frizzy or puffed up, the overall longevity of the hairstyle can be compromised. Styles that require sleekness or straightness may not last as long in high humidity, prompting the need for additional products or techniques to manage the frizz and help maintain the desired look.

In contrast, while some factors like shine may be affected by humidity, the primary concern for hairstyling professionals is how it compromises the overall styling process and the finish of the hair.