Hair takes a long time to dry because it is made up of a protein called keratin, which is not easily broken down by water. When hair is wet, the water molecules enter the hair shaft and cause it to swell. This makes the hair weaker and more prone to breakage. As the water evaporates, the hair shaft shrinks and the hair becomes stronger again.
The time it takes for hair to dry depends on a number of factors, including the length and thickness of the hair, the temperature and humidity of the environment, and the type of hair products used. Thicker, longer hair will take longer to dry than shorter, thinner hair. Hair that is exposed to high humidity will also take longer to dry than hair that is exposed to low humidity. And hair that is treated with products such as gels and mousses will take longer to dry than untreated hair.
