What tool is often used for blow-drying hair?

The round brush is widely used for blow-drying hair because it serves multiple purposes that enhance the drying and styling process. When paired with a blow dryer, the round brush helps create volume and shape while drying the hair. The cylindrical design allows stylists to wrap sections of hair around the brush, promoting curl, wave, or lift as they dry. This technique not only helps in achieving a polished look but also allows for better control over the direction and amount of bend or curl in the hair.

In contrast, a comb is typically more suited for detangling or sectioning hair rather than styling it during the blow-drying process. A flat iron is designed for straightening hair and would not be used in conjunction with a blow dryer for styling. A hair clip is essential for holding sections of hair out of the way, but it does not contribute to the drying or styling process directly. Thus, the round brush stands out as the most effective tool for blow-drying hair while providing styling benefits.