A "brush of hair" refers to a hairbrush, a grooming tool designed to style, detangle, and remove debris from human hair or animal fur. It typically consists of a handle and a head with bristles made of natural or synthetic materials.
Hairbrushes are essential for maintaining healthy and presentable hair, as they evenly distribute natural oils, remove loose strands, prevent tangles, and promote blood circulation in the scalp. A significant historical development in hairbrushes was the invention of the modern brush with rubber cushions and flexible bristles, which provided a more comfortable brushing experience and reduced hair damage.