What is the definition of vellus hair?

Vellus hair is characterized as fine, soft, and downy hair that is typically light in color. This type of hair is commonly found on various parts of the body, including the face and arms, and serves to keep the skin warm and provide some level of insulation. Vellus hair differs from terminal hair, which is thicker, coarse, and often pigmented, making it important to distinguish between hair types in various contexts, such as waxing or other hair removal practices. Understanding the characteristics of vellus hair is crucial for professionals in the beauty and aesthetics industries, as it affects hair removal techniques and skin treatments.