Hair is a protein filament that grows from follicles found in the dermis . Hair is one of the defining characteristics of mammals . The human body, apart from areas of glabrous skin , is covered in follicles which produce thick terminal and fine vellus hair . Most common interest in hair is focused on hair growth , hair types, and hair care , but hair is also an important biomaterial primarily composed of protein, notably alpha-keratin .
Locks of Love is a public non-profit organization that provides hairpieces to financially disadvantaged children under age 21 suffering from long-term medical hair loss from any diagnosis.