A gentle hair cleanser for fine, listless hair that helps increase volume for fuller-looking style. Oil-Free Extra Body Shampoo is a gentle hair and scalp cleanser for fine, limp hair that helps boost volume and fullness. Beautiful hair is clean hair. There is no reason for a shampoo to contain oils. Oil does not clean hair. Oils and animal by-products coat the hair with a heavy film leaving hair looking dull and lifeless.