Hair extensions are made from a range of human and synthetic fibers. Synthetic fibers include Kanekalon and Toyokalon, and can differ from brand to brand. Synthetic hair in general is less expensive than human hair, and is available in a wide array of colors and textures, from natural to extraordinary. Human hair is available in many different grades, and is usually advertised by ethnic origin; India, China and other Asian countries are the top suppliers for 'virgin', or unprocessed hair. Eastern European countries are the source of 'Caucasian' hair.