Eyelash extensions are semi-permanent fibers that are attached to your natural eyelashes in order to make your lash fringe look longer, fuller, and darker. Individual lash extensions are applied to each of your individual natural eyelashes (one extension per natural eyelash) using a semi-permanent glue.
The material used varies from studio to studio, but lash extensions can be made of synthetic, mink, faux mink, or silk fibers. Most studios offer a variety of extension lengths, curl patterns, and tints so clients can customize their look.