Once you've found your desired lash look, the next step is the application. Your technician will be using a teeny-tiny, tweezer-like tool to precisely affix around 160 individual eyelashes to your eyes. They do this by adhering one silk lash onto each of your own natural lashes, one tiny lash at a time. When your natural lash sheds so does the extension that's attached to it — that's why they must be touched up every two to three weeks.