Unlike gluing a strip of temporary fake lashes onto your lash line, semi-permanent lashes are applied by a technician who hand-glues the extensions on top of your natural lashes. Because lash extensions do not come in a strip, they are customizable and actually look real. With proper care, they can last for a long time until they naturally fall out like your lashes usually do. Classic lashes are one extension applied to one individual natural lash using a ratio of One to One depending on the amount of natural lashes you have.