The eyelash application can take anywhere from 2 hours to 3 hours depending on the fullness of your natural lashes. The more lashes you have the more extensions, thus for fullness! This is a meticulous process that requires patience and concentration; therefore it is important not to rush the process so the you can leave with a perfect set of lashes! You will be relaxing with your eyes closed. So many of our clients are so relaxed that they often fall asleep.