Eyelash Extensions last between 4-6 weeks, depending on your natural lash cycle and aftercare. Your own lashes shed naturally and new ones continue to grow in a replenishing cycle. We naturally shed 2 to 4 lashes from each eye in a day so the lash extensions will last as long as the cycle of your natural lash. Touch ups are recommended every 2– 3 weeks to maintain your look depending on your individual needs.