These lashes are high quality and meant to be reusable. For a natural look or for comfort, trim lashes to match length of your eye lid. Apply clear or black lash glue to false lash line. Wait a few seconds for the lash glue to become tacky then gently press to your eyelid above your natural lashes starting from the inner corner. Wait with eyes slightly open for the lash glue to dry. Touch up eye makeup after the glue is completely dry.