This is the magic secret to our innovative eyelash system success. We call it "The Best Pick-up Line(r) Ever!" Behaves and applies like any black (or dark brown) pen liner, and now also available in CLEAR! Apply to clean skin, freshly washed (not over eye shadow, primer or other makeup). Let dry (under 30 seconds). Press the lash band into place to form a seal across the entire lashline. You can remove and reposition as long as there is still liner enough to bond - if not, add a little liner - it just takes a second! The liner and our lashes stick to one another like vinyl window clings attach to glass - no glue, no magnets - just very cool science applied to a safe and beautiful, patented eye liner!