eye lash primer or if it's the work of the mascara on its own. Now the question you want to ask...is it worth $23 bucks? Probably not. I think you can do well with any mascara (as long as you use primer). Tart's primer has worked well with any mascara I've used (although I don't like Tart's mascara). But...looks like I have to get my money worth since I already brought this crap...If you are interested, shop Benefit's mascara here!