Many mascaras have started adding lash-conditioning elements to their formulas. With lash-conditioning mascaras, you get the best of both worlds: a lash-growth treatment and mascara joining forces in one multitasking product. If a beauty equivalent of the dynamic duo Batman and Robin existed, the Peter Thomas Roth Lashes To Die For Mascara would be it. The mascara combines the patented Peter Thomas Roth Lashes To Die For conditioning treatment with a volumizing mascara to help create lashes so lush that people will question whether or not they are real. Apart from the lash-conditioning component, the mascara itself is amazing. The brush does an great job of separating each lash while distributing the product evenly — there's no flaking when wearing the mascara all day.