The 24-hour lash boosting power system is the ultimate starter kit for visibly longer, thicker, fuller looking fringe of lashes. Transform your natural lashes by using lash boosting serum underneath mascara and overnight on bare lashes, and maximize your natural lash appearance. The L’Oreal Paris research laboratories have specially formulated lash boosting technology to maximize your natural lash appearance. How? Each lash boosting product contains: a unique pro-keratin complex of fortifying amino acids, panthenol etc.