Dr. Levy Switzerland Pollution Shield 5PF 30ml Used one pump, almost new. Defend + Block + Counterattack Fights against the 5 most harmful modern pollutants: Air pollution and gases Particulate matter Household chemicals Infrared rays "Blue light" emitted from electronic device screens How to use: At the end of your skincare routine, before makeup, simply apply one layer of this invisible, ultra-lightweight matte formula. Skin is instantly smoothed and imperfections are less visible. No more heavy makeup or foundation needed! If using sunscreen, apply skincare products in the following order: serum, cream, sunscreen, Pollution Shield Skin Care Finisher, and then makeup.