First of all, we need to understand the function of your Skin Barrier. Skin Barrier is the outermost layer of your skin that makes a good job in creating a barrier or protection from harmful bacteria, pollutants, UV Rays, Change in Temperature and other environmental irritants that your skin do not need! It is otherwise known as your Stratum Corneum, some call it as Acid Mantle, Moisture Barrier etc. Your Skin Barrier is made of dead skin cells embedded in lipids.