According to regulations, cosmetics must have a minimum shelf life of 30 months when unopened. In accordance with the EU Cosmetic Regulation of 2009, we indicate the shelf life after opening MUTI products using the PAO (Period After Opening) symbol. The number you find within the PAO symbol indicates the number of months your MUTI product remains usable after opening. Typically, MUTI products have a shelf life of six months after opening.