Shelf life of high-profile mask

Usually, the shelf life of high-profile mask is 3 years. However, if the color becomes darker, the smell becomes stronger or there is abnormal reaction during use, you should stop using it immediately and replace it with a new mask. During use, it is necessary to avoid direct sunlight or high temperature contact with the mask. After use, it should be sealed in time and stored in a cool and dry place to extend the shelf life of the mask.