You can wear the mask from both sides. The mask Inner/Outer-layer are completely the same, and made of the patented copper material, hence it provides dual side protection.

The raw copper material used in different production batches, may affect the mask’s color, and can vary in the range of Orange-Brown-Copper color to Salomon Pink color.

Humidity, sweat, or saliva does not reduce the mask’s performance. Even better, it does not require any special maintenance work (e.g., sterilization, washing, etc.). The mask features do not deteriorate if the mask is wet.