CONTRAINDICATIONS:
People with breathing difficulties are not allowed to use the masks.
PRECAUTIONS:
1. This mask is not for medical use.
2. Single use only.
3. Do not touch the inside of mask while wearing the mask.
4. When the respiratory resistance of the mask is obviously increased, or it becomes dirty or damaged, the mask should be replaced immediately.
STORAGE:
Humidity<80%, No aggressive gas, room with good ventilation