The fabric is used, it is expected that the protective mask or mouth and nose. If it is dirty or not breathing, begin to feel uncomfortable, it may be due to the large amount of particulate smoke sticks should be replaced.
The fabric used is the mouth and nose masks or protective use. I started to feel dirty or uncomfortable breathing discomfort, which may be due to soot sticks and many should be replaced.
The fabrics used expected the mouth and nose or protective mask is used. If it is or becomes uncomfortable breathlessness, which may be due to soot adhering to the extreme should change new.