Multi-Mask / industrial

As the industrial revolution has happened, the industrial workers has increased in a sudden and the industrial has been highly developed. Though there were many changes, one thing didn't change much. The working environment. The working environment hasn't been developed much. in common there are fires at the construction sites in many ways, and that fire makes the workers get harmed. But what if the equipment they takes to work get developed and changed? I guarantee that this mask can perfectly decrease accidents at construction sites. Because this mask is designed in the basic way of blocking the harmful gas.