I think it stopped gas getting in the mask...
It is a modified Russian GP-7V gas mask. In the movie, the intake hose and exhale piece have been switched. Normally, air is taken in through the side of the mask. In the movie, the breathing tube attaches to the bottom of the mask.
Gas mask was created in 1914.
A person wearing a gas mask.
A gas mask is used to filter out toxic agents in the air.
M65 Gas Mask.
The main part of the gas mask is made out of rubber.
A gas mask
a gas mask box is a brownmedium sized box which contained a gas mask and a few other things
its a mask made for ariabians
They use the military varient of the Gp7 gas mask.
It's just called a gas mask.
No they don't, Gas Mask filters are designed not to go bad despite if the lid is unscrewed off, unscrewing the lid of a gas mask filter doesn't have any effect on the gas mask or it's filters.