A gas mask is a kind of mask that fits over the face area and nose. Protecting from poisonous gases, gasoline spills, and tear gas are just a few things a gas mask is used for. Gas masks were sent all over England. They were worn everywhere even to sleep they knew Hitler would send no warning at all. It is power gear. It was much more safe to put the gas mask on in the blitz. The Germans didn't attack with gas bombs so the gas masks were not useful. The gas masks were sent to the whole country. Gas masks have a type of material which lets good air in.