What do I do…about my gas mask?

What do I do... about my Gas Mask? I never forget that one day it may save my life (and no one can say when that day may come). So I treat it with real care. I give it a look-over from time to time to make sure that the eye panel is not split or the rubber torn or punctured. And for fifteen minutes every week I wear it, to make certain that it fits properly, and to get used to breathing and moving about with it on. I am careful that the carrier in which I keep it is strong enough to protect it from knocks, and I take it with me wherever I go.