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2.6 PUTTING YOUR MASK ON IN COLD WEATHER.<br />

WARNING<br />

In cold weather do not clear mask by exhaling a large<br />

volume of air. Moist air will frost eyelenses and impair<br />

vision.<br />

NOTE<br />

When wearing a mask in cold weather, you will probably<br />

feel increased resistance to your breathing.<br />

a. Perform the procedures for putting on your mask (para 2.5), keeping in mind the<br />

following points in cold weather:<br />

b. Exhale slowly and lightly. If you feel excessive resistance when exhaling, the outlet<br />

valve may be sticking.<br />

2-46

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