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TM 3-4240-280-10

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2-9. CHECKING THE FIT OF YOUR FACEPIECE.<br />

NOTE<br />

Although a qualified person has supervised the initial fitting of your mask, it is your<br />

responsibility to be sure you have the right size mask and that your mask fits properly<br />

Check the following items to ensure a proper fit:<br />

a. Top and side edges of facepiece (1 ) should come well up on your forehead and<br />

within 1 inch (2.5 cm) of your ear.<br />

b. The pupils of your eyes should be about 1 inch (2.5 cm) from top of lens (2).<br />

c. Head harness cheek and temple straps (3) should not cut into ears.<br />

d. The bottom of facepiece (4) should not cut into your throat.<br />

2-70

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