Figure 6-6.-MCU-2/P mask and accessories.Mask accessories (fig. 6-6) include a carrier,outserts, a waterproofing bag, and a faceform.SELECTION OF MASK SIZE. — T heMCU-2/P mask comes in three sizes: small,medium, and large. Correct selection of theproper mask size is essential for maximumprotection. A face length measurement using aspecial caliper is made before the mask is issued.MASK ADJUSTMENT AND PREPARA-TION. —A correctly adjusted mask is necessaryfor a proper fit that will prevent leaks and be ascomfortable as possible. To adjust the mask andprepare it for use (upon issue), you should usethe following procedures:1. Remove one canister from the shippingcontainer and screw it onto the facepiece.6-142.3.4.5.6.7.Loosen the straps of the head harness. Besure the strap end tabs are about 1 inchfrom the buckles.Remove the outsert, if mounted.Pull the head harness over the front of themask.Hold the outlet valve assembly in the palmof one hand. Using the free hand, push anyforehead hair aside or back. Place the maskagainst the face, forcing the chin cup verytightly against the chin. Pull the headharness over the head using the quick-dontab.Using a circular massaging motion, pushthe mask as high on the face as possible.Ensure that the mask is centered. Hold inthis position with one hand while tighteningthe temple straps.Ensure that the head pad is centered at thehigh point of the rear of the head.
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