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3 Before Use
• Hand wash the entire mask (see Mask Care section).
• Inspect the entire mask. Discard and replace any damaged or worn parts.
4 Achieving the Right Fit
Cushion Sizing
Five cushion sizes (XS, S, M, L, MW) are available. Place the
cushion sizing gauge under your nose (as shown). For the
best performance, use the smallest cushion that fits your
nose.
1. Hold the gauge horizontally under your nose and select
the cushion size based on where the outer edge of your
nostrils and tip of your nose contact the gauge. A mirror or
another person may assist with the sizing.
2. The cushion opening will be directly under your nostrils.
The cushion will hug your nose and leak will be minimal.
3. At no time should your nose be inside the cushion opening. If any part of the cushion
overlaps your nose, you are wearing the cushion incorrectly. You may need a different
cushion size.
Contact your healthcare provider for additional information.
Putting on the Mask
The right and left sides of the headgear fabric are marked with an "L" and an "R." Before
putting on the mask, check that the "L" and the "R" are upright and on the correct sides. b
1. Wash your face.
Caution: Do not use moisturizer/lotion on your hands or face.
2. Holding the cushion against your nose with one hand, pull the headgear straps over your
head. c
b
c
3
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