4 Achieving the Right Fit
Cushion Sizing
Four cushion sizes (S, M, L, MW) are
available. Place the cushion sizing
gauge under your nose (as shown).
Tip: 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, the cushion is being worn incorrectly. A different size
cushion may be needed.
Contact your healthcare provider for additional information.
Philips Respironics System One Resistance Control
Using your mask with a Philips Respironics System One device provides optimal
comfort. The provider sets this value (X1) on your device.
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