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+--- Thread: Why does P30i/N30i have elbow vents? (/Thread-Why-does-P30i-N30i-have-elbow-vents)
Why does P30i/N30i have elbow vents? - b.e.wilson - 05-15-2020
Why are there vents on the elbow at the top of my head? Why not more vents where they are needed, by my nose? Odd.
RE: Why does P30i/N30i have elbow vents? - Gideon - 05-15-2020
to cut noise and direct the vented air away from your partner.
the vents are needed to prevent rebreathing CO2