Miss Rumphius wrote:I'm a newbie. I just got my FP431 Flexifit today, from online order. DME due to bring CPAP in 2 days. I'd like to wear the mask to get used to it without the "leaf blower". Information pamphlet says don't,, due to inadequate CO2 washout. Is there a way I could temporarily modify it to let me do this, for example, remove the valves??
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