Choosing the type of mask for the exit bag

[Samovypil]

Unfortunately, I did not find information on using a mask with a bag (in the picture) in combination with the exit bag method.

This mask allows you to achieve a gas inhalation concentration of 80-90% (I plan helium).
Please tell me if this is a working method, provided there is a continuous flow of helium at a speed of 15 liters per minute?


Does this look obviously more reliable than a standard turkey bag, or is there something I didn't take into account and it won't work?

And also forgive my English, I'm from Ukraine, so I'm writing through Google Translator.

 

[limeoctave]

oxygen masks are not recommended because it can be difficult to get a good seal with them, you can read about it in the PPH, or in the Peaceful Pill/Exit International site (can't remember where exactly), there's also info about it on this forum (the search function should be available after 5 posts)

 

[Samovypil]

oxygen masks are not recommended because it can be difficult to get a good seal with them, you can read about it in the PPH, or in the Peaceful Pill/Exit International site (can't remember where exactly), there's also info about it on this forum (the search function should be available after 5 posts)

Thanks, already figured it out myself and bought the SCBA, don't reply to the thread.