Yea I'm after one without a hood, Neck entry only.
Want to try the whole breathe in vacuum from a pipe through the neck opening. In through the mouth out of the nose, stick tongue in pipe to hold seal.
When I want to release I just let go and it will slowly draw air back in or I can reverse the process.
Want to try the whole breathe in vacuum from a pipe through the neck opening. In through the mouth out of the nose, stick tongue in pipe to hold seal.
When I want to release I just let go and it will slowly draw air back in or I can reverse the process.