I couldn't agree more and I would love to be able to use it underwater, however it has been suggested before.
http://forum.micdoodle8.com/index.php?threads/breath-underwater-with-oxygen-mask.2622/#post-17932
It does make perfect sense though since astronauts train underwater.
http://forum.micdoodle8.com/index.php?threads/breath-underwater-with-oxygen-mask.2622/#post-17932
It does make perfect sense though since astronauts train underwater.