Forum:Why is there a 3 minute limit on the masks???

I was wondering why the limit on the masks? They they have all been through the training to hold the mask for long periods but they keep having to take off the masks 4 some reason, why is that? Mashiro could hold hers for 15 hours straight away, but its seems to affect her too? Are they at 20% because they are in the real world and are still affected by the restriction, (unlikely but who knows?) because they are captain and lietenant ranking? Is it the environment? effects of the barrier? Or some other unexplained reason? Let me know if you know, or what you think? Kissmybankai 06:28, October 2, 2009 (UTC) -->