The air buddy is the perfect octopus for cave diving

air buddy in cave

The Air Buddy,air buddy mounted on the end of a long low pressure hose dragging behind a cave diver gives the following diver a quick source of emergency air.

This just won't work using a 2nd stage regulator.  The Air Buddy is soft and the same diameter as the hose   It cannot get caught on rocks, coral or other debris as it follows the diver.

And just as important, it cannot get filled with sand, mud or other dirt the way a 2nd stage regulator can do.  It does not need to be cleared before breathing.  Just put it in your mouth and you're ready to inhale. It does not have to be turned to any special position to work as does a 2nd stage regulator.