LIKE THE OLD SAYING GOES, ITS BETTER TO HAVE IT AND NOT NEED IT, THEN TO NEED IT AND NOT HAVE IT!!-GUN’S CONDOMS OR AIR,,, THE THREE MOST IMPORTANT THINGS THAT COME TO MIND!! - I NEVER DIVE WITHOUT A SUIT,ON BOTH ACCOUNTS, I ALWAYS CARRY MY 30 PONY AND MY SPARE AIR WHENEVER I DIVE, I AM A FORMER SMOKER, MY LUNGS NEED AIR WITHIN ONE MINUTE, I TRYED TO FREE DIVE TO 14FT TO GET A MOARING BALL AND COULD NOT DO IT!!-I HAVE COME UP FROM 125FT ON A SMALL SPARE AIR BUT COULD NOT HAVE DONE SO WITH A DECO STOP..PLEASE,PLEASE,PLEASE,,GET ONE!!!