DevonDiver
N/A
I find that by taking longer with my exhalation I REALLY feel relaxed. In the past year my SAC rate has dramatically improved from just using that one tip.
'Just that one tip'...plus all the diving you did, which improved your buoyancy, trim and propulsion skills...resulting in less water resistance, more efficient finning...and less exterion on dives.... further leading to less air used on dives.