LatitudeAdjustment - 5/22/2018 8:52 AM
They don’t show it being used with scuba. If you have ever been anchored to the bottom or on an anchor rode in a strong current you may have found it hard to breathe. If this is as fast as they say that might be a problem.

Might be useful on some of those long swims out to a shore dive, could even be your SMB as long as the carry down the beach isn’t too long.