Aqua Lung Impulse Dry Snorkel, New 2017 Aqua Lung Impulse Dry Snorkel Aqua Lung Impulse Dry Snorkel Completely Redesigned for 2017 Dry Valve: Faces Forward, Allowing Valve to Close Quicker than Any Dry Snorkel New Barrel Shape: Makes Snorkel More Streamlined In-the-Water