How does a Dry Top Snorkel work? Can you breathe underwater?
Every time you go under water, the ball float rises and stops water from coming into the snorkel and into your mouth.
You can't breathe once the end of the snorkel is completely submerged. You need to take a breath and hold it as you go under. The Dry Top system means you don't need to blow water out of the snorkel when you come back up. You just breathe normally again once you're floating back on the surface.
If water does enter the snorkel, it drains out through a valve located in the chin area, as soon as you raise this above water level.