what is the difference between a wet and dry snorkel?
Dry snorkels have a float valve mechanism that seals the snorkel tube from water when submerged. In contrast, a classic wet snorkel has a much simpler design. In its most minimal form, a wet snorkel is only a silicone mouthpiece solidly attached to a J-shaped tube. ... dry snorkel is the semi-dry snorkel.