The Sleek Dry Snorkel is available in Diver and Snorkeler versions. The Diver version has a drop away mouthpiece which keep the snorkel out of the way when you switch to your regulator. The Snorkeler version has a rigid flex tube which keeps the mouthpiece in place which reduces jaw fatigue. Both snorkels feature a dry top which keeps water out when the snorkel is submerged. The bottom purge makes it very easy to clear the snorkel of any water that may find it's way in.