The XS Scuba Passage Snorkel represents the latest in snorkel dry top technology. This highly efficient dry top, coupled with a self-draining lower end, results in an easy and comfortable snorkeling experience. The quick release snorkel keeper and comfy-bite removable and replaceable silicone mouthpiece just add whip cream to your snorkeling adventures! The patented dry prevents water from entering the contoured snorkel tube on the surface and when you make a surface dive it closes off the tube to keep it dry when you arrive back on the surface. The self draining one-way purge valve in the deep reservoir below the mouthpiece eliminates any water that may enter the tube. The reservoir also allows you to breathe past small amounts of residual water if present. The Comfy-Bite mouthpiece uses a unique bridge that runs behind your front teeth to hold it firmly in place. Since the mouthpiece is removable you can replace it with a smaller or standard type mouthpiece if preferred. This avoids clenching and allows you to relax your jaw for a more comfortable snorkeling experience. The lower end of the snorkel tube is a flex tube design. This flex tube allows the mouthpiece to drop out of the way when not in use, making it an excellent snorkel for scuba.