Semi-Dry Top Preventing water from entering the tube. Snorkel retainer Preventing its loss in use. Child Sized Mouthpiece Comfortable curved mouthpiece for kids. Purge Valve One-way purge valve for effortless clearing. Silicone Mouthpiece Non-toxic material; sufficiently flexible to be easily placed in the mouth. Pre-curved Connector Pre-curved Connector adds flexibility to the snorkel's mid-section, reducing jaw fatigue.Breath