The Mares Ergo Dry Snorkel is for the Snorkeller that wants a dry comfortable dry breathe.FeaturesAnatomical designExhaust valveCorrugated hose and mouthpiece made with high quality siliconeDesigned for maximum performance both for scuba divers and snorkellers alike. From one end to the other, the ergonomic shape fits perfectly to the side of the head. Features a corrugated flex hose made using high quality silicone and a superb snorkel keeper which can be adjusted for the perfect positioning.Fast action purge valve and a top quality silicone mouthpiece. Superb dry top that actually works thanks to Exclusive engineering at Mares. The combination of the 100% dry top and an exhaust valve in the mouthpiece ensures a completely dry breathing environment.