The Imprex Hyperdry Snorkel has a Special Angled Chamber at the Top of the Snorkel that is Off-Set from the Main Barrel. This unique Chamber helps prevent Water from Entering the Main Barrel while you"re Snorkeling by simply Deflecting Incoming Water. The Imprex Hyperdry Contoured Semi-Dry Snorkel Hyperdry System keeps the Main Pipe Dry by Ejecting Water through an Independent Escape Pipe. This unique design utilizes the Angle of the Snorkel Pipe and the Resilience of the Water Surface to Eject Water allowing Quick Efficient Clearing. If Water does enter the Snorkel the Large Capacity Drain Chamber with One-Way Purge Valve makes Clearing- the-Snorkel Quick and Easy. The Flex Corrugated Lower Tube is made from Crystal Silicone and Swings the Mouthpiece Out-of-the-Way, making this a great Snorkel for Scuba and the Ortho-Consciously Designed Mouthpiece is Specially Angled for a Perfect Fit in your Mouth providing Ultimate Comfort. The Snorkel comes equipped with a Snorkel Keeper for attachment to the Mask Strap, is available in Black, Cobalt Blue, Flash Yellow or Translucent and is covered by a 36 month limited warranty.