Large bore curved snorkel. The Air Silicone valve snorkel is the outstanding snorkel for adults with dual purge valves. It features anatomically shaped and flexible snorkel tube, comfortable fit, patented, anatomically shaped Comfo-Bite silicone mouthpiece adjustable Dry Top splash guard, Quick Clip snorkel retainer or double purge valve with 2 diaphragms for easy purging. Color: Lime