Aqualung Air Dry Purge Snorkel is a bendable snorkel with a large diameter tube, has a purge reservoir with 2 valves, and is very flexible and durable thanks to the flexothane. Attaching the snorkel to a mask is quick and simple. Additionally, the Aqualung Snorkel has a comfortable silicone mouthpiece, a spray-proof end to limit the entry of water in the snorkel, and is overall an exceptional product.