The exhaust pipe features a special cross-cut design to allow for quick efficient clearing. The Hyperdry system helps to keep the snorkel clear and the mouthpiece is specially angled for a perfect fit in your mouth. This snorkel hasa special internal purge channel located below the mouthpiece, which deflects exhaled air out the top of the snorkel while excess water drains through the bottom purge valve. The 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. The High Flow Purge design used on TUSA snorkels offers a covered large diameter purge valve for simple, quick clearing, reducing the amount of water remaining in the mouthpiece in an instant.