EVEN WITH THE BEST-LAID DIVE PLANS There are times you encounter conditions beyond your control. Sometimes you're caught down current, and face a long surface swim working hard all the way. Or maybe you went deeper than you planned. This highly responsive design provides a high volume of airflow with even the slightest inhalation effort, making it seem nearly effortless to breathe at any depth. • Diver adjustable inhalation effort • Patented Dynamic Adjustment automatically maintains inhalation effort throughout the dive • Adjustable Venturi Switch (A.V.S.) for simple Dive/Pre-Dive Adjustment • Stainless steel inline ball swivel reduces jaw fatigue • Patented orthodontic mouthpiece with high-density bite tabs |