First stage AUTO CLOSURE DEVICE: The ACD keeps the inlet shut to protect internal parts from debris and corrosive water when not connected to a cylinder valve. It helps to maintain oxygen compatibility, preserve internal lubrication, and keep the inlet filter clean and dry. This extends the life of the first stage between services. PERMANENT DRY CHAMBER: Where there's no moisture, there's no ice. The Permanent Dry Chamber keeps internal parts clean and dry by isolating them from the outside environment. This enhances overall freeze resistance of the regulator when diving in cold water. DE-ICE: Deep ribs create a large heat exchange surface area, helping to prevent ice from forming on the mechanism. The overmolded cap delays ice formation over the external diaphragm. OVER-BALANCED MECHANISM: Also known as Auto-Balanced, the Over-Balanced Mechanism overcompensates the interstage pressure to reduce your breathing effort. Regardless of depth or tank pressure, it provides effortless breathing from the beginning to the end of your dive. This results in superior performance at depth. BLUE HIGH PRESSURE SEAT: It is the core of the first stage. The Blue High Pressure Seat opens and closes with every breath, forming a perfect seal with durable materials that work in all conditions and with all gasses. The working pressure of the first stage is automatically elevated to counteract the increased breathing air density. DUST CAP PROTECTION: Attached to the regulator body, the Dust Cap protects the inlet fitting and the Auto Closure Device from impacts and damage. It also seals the first stage when it's off the tank. DIN AND YOKE SCREWS: Ergonomically shaped and made of a bi-material “Soft Grip” surface, it provides a better hold when installing or removing the first stage – especially with cold hands. CHANNELED YOKE SCREW: Prevents water retention. HIGH PRESSURE/MEDIUM PRESSURE PORTS: Perfectly positioned to provide optimal hose routing. AVAILABILITY: DIN (4,350psi/300 bar max.) and YOKE (3,300psi/232 bar max.). Second stage COVER OPENING CHANNELS: The Front Cover Opening Channels allow water to flow sideways over the diaphragm. The wide radial openings prevent freeflows when diving in strong currents and reduces cracking effort by 20%. AIR CHANNEL DEFLECTOR: Streamlined bi-material component directs the air flow evenly through the 2nd stage and lowers exhalation effort. VENTURI ADJUSTMENT SWITCH: The Venturi Adjustment Switch allows divers to precisely control and adjust the air flow. In the “MIN” position, the valve's assistance is minimized, resulting in a higher inhalation effort, ideal to avoid freeflow. In the “MAX” position, the valve's assistance is maximized, resulting in a lower inhalation effort. The overmolded elastomer and ergonomically designed lever allow control of the air flow even while wearing gloves. PNEUMATICALLY BALANCED: For smooth and easy breathing at all depths. HEAT EXCHANGER: Prevent ice forming on the valve inlet. OVERMOLDED AIR PURGE: The wide Overmolded Air Purge area is easy to control and makes purging your regulator easier. OVERMOLDED EXHAUST COVER: Made of elastomer with a “soft touch” effect, the Overmolded Exhaust Cover provides protection. COMFOBITE: A patented and comfortable mouthpiece featuring a unique palate bridge reduces jaw fatigue and securely holds the second stage in place. Made from hypoallergenic silicone, the orthodontic mouthpiece is both soft and sturdy. INTERCHANGEABLE MOUTH PIECE: The detachable and reusable mouthpiece clamp allows for quick and simple tool-free change, avoiding plastic waste. REUSABLE MOUTHPIECE CLIP: Perform quick and easy mouthpiece changes using the removable, reusable clip. AQUA FLEX HOSE: Flexible and lightweight with dual protectors. When performance is your highest priority, Leg3nd is the answer. The Leg3nd shares the same breathing characteristics with the Leg3nd Elite and Leg3nd MBS. The familiar venturi switch now features an updated and ergonomic design. Overmolded with “soft touch” elastomer, the ergonomically designed switch perfectly controls the venturi effect, either allowing or containing a natural freeflow.​ Designed and made in France.