This lightweight regulator has a strong reputation for reliability by setting a number of diving records, such as the deep-solo-dive to 313m. and 101 divers breathing simultaneously for 40 minutes from a single MR22 first stage.Fluid Dynamic Deflector: Receives and properly directs the airflow from the bypass tube to the mouthpieceMesh Grid: Patented design that reduces the impact of water flow onto the second stage diaphragm, thus eliminating free flows even in strong currentsSuperflux Hose: Lightweight and soft for pliable movementUltralight Techno Polymer: Abrasion resistant and affordable, ideal for diving in warm and moderate water temperaturesVortex Assisted Design (VAD) System: The air bypass tube sends air to the mouthpiece creating a swirling vortex with a low pressure area in the center that keeps the diaphragm down during inhalation, for very easy breathing at all depths. In cold water diving, this system prevents ice crystals (which can be generated by the expansion of humid air in cold temperatures) from interfering with the proper operation of second stage components.The Tri Material Valve: Made of a central valve in nickel-plated brass; a highly-resistant polyurethane coating covering nearly the entire valve body to protect from wear and tear and an additional polyurethane covering to the surface (head) of the valve to provide a perfect seal, even under extreme conditions. Divers can breathe safely knowing uncontrollable free flow never occurs under any conditions.Dynamic Flow Control (DFC) System: Minimizes the pressure drop that occurs in all regulator first stages when the diver inhales. The deeper the dive, the demand from airflow from the regulator rises. The DFC system operates in relation to the diver's actual air demand, independent of depth and tank pressure. It uses the Venturi Effect, optimizing the regulator's sensitivity and minimizing inhalation resistance, especially during dives in extreme conditions.All Metal Technology: Long lasting and ideal for cold water dives. The high thermal conductivity of metal reduces the dry mouth feeling during the dive.Features:Material: MetalFirst stage: Balanced diaphragm designFirst stage weight INT: 1 11/16lb.First stage weight