The first inhalation under water is the start of a new adventure. The revolutionary combination of Venturi effect and inhalation effort adjustment is natural and intuitive. Aqualung's Master Breathing System allows divers to control both in one simple rotation. All depths, all conditions, all dives - MBS will adapt.

When the first stage is not connected to a cylinder valve, the Auto Closure Device (ACD) keeps the inlet shut to protect the first stage internal parts from contamination and corrosive water.
• Preserves the internal lubrication
• Keeps the inlet filter clean and dry
• Safer for elevated percentages of oxygen

New front cover opening channels allow water to flow sideways over the diaphragm
• Radial openings to prevent freeflows when diving in stronger currents
• Openings widened to reduce peak inspiratory flow by an impressive 20%