Made in France | Master Breathing System (MBS) | Auto-Closure Device (ACD)
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The first inhalation underwater is the start of a new adventure. Designed and made in France, the Aqualung Leg3nd MBS combines the Venturi effect and inhalation effort adjustment into one natural, intuitive control. Aqualung’s Master Breathing System allows divers to fine-tune both parameters simultaneously with a single turn, delivering smooth, effortless air delivery across all depths and temperatures.
Master Breathing System (MBS) Technology
- Single-Rotation Control: Adjust both Venturi assist and cracking effort in one fluid movement, eliminating the need to adjust two separate knobs.
- Auto-Closure Device (ACD): Automatically seals the first stage inlet when removed from the cylinder valve, keeping water and debris out of the internal mechanism.
- Environmentally Sealed Dry Chamber: Protects internal components from freezing, silt, and saltwater contamination for ultimate cold-water durability.
- Over-Balanced Diaphragm: Progressively increases working pressure as you dive deeper to compensate for dense ambient gas pressure.
Technical Specifications
| First Stage Type | Over-balanced Diaphragm with ACD |
| Control System | Master Breathing System (MBS combined Venturi & effort) |
| Environmental Protection | Dry Chamber Sealed (Cold-Water Approved) |
| Ports | 2 HP Ports / 4 LP Ports (angled for routing) |
| Manufacturing Origin | France |
