First stage

Air balanced diaphragm delivers constant & effortless airflow unaffected by depth, tank pressure, or breathing rate
Dry ambient pressure chamber increases freezing resistance, ensuring consistent airflow in the coldest conditions
Environmentally sealed system prevents water & pollutants from fouling the inner mechanism
Five high-flow low pressure ports on a swivel turret maximize hose routing options (same as MK25)
Double high pressure outlets

Second stage

NEW. Uniquely shaped casing carries on the D-Series heritage with the latest advances in breathing performance technology
NEW. Air-balanced Progressive Flow Control Valve is able to deliver abundant airflow with a natural smoothness comparable to breathing on the surface
NEW casing design features inner winglets that direct airflow towards the exhaust valve, creating a dramatic improvement in exhalation effort
NEW. Diaphragm is located in the lower section of the casing to take advantage of the pressure gradient in the upright position, making breathing even easier