The balanced diaphragm MK11 delivers effortless airflow unaffected by depth, tank pressure or breathing rate.

• Lightweight S270 casing, made of a fiberglass-reinforced nylon core and a special PU outer layer, is extremely durable plus helps reduce jaw fatigue and improves diving comfort

• Technopolymer plastic barrel with a metal thread and a balanced valve helps save weight and provides a surface that ice crystals can't grab onto when diving in extreme cold water.

• Air-balanced valve smooths out the inhalation effort when diving at varying depths and supply pressures.

• Dive/predive switch is easy to use even wearing thick gloves.

• Compact and efficient exhaust tee minimizes exhalation effort

• Air-balanced diaphragm first stage design delivers constant and effortless airflow unaffected by depth, tank pressure, or breathing rate