About 20% smaller than the MK25 EVO but benefitting from the same core technology, the MK21 features a modern, cutting-edge design whose size and weight make it an excellent choice for travel divers. Its versatile port layout can also be very useful for technical diving.

AIR-BALANCED FLOW-THROUGH PISTON DESIGN
Provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.

EXTERNAL FINS
Unique thermal exchange design with external fins optimizes freezing resistance.

OPTIONAL 5TH PORT CAP
Increases routing configurations with four angled low pressure ports plus a fifth centralized
high-flow low pressure port, ideal for technical diving.