Mares 22 Navy II First Stage Style Regulator YokeThe 22 Navy II first stage delivers dependable performance in extreme diving conditions. With high flow output and pre oriented DFC ports, it ensures smooth breathing and easy octopus setup. Equipped with a special CWD oil kit for cold water, its designed for reliability in icy dives. Tested and approved by the US Navy, it has met rigorous standards: 30 minute dives to 60 m, ventilation at 62. 5 l min, water temperatures down to 2 C, 6 minute ascents