Diving Mask, Full Face 03
Diving Mask, Full Face 03 : Features: Much less risk of water leaking in past a mouthpiece: Some divers accustomed to open-circuit scuba get into a habit of casually letting small amounts of water leak in between the lips and the mouthpiece and blowing it out the next time the diver exhales. If by force of habit the diver does the same with a rebreather that has a plain mouthpiece instead of a full-face mask, that water will get into the breathing circuit