The Full-Face Mask DiverWorking divers, such as public safety divers, use full face masks because they protect the eyes and nose from contaminants in the water, provide comfort in cold water, and allow for communication. If you're interested public safety diving, scientific diving, or venturing into extremely cold water, then learning to dive with a full face mask is definitely for you. Because full face masks allow you to breathe from your nose, they are also beneficial for