Diving in cold water, sometimes the biggest challenge is the initial putting your face into the water and getting that rush of adrenaline when the cold water hits your face. By doing your PADI Full Face Mask Course, you will be qualified to use a Full Face Mask, which eliminates the initial cold face!
This speciality is extremely useful for working divers, such as public safety divers, provides comfort for cold water diving, and allow for communication. Since you can breath through both your nose and your mouth, they are beneficial for people who have difficulty using standard scuba masks. Since it covers you entire face, it also helps eliminate jaw fatigue from having the regulator in your mouth!
To qualify as a Full Face Mask Diver you must be at least 15 years old and have your PADI Open Water Certification or equivalent.