The OTS Guardian Full Face Mask is comfortable and is easy to use for anyone. The low profile visor ensures great visibility. The OTS ABV valve helps preserve your air when on the surface. Set up is fast and the hose is on the right side which helps to keep your configuration clean and organized. Diving becomes effortless especially in cold water. The Guardian helps keep your face warm and being able to breathe with your nose helps keep you from getting a dry throat, which is common for divers who have long duration dives.