Ocean Reef Neptune III PackageNEPTUNE III PACKAGE The most advanced Full Face Mask for a modern, safer and more natural way of Scuba Diving. COMFORT. SAFETY. SMOOTH BREATHING. Neptune III provides smooth breathing at any depth. It extends field of vision considerably, removes impediment in lateral movement, features a double coated visor certified as a system to new EN250 standards. MOST ADVANCED BREATHING TECHNOLOGY. The new 2nd Stage is now fully and easily detachable (only