You cannot breathe directly out of a scuba tank because of the high pressure. A regulator reduces pressure to safe a level that can be inhaled by the diver. A diving regulator has two parts: the First Stage reduces the tank pressure and connects it to the Second Stage which contains the mouthpiece for breathing
A top-of-the line, fully adjustable regulator that joins the existing Legend LX. The Twilight Legend LX includes a smaller Comfo-Bite mouthpiece and a lighter second stage to reduce jaw fatigue, the revolutionary Master Breathing System (MBS) for simple breathing comfort control, and its own regulator bag for safe and stylish storage.