Our Mares Abyss 52X Regulator features double Dynamic Flow Control (DFC), meaning a consistent flow of at will be provided at any depth, hence eliminating the need for adjustment as well as the fear of loss of air even when breathing from both primary regulators. The Mares Abyss 52X Regulator has a lightweight, comfortable mouthpiece that is partially metal which allows condensation to occur when diving, adding a slight bit of moisture into the air; gone are the days of dry mouth symptoms! The braided hose is able to be tied in a knot whilst still allowing you to breathe through it, however, would not recommend. This braided hose is proven to be up to three times stronger than the standard rubber hoses. If youre considering a new regulator dont pass the Mares Abyss 52X Regulator!