The Mares Dual ADJ regulator is ultralight with adjustable breathing comfort. All this combined with the 62X, a first stage including a tri-material valve for the utmost reliability and safety, and dual DFC ports for the very best performance! The Mares Dual ADJ 62X Regulator is comprised of the compact top performer MR62X First Stage, all the features of the proven MR52X first stage and more, making it the best for a unique high caliber set up. Dual ADJ 62X represents a radical departure from any existing regulator. The Dual ADJ 62X incorporates a double DFC system that provides a consistent flow of air at any depth, even when breathing simultaneously from both the primary second stage and the octopus. The MR62X's pre-oriented pressure ports provide for an ideal placement of hoses even when using two independent regulators. All pearl chrome plated finished marine brass first stage regulator is a balanced diaphragm design which is environmentally sealed. The diaphragm membrane transmits the pressure changes to the internal mechanism eliminating the need for the surrounding water to enter the intricate mechanism. The benefit of this type of first stage design is that none of the internal parts are exposed to contaminants such as salt, sand, chlorine, or pool acids. These environmental contaminants cause corrosion and mineral deposits to form on the internal mechanism deteriorating regulator performance. The 62X first stage is also equipped with Auto Sealing Technology (AST) 1'st stage dry system. The MR62X uses A.C.T. Advanced Coating Technology. This patented technology created to optimize performance, safety, and reliability. The valve is covered with a hard Polyurethane (PU) and the sealing surface is a layered with a soft PU for a perfect seal. Tri-material (brass, soft PU and "heavy-duty" PU) reaches new levels of durability. The new valve is 600% more durable than its predecessor.