Extremely scratch and corrosion resistant, the Black Tech coating protects and lends a technical look to the first stage.
Air-balanced flow-through piston provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
Patent-pending XTIS (Extended Thermal Insulating System) fully isolates the mechanical elements from the cold, increasing freezing resistance 30 percent over the current MK25 without compromising breathing performance.
New spring insulating coating, body insulating bushing (non-metal cylindrical interface separating the metal parts), anti-freeze cap, bigger body and cap thread all work in concert with the XTIS to improve cold-water performance.
Anti-freeze protection radically increases breathing reliability when diving in the most extreme water temperatures.