MK2 EVO

For decades the classic downstream piston MK2 has been diving's go-to workhorse first stage. It is reliable, easy to use and won't put too big a dent in your pocketbook, and now it's more versatile than ever.

The new MK2 EVO comes with the patent-pending Extended Thermal Insulating System (XTIS) that lets you enjoy an ultra-fast breathing response and maximum airflow with minimal effort -- regardless of how cold the water is. The XTIS makes this possible by fully isolating the mechanical elements of the first stage from the cold, increasing freezing resistance by an average of 50 percent over the current MK2.

The MK2 EVO is also more compact than the standard MK2, yet has a bigger piston that pumps out 15 percent more airflow from a smaller package. So you can expect top-notch breathing performance whether you're reef diving in the warm Caribbean or wreck diving in the chilly Great Lakes.

• Classic downstream piston design features a chrome-plated brass body with one high pressure and four low-pressure ports.
• Patented XTIS (Extended Thermal Insulating System) fully isolates the mechanical elements from the cold, increasing freezing resistance by an average of 50% over its predecessor without compromising breathing performance.
• Additional internal technical improvements include a spring insulating bushing and coating, an insulating piston bushing, an insulating sleeve, and antifreeze cap, all of which contribute to the increase in freezing resistance.
• First stage is 3.5mm smaller than its predecessor but houses an oversized piston by 1.6mm that provides better breathing performance by increasing airflow by 15%.
• Stainless steel removable orifice allows for easier maintenance while extending regulator life.