MK17/S555 regulator system combines the air-balanced valve technology of the S-Series second stages with the sturdiness and excellent air flow of our top diaphragm first stage.
The ease of use of the S555 and its durability make it a suitable companion for the MK17, designed to perform in harsher environments. A system for any situation, coupling advanced breathing performance with maximum reliability.

• MK17’s dry ambient chamber ensures protection from the cold.
• S555’s balanced flow valve provides constant and effortless air flow.

All this, and a captivating design.