Mares Proton Ice Extreme Regulator
The regulator for the most demanding professional divers Even if all Mares regulators are certified for cold water dive, Proton Ice Extreme is accessoried with CWD kit to grant unbeatable reliability. Thanks to second stage case and key-components with fluoropolymer resin finish, Proton Ice Extreme is THE regulator for extreme cold water dives. Daily used by many Mares partners during diving under the ice. Tested and approved by U.S. Navy for use in water temperatures as low as 29 ?F /-1.7 ?C.