Mares Proton Ice Extreme Mares Proton Ice Extreme
-Approved by the United States Navy for dives at extremely low water temperatures, down to -1.7 °C / 29 °F
-Equipped with the revolutionary tri-material valve
-All-metal second stage
-Entire 2nd stage case and all key components coated with fluoropolymer resin finish
-Accessorized with the CWD kit
-Available in an Octopus version