Chlorine dioxide is iodine and chlorine free

Long-Lasting: Leading-edge hollow fiber cartridge treats up to 10

1 choice on expeditions worldwide

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Aquamira Frontier Max Replacement Filters Filter Type:Virus (Worldwide) Chlorine dioxide is iodine andTake your adventure further without worry about contaminated drinking water. Use the Series IV RED Line filter or Bacteria filter (GREEN) in any Series IV system (such as the Frontier Max) for protection from the worst water you can find in any situation. Worldwide Replacement Filter (Virus): The Series IV RED Line filter is the most most powerful filtration available on the market today. This filter is certified by IAPMO to EPA and NSF ANSI standards