"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 for the removal of virus, bacteria, Cryptosporidium and Giardia, for 120 gallons of use in the field.
Aquamira Series IV connectivity allows you to customize any Series IV system (such as the Frontier Max) for use in emergencies, international travel, or backcountry. The ultralight cartridge dramatically extends your filtration capabilities with less than 1 oz. of added pack weight.
For the optimal hydration system, use a Series IV RED Line filter to fill the Frontier Max casing that came standard with your Geigerrig Hydration Pack. The pressurized engine will assist water through the virus filter making it the easiest filtration system on the planet."