CamelBak: Reservoir Filter Kit filtered by LifeStraw® STAGE 1HOLLOW FIBER MEMBRANERemoves 99.999999% of bacteria (E. coli, etc.)Removes 99.999% of protozoa (Giardia Cryptosporidium, etc.)Removes 99.999% of microplasticsFilters 4,000 liters (1,000 gallons)STAGE 2ION EXCHANGE FILTERReduces chlorine and leadRemoves bad odor and tasteRemoves organic chemical matter (Pesticides, Herbicides)Filters 100 liters (25 gallons)