Aquamira Frontier Pro ultralight water filter has all the benefits of a larger filter in a compact size. Straw style filter attaches directly to water bottles, bladders, or gravity flow systems. Replaceable Green Line bacteria filter with up to 500 ml/minute flow rate. Miraguard?äó Antimicrobial* Technology suppresses the growth of bacteria, algae, fungus, mold, and mildew within the filter media. Includes 3 pre-filters to extent filter life. Wt: 2 oz. Filters up to 50 gallons.