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™ 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. Green Line: removes greater than 99% of bacteria, Cryptosporidium, Giardia, chlorine, bad tastes and odors.|*Antimicrobial technology does not protect users against food borne or disease causing bacteria, viruses, germs or other disease causing organisms.