The ultra light and compact Aquamira Frontier Emergency Filter easily slips into a day pack, shirt pocket or travel luggage and is always ready when you need it. Use the Frontier Filter to drink from any bottle, cup or directly from water sources. FILTRATION TECHNOLOGY All Aquamira filter systems use the "torturous path" method of filtration, designed to provide greater effectiveness than common thin-walled fiber filters. The tiny intricate pathways in the filter trap 99.9% of harmful Cryptosporidium, Giardia, and other pathogens, including waterborne insect larvae and many bacteria such as E. Coli. The activated carbon reduces waterborne chemicals and improves water taste while Miraguard® Antimicrobial technology suppresses the growth of bacteria, algae, fungus, mold and mildew within the filter media. Removes >99.9% of Giardia & Cryptosporidium Capacity = 20 gallons (75.71 Litres) Weight: < 1 ounce (< 28.35g)