This gravity-powered camping essential features two-stage purification — a .02 micron hollow fiber technology removes viruses, bacteria, protozoa and particulates. It also features activated carbon to reduce chemicals, tastes and odors. It weighs 18.7 ounces, features a 10-liter collection bag that fills easily at both sinks and wild sources, and has a flow are of one liter every two minutes. $249.95
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