Amazon.comWater treatment products are in high demand for outdoor enthusiasts international travelers and relief agencies. Few are better for long-lasting continuous use however than the Katadyn Pocket water microfilter. Made of heavy-duty materials the Pocket features a silver-impregnated ceramic element thats effective against bacteria and protozoa even in extreme conditions. Unlike disposable filters the ceramic element can be cleaned several times even in the field. More importantly the element filters all microorganisms larger than 0.2 microns (0.0002mm) producing clear drinkable water no matter where in the world you are. The pump also includes an improved round pump handle for better ergonomics and an outlet hose that attaches to water containers with a single clip.The Pocket hails from Katadyns Endurance series a high-quality line of filters that produce up to 100 times more water than standard water filters. The Pocket is so tough in fact that its the first choice for extreme adventurers like Mike Horn. Plus its the only water filter with a 20-year warranty. Other features include a measuring gauge that indicates when you should change the filtering element a cushioned base that makes it easy to pump on all surfaces a prefilter and a carrying bag.Why Water Filtration Is ImportantThe World Health Organization (WHO) attributes 80 percent of all travel diseases to contaminated drinking water. Drinking water contains three groups of pathogenic microorganisms: viruses such as hepatitis A Norwalk virus or poliovirus; bacteria like e-coli salmonella and cholera; and protozoans such as giardia and cryptosporidium. Tap water and ice cubes are usually the culprits when traveling but even bottled water can be questionable. The backcountry is also a source of waterborne illness. A pristine stream may be safe one day and contaminated the next as microorganisms stemming from human and animal waste are typically spread by rain and runoff. As a result the U.S. Center for Disease Control and Prevention recommends treating water from every source in the backcountry.Specifications: Usage: 1 to 4 people Capacity: 13000 gallons Dimensions: 2.4 by 10 inches Output: 1 quart per minute Technology: 0.2-micron ceramic depth filter (cleanable) Weight: 20 ounces About KatadynThe Switzerland-based Katadyn has been producing high-quality portable water systems since 1928. Katadyn products are used by militaries health organizations and outdoor adventurers worldwide making it the global leader in portable water treatment. With subsidiaries in the U.S. Germany France and Singapore Katadyn products are used wherever safe drinking water isnt available whether for travel camping or humanitarian applications.Product DescriptionFor over 30 years the Katadyn Pocket Microfilter has been the top choice water filter for emergency preparedness professional-use and militaries globally. Engineered with the highest quality construction; it can handle the most rugged conditions. The 0.2 micron silver-impregnated ceramic filter element can lasts an impressive 50000 liter depending on water quality.