This extra-large AutoFlow gravity filter system delivers 10 liters of clean water fast-all while you set up camp, prep dinner or relax. And its big capacity means fewer trips to the river to haul the water you need. Ultralight and supremely packable, it offers the luxury of pump-free group filtration for basecamps, scout troops, horsepackers and other backcountry groups. And just one 10-liter fill of the reservoir can supply 1-2 people with a whole day&';s worth of clean water. Effective Against: Bacteria (99.9999%), protozoa (99.9%) and particulate. Hollow fiber filter meets EPA standards and NSF Protocol P231 for removal of bacteria and protozoa. Fast: Uses gravity to filter 1.75 liters per minute, letting you multi-task at camp. Versatile: Separate hang strap and bag clip allow for easy hanging for maximum convenience. Rugged: Durable 3-dimmensional film reservoir with RF-welded seams and a 1000-denier flat base that resists wear-and-tear. Field-Maintainable: Sediment trap in bottom of bag; filter is easily cleaned on the fly, no tools required. Specs Size: 10 LTR Weight (Standard): 12 oz Weight (Metric): 0.34 kg Width (Standard): 5 in Width (Metric): 12.7 cm Length (Standard): 12 in Length (Metric): 30.5 cm Height (Standard): 3 in Effective against bacteria: Yes Effective against chemicals/toxins: No Effective against particulate: Yes Effective against protozoa: Yes Effective against viruses: No Filter media: Hollow Fiber Filter pore size (microns): 0.2 Flow (L/min): 1.75 liters per min Cartridge life: 1500 liters Field cleanable: Yes Field maintainable: Yes Water Bottle Adapter: Yes Cartridge replacement indicator: Yes Material(s): Hollow Fiber Country of Origin: Made in the USA of US and Imported Materials