The extra-large MSR AutoFlow gravity filter system delivers 10 liters of clean water fast while you set up camp, prep dinner or relax. Its big capacity means fewer trips to the river to haul the water you need.

Similar in packable size to a 4L system, its durable flat base doubles the water volume for only 12 oz of total weight. You get pump-free group filtration for basecamps, scout troops, horsepackers and other backcountry groups. 

Specs

• 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
• Uses gravity to filter 1.75 liters per minute, letting you multi-task at camp
• Separate hang strap and bag clip allow for easy hanging for maximum convenience
• Durable 3-dimmensional film reservoir with RF-welded seams and a 1000-denier flat base that resists wear-and-tear
• Field-maintainable with sediment trap in bottom of bag; filter is easily cleaned on the fly, no tools required
• Includes water bottle adapter and cartridge replacement indicator