Let nature do all the hard work! Simply fill it, hang it, and forget it. Harness the power of gravity and let the AutoFlow clean up to 1 1/2 liters per minute.
BIG 4-liter reservoir allows you to fill large quantities at once, making it the perfect choice for group outings. Quick and easy maintenance, too, for longer expeditions.
Clean, pure, safe:
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MSR® AutoFlow Gravity Filter
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