CONVENIENT
Microfilter utilizes Hollow Fiber Technology and advanced engineering to make water treatment highly mobile and easy to use.

VERSATILE
Ergonomic design, diminutive size and tool-free maintainability make it just as appropriate on day trips as it is on multi-day excursions. Quick-Connect bottle adaptor allows direct connection to all MSR hydration products and a variety of other "wide mouth" containers.

EFFICIENT
Hollow fiber filter with 0.2-micron pores, effective against protozoa, bacteria, and particulate; three liters per minute flow and 20 strokes per liter of water.

WARRANTY
Limited lifetime manufacturer’s warranty.

WHY USE MOUNTAIN SAFETY RESEARCH?
MSR has always been a company of engineers, inventors and unruly dreamers. Larry Penberthy started the company in 1969 on a personal crusade against unsafe equipment. Today, we’re still an intrepid team obsessed with creating the most reliable, high-performance gear possible.

Whether it’s defying the status quo in equipment design or radically shifting the social mindset, we believe the greatest innovations—and explorations—are inspired by the world’s unruly dreamers.