MSR® Guardian? - Advanced water purification Product News

MSR Guardian ISPO Award, 115 kb
In 2009, the U.S. military selected MSR (Mountain Safety Research®), the Seattle-based manufacturer of high-performance outdoor equipment and the leader in backcountry water treatment technology, to create a device capable of keeping its service members safe from waterborne illnesses virtually anywhere on earth. After six years of research and development with MSR’s in-house Water Laboratory and in collaboration with the U.S. military (Army and Marine Corps), MSR created the solution: the Guardian Purifier.

Built for international travelers, outdoor recreationalists, and emergency preparedness, the military-grade microbiological purifier is the world’s most advanced portable purifier. It’s capable of transforming even the most challenging water sources into clean, microbiologically safe, drinkable water.

Unlike conventional purifiers, the Guardian uses custom-engineered, medical-grade hollow fiber technology to block the tiniest waterborne microbial pathogens. The pump physically removes viruses, protozoa, bacteria, and particulates at a rapid 2.5 liters per minute—with no chemicals, UV light, pre-filtering, or waiting—for up to 10,000+ liters.

With the Guardian, users no longer have to be intimidated by field maintenance, product vulnerabilities in various water types, and user error. Thanks to its patent-pending design, the purifier self-cleans, never requiring users to back flush or to scrub filters in the field to maintain flow.

Originally built for U.S. military squads, the Guardian meets NSF Protocol P248, the standard used to test U.S. military purifiers for removing viruses, bacteria and protozoa in water abundant with silt and particulates. Its rugged design withstands heat up to 160°F, freezing temperatures, drop testing (up to 6 feet to concrete as conducted by MSR’s world-renowned, in-house water research lab), and up to 300 pounds of crush force. 

The MSR® Guardian is available now in selected retailers. For more information visit


Price: £295.00

Weight: 490 grams

For more information visit
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