Compact Backcountry Water Purifier System

In 1969, Seattle engineer and lifelong mountaineer Larry Penberthy founded Mountain Safety Research (MSR) as a one-man crusade dedicated to improving the safety of climbing equipment. This simple belief – that better, safer, and more reliable gear is the key to unlocking greater adventures – still drives the MSR team today.

MSR has always been a company of engineers, inventors, and unruly dreamers. Whether it's defying the status quo in equipment design or radically shifting the social mindset, the company believes the greatest innovations and explorations are inspired by the world's unruly dreamers.

Designing for Durability and Longevity is a top priority at MSR. The brand builds products to last, offering outdoor enthusiasts more adventures and reducing waste. Extensive in-house and field testing ensures MSR's products can withstand the rigors to which customers subject their gear. Customers often share stories of using MSR stoves from the 1980s, testament to the brand's commitment to quality.

MSR's water treatment products exemplify this focus on reliability and performance. The MiniWorks EX Purifier System, for instance, features a durable carbon/ceramic element that ensures safe, taste-free water even with frequent, heavy use. Effective against viruses (99.99%), bacteria (99.9999%), protozoa (99.9%), and particulate, it meets U.S. EPA drinking water standards and the NSF P231 testing protocol. Unlike iodine-based treatments, the included Aquatabs tablets inactivate viruses without unpleasant taste.

Field-maintainable with no tools required, the MiniWorks EX allows users to clean the filter repeatedly for full flow recovery. This attention to durability and ease of use is echoed across MSR's water treatment lineup, from fast-and-light microfilters to gravity-powered systems.

MSR's commitment to safety is underpinned by scientific rigor. The brand invests in an on-site water lab with staff scientists, individually testing each device to ensure greater safety and usability. Features like an integrity check and end-of-life indicator set MSR apart, allowing users to confirm proper function and know when it's time to replace the cartridge.

Whether it's tents, stoves, cookware, or snowshoes, MSR's products are designed and manufactured to the highest standards, inspiring adventurers to explore the great outdoors with confidence in their gear.

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