The MSR Guardian Filter is the most advanced filter on the market, but it won't work if it's clogged full of sticks, leaves, and dirt. The Guardian Prefilter Replacement Unit keeps larger debris from getting sucked up the intake hose and jammed into the filter, so you can keep the Guardian working efficiently for its full 10,000-liter life without needing to replace the hollow fiber filter.
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Manufactured by MSR
MSR Guardian Prefilter Replacement ships and sold by Backcountry
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The North Cascades have long been known as the North American Alps. Characterized by rugged beauty, this steep mountain range is filled with jagged peaks, deep valleys, cascading waterfalls and glaciers. North Cascades National Park Service Complex contains the heart of this mountainous region in three park units which are all managed as one and include North Cascades National Park, Ross Lake and Lake Chelan National Recreation Areas.
Badgers are animals of open country. Their oval burrows (ten inches across and four to six inches high) are familiar features of grasslands on sandy or loamy soils of the eastern plains or shrub country in mountain parks or western valleys.