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.
Options, sizes, colors available on Backcountry
Manufactured by MSR
MSR Guardian Prefilter Replacement ships and sold by Backcountry
Price subject to change
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The bighorn sheep is the mammalian symbol of Colorado Parks and Wildlife and Colorado's official animal. Colorado is home to the largest population of the species anywhere. The animals are five to six feet long with a tail three to six inches in length.