The MSR Guardian Prefilter Replacement is a new prefilter for your MSR Guardian Purifier. Whether your old one was damaged or just worn from months in the backcountry, this will get the Guardian working just like new. Includes the prefilter as well as the float so you'll be good to go after a quick install.
So sorry, but only 4 items are allowed for comparison, so we're comparing the first 4. I blame the gnomes and so should you.
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