The MSR Aquatabs Water Purification Tablets are a 30 minute treatment for clean water. Ultralight for traveling internationally or heading into the backcountry, you'll get 30 tablets, which will treat up to 60L of water. Effective against viruses, bacteria and giardia cysts. You know, the gross stuff.
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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