The MSR Guardian makes for a great group water filter

Yahoo Finance: Backpacker: The 7 Best Backpacking Water Filters

The MSR Guardian makes for a great group water filter

Yahoo Finance: Backpacker: The 7 Best Backpacking Water Filters

Yahoo Finance: Backpacker: The 7 Best Backpacking Water Filters

Yahoo Finance: Backpacker: The 7 Best Backpacking Water Filters

Yahoo Finance: Backpacker: The 7 Best Backpacking Water Filters

Yahoo Finance: Backpacker: The 7 Best Backpacking Water Filters

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