3 ms·
The filter in the MSR Guardian water filter was the result of a DARPA research contract iirc. It’s unique on account of being able to filter out viruses (tradit
by centimeter 6y ago
The filter in the MSR Guardian water filter was the result of a DARPA research contract iirc. It’s unique on account of being able to filter out viruses (traditional filters can’t go that small) and also has some benefits like being freeze-proof.