The LifeStraw is designed for the back-country and will filter out 99.9999% of waterborne bacteria and 99.9% of waterborne protozoa. 

Chemicals, salt water, heavy metals and viruses will not be removed. 

If you were looking for a high capacity filter to remove viruses, the LifeStraw Mission and LifeStraw Family 1.0 remove 99.999% of viruses.

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