LifeStraw Membrane Ultrafilters / Purifiers
The difference between microfilters and ultrafilters is the pore size – LifeStraw’s microfilters have a pore size of 0.2 micron while the ultrafilters have a pore size 10 times smaller: 0.02 micron. Both technologies work via the same mechanism, but ultrafilters (because of their smaller pore size) also remove virus (in addition to bacteria, parasites, microplastics and dirt/turbidity). Because of their smaller pore size, ultrafilters also often have a slower flow rate or require more pressure than microfilters. LifeStraw’s membrane ultrafilters are capable of removing 99.999% (log 5) of viruses, 99.999999% (log 8) of bacteria (including E. coli), 99.999% (log 5) of parasites (Giardia, Cryptosporidium, etc.), and 99.999% (log 5) of microplastics.