The MINI filter removes 7 log (99.99999%) of bacteria (like salmonella) as well as other harmful bacteria which causes cholera and E. coli and 6 log (99.9999%) of protozoa such as giardia and cryptosporidium. These removal rates equal or exceed other filter options. EPA guidelines allow ten times more protozoa left in the water than Sawyer MINI filters allow. The MINI also filters out 100% of microplastics. The MINI 0.1 micron absolute filter houses a cluster of micro-fibrous tubes which use similar technology found in medical dialysis. As water passes through the side walls of the tubes, harmful bacteria and protozoa are trapped on the outer walls so you can be confident your water is safe to drink. SPECIFICATIONS Dimensions (in) 1.35 x 5.35 x 1.35 inches Removes bacteria, protozoa, E. Coli, giardia, vibrio cholerea, Salmonella typhi, & microplastics Technology Hollow fiber Weight (oz) 2