Protects against 99.999999% of bacteria (including E.coli, Salmonella), 99.999% of parasites (including Giardia and Cryptosporidium), 99.999% of microplastics, silt, sand, and cloudiness Enhanced microfilter performance: Our re-engineered membrane and custom backwash accessory means better performance against sand and silt, maintaining great flow over the long haul Ultra-compact, our reconfigured filter is tiny but mighty and doesn’t sacrifice weight or space Use with the collapsible squeeze bottle, gravity water filter system or as a standalone straw Your purchase has impact: one purchase, one child, one year of safe water