FILTERS OUT CONTAMINANTS: the Membrane microfilter protects against Bacteria (including E.coli + Salmonella), Parasites (including Giardia and Cryptosporidium), Microplastics, sand, dirt, and cloudiness. IMPROVES TASTE: the Carbon filter reduces chlorine, odors + organic chemical matter. LONG LASTING: The membrane microfilter lasts up to 1,000 gal (4,000 L) – about five years of daily use. Carbon filter lasts up to 26 gallons (100 L) – about two months. SAVES WASTE: The membrane microfilter lasts the equivalent to 8,000 single use plastic water bottles.