Award-winning LifeStraw has been used by millions around the globe since 2005;Removes minimum 99.9999% of waterborne bacteria (>LOG 6 reduction) and surpasses EPA standards for water filters;Removes minimum 99.9% of waterborne protozoan parasites (>LOG 3 reduction) and filters to an amazing 0.2 microns;Filters up to 1000 liters of contaminated water WITHOUT iodine, chlorine, or other chemicals;Comes in a sealed bag, perfect for storing for emergencies