The 0.1 micron absolute hollow-fiber membrane filter removes 99.99999% of bacteria (e.g., salmonella, cholera, E. coli), 99.9999% of protozoa (like giardia and cryptosporidium), and 100% of microplastics. Paired with a durable, BPA-free, FDA-approved 2-liter TPU bladder with a wide mouth for easy filling, this system is both effective and convenient. The reusable Sawyer Squeeze Filter lasts up to 100,000 gallons, with thick fiber walls that enable rigorous backwashing. Weighing under 6 ounces, the system includes a cleaning coupling and plunger. Every Sawyer Filter is triple-tested for safety and can function as a squeeze filter or in a gravity setup. Product specs Kit Includes a A Sawyer Squeeze a Cnoc Premium 2 Liter Bladder a Cleaning Coupling a Cleaning Plunger