Get even more clean water for your adventures with the Sawyer Dual-Threaded Mini Filtration System! Triple-tested during manufacturing and weighing just 2 oz., each 0.1-micron inline filter removes 99.99999% of bacteria, such as salmonella, cholera, and E. coli; 99.9999% of protozoa, such as giardia and cryptosporidium; and 100% of microplastics to ensure safe drinking water up to 100,000 gal. Sturdy membranes withstand backwashing. Plus, 28mm threading on both sides of the filter allows you to attach it to drinking pouches, standard disposable water bottles, hydration packs, and more. This Sawyer filtration system includes 2 dual-threaded mini filters and 2 cleaning plungers. Includes two 0.1-micron inline filters Triple-tested during manufacturing Weigh just 2 oz. each Removes 99.99999% of bacteria, 99.9999% of protozoa, and 100% of microplastics Sturdy membranes withstand backwashing 28mm threading on both sides allow you to attach to a variety of bottles, packs, and more 2 cleaning plungers included