With the HydraPak 28mm PNP Inline Filter, you get a new must-have in the field of water treatment. Its intuitive plug-and-play system fits standard bottles and reservoirs. No matter where you are, nothing stands in the way of quick and effective filtration. The filter reliably removes 99.99 percent of all E. coli and parasite cysts, allowing you to quench your thirst safely and healthily. Its impressive performance does not come at the expense of usability. Weighing only 47 grams and measuring 129 millimeters in length, the filter is lightweight and compact, fitting easily into any luggage.