The HydraPak 28mm PNP Inline Filter transforms your hydration experience, providing access to clean drinking water wherever your adventures take you. This innovative filter allows you to convert your reservoir or water bottle into an effective water purification system. Its lightweight and versatile design makes it ideal for backcountry expeditions. With compatibility across HydraPak 28mm bottles and Plug-N-Play connectors, this filter efficiently removes harmful bacteria and microplastics, ensuring safe hydration while you explore the great outdoors.HydraPak 28mm PNP Inline Filter Features: Access drinking water anywhere: Convert your reservoir or water bottle into a water filter. Lightweight: Weighs only 47g (filter only). Fast filtration: Filters approximately 1,500 litres of fresh water at a rate of >1L per minute. Versatile compatibility: Works with all HydraPak 28mm opening bottles and flasks, as well as Plug-N-Play connectors on reservoirs and water storage containers. Effective removal: Eliminates common waterborne bacteria, such as E. coli (99.99%). Parasitic cyst removal: Removes parasitic cysts (99.99%) per EPA Guide Standards and NSF P231. Microplastics filtration: Filters out microplastics (99.99%) per NSF 42, greater than or equal to 3.0 microns in size. Diameter: 34mm. Length: 129mm. Materials: Made from PP/POM, EPDM, Silicone, and Hollow Fiber. Product includes: Filter, Cap Adapter, and Backflush Adapter.