Refill your Geigerrig Pressurized Hydration Engine from a river, stream, lake or pond. This plug-n-play, in-line water filter snaps directly into the Geigerrig Hydration Reservoir, with the drink tube snapping into the other end of the filter. Your Geigerrig Hydration Reservoir is already set up and ready for this filter. Refill from water found along the trail, pressurize the Geigerrig reservoir, and filter water as you go. The Geigerrig filter removes Giardia, Cryptosporidium, Bacteria, and Viruses. The top of the filter screws off, allowing you to remove the filter cartridge, clean out the filter, and replace the cartridge. Replacement filter cartridges are available for purchase. Filtration Technology incorporates a unique combination of the most advanced filtration techniques and media science. This design and manufacturing method has been thoroughly tested and certified by independent laboratories to consistently remove protozoan cysts, bacteria, and virus to ANSI/NSF Standard 52, and US EPA standards without the use of disinfecting chemicals such as chlorine, bromine, or iodine. BVR Mixed Media filters provide high flows and long service life in the most compact, lightweight cartridge available today. BVR Filter Technology meets or exceeds ANSI/NSF Standard 53 for removal of Protozoan, Cysts, Bacteria, and Virus. Activated Coconut Shell Carbon reduces waterborne chemicals, improves taste and eliminates offensive odors. Suppresses the growth of bacteria, algae, fungus, mold and mildew within the filter media. Protozoan Cysts (Cryptosporidium): Greater than or equal to 99.9% Per ANSI/NSF 53. Virus (MS-2 Bacteriophage): Greater than or equal to 99.9999% Per ANSI/NSF 53. Chlorine Removal: Greater than or equal to 99.99% Per ANSI/NSF 53. Meets or Exceeds ANSI/NSF 42. 100 gallons / 378 L. 5.75 inches long X 1.5 inches in diameter. Super light-weight