HydroBlu Virus Ultrafiltration Hollow Fiber Replacement Filter works through size exclusion. Dozens of hollow tubes have microscopic holes (0.02 microns) and act as a barrier to viruses such as Hepatitis A, Polio, Typhoid, and Enteroviruses. Additionally, in a similar way it blocks 99.999% of bacteria. Clean water is allowed to passthrough the holes while the large contaminants cannot fit through the holes. To clean the hollow fiber, simply rinse clean water through the opposite direction of the flow of water. This will push contamination and debris back out the inlet and will extend the life of the filter.
Features:

• Removes viruses such as Hepatitis A, Polio, Typhoid and Enteroviruses.
• Removes 99.999% of all bacteria, such as E.coli, salmonella, and cholera. It also removes 99.999% of all protozoan cysts, including giardia, cryptosporidium and other protozoa
• 0.02 Micron hollow fiber membrane
• Perfect for camping, travel and for emergency situations
• Flow rate of 1 gallon in 5 minutes