Get the added viral protection that's critical in popular wilderness areas and developing countries with this comprehensive purifier/microfilter system. The SweetWater Microfilter removes waterborne bacteria and protozoa, particulate, taste and odors, while the chlorine-based SweetWater Purifier Solution effectively inactivates viruses. Together they provide the most reliable water possible. It pumps easily with a 4:1 mechanical advantage, producing 1L per minute and can easily be cleaned in the field without tools to restore flow rates. This system meets U.S. EPA requirements for microbiological water purifiers.