Get the added viral protection that's critical in popular wilderness areas and developing countries with this comprehensive purifier and microfilter system. The MiniWorks Microfilter-our best-selling filter for demanding conditions-utilizes a ceramic/carbon element to filter out waterborne bacteria and protozoa, as well as particulate, taste and odors at 1 liter per minute. When viruses are a concern, the chlorine-based Aquatabs purification tablets add viral defense. Together they provide the most reliable water possible in a compact, lightweight system that's great for backpacking and international travel.