Field-maintainable: Filter can be cleaned repeatedly for full flow recovery with no tools required.Reliable: Filter’s durable ceramic/carbon element ensures safe, taste-free water-even with frequent, heavy use.The MiniWorks is one of the most cost-effective portable treatment devices currently available. In general, the more turbid (cloudy) the water, the more frequently your filter will require cleaning and eventually replacement. Each tablet treats up to 2 quarts of water depending on conditions. Please note that water quality varies a lot with the season and water source. Includes 50 individually packaged tablets. Iodine-Free: Aquatabs tablets inactivate viruses without bad-tasting iodine.EPA drinking water standards* and NSF protocol P231 testing standard. Effective Against: Viruses (99.99%), bacteria (99.9999%), protozoa (99.9%) and particulate. The MiniWorks EX microfilter is the worldwide best-selling microfilter, delivering long-lasting, field-maintainable water filtration in demanding environments.Together they provide the most reliable water possible in a compact, lightweight system that’s great for backpacking and international travel. When viruses are a concern, the chlorine-based Aquatabs® purification tablets add viral defense. MSR MiniWorks EX Water Purification System. The long lasting ceramic filter element filters down to 0. Buy the MSR MiniWorks Ceramic Filter and more quality Fishing, Hunting and Outdoor gear at Bass Pro Shops. 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. MSR Miniworks EX Microfilter Water Filter - There is good reason why the MSR Miniworks EX water filter is the worlds best selling microfilter. Get the added viral protection that’s critical in popular wilderness areas and developing countries with this comprehensive purifier and microfilter system.