The best-selling filter on the market, delivering long-lasting, fully field-maintainable water filtration. The MiniWorks EX microfilter is the worldwide best-selling microfilter, delivering long-lasting, field-maintainable water filtration in demanding environments. Engineered for frequent and heavy use, it utilizes our workhorse MarathonEX carbon/ceramic element to ensure clean, reliable and taste-free water. Thanks to its innovative AirSpring Accumulator, it's capable of pumping one liter per minute and the flow rate can be renewed easily and repeatedly in the field - no tools required. It's lightweight and compact and, most importantly, been proven reliable by thousands of adventurers just like you.