The Katadyn® Vario Water Filter is a premium drinking water system that combines the benefits of easy operation, high water output, and extended cartridge life. The Vario™ is an all-conditions microfilter with field maintainable features that allow you to get your filter up and running again in a pinch. Its dual-piston technology provides maximum output with minimum effort. Another impressive feature is the ability to adjust the filter stages for varying water conditions.