Easy to use and quick to work, the Katadyn Gravity BeFree 3.0L Microfilter is your ticket to clean water whether you're thru-hiking the AT or just camping  out for the weekend. It features a hollow fiber filter that can process up to 2 liters of water per minute, eliminating microorganisms like protozoa and bacteria. The 43mm wide-mouth opening makes for easy filling from lake, river, or tap, and the integrated bail handle and carry loop let you hang it while it filters. To clean the filter in the field, simply shake or swish the EZ-Clean Membrane to remove debris.