Keep your Katadyn Be Free Water Filters flowing with the Be Free Replacement Cartridge. Works with Katadyn Be Free 0.6L, 1.0L and 3.0L Flasks. Here is protection you can trust with the 0.1 micron water filter that removes harmful organisms like bacteria 99.9999% and protozoa like Giardia & Cryptosporidium 99.9%, surpassing EPA standards. The EZ-clean Membrane is simple and easy to clean by simply shaking or swishing the filter to clean debris, no back flushing or extra tools required. The Stay Clean Drink Nozzle keeps the mouthpiece clean and sanitary.