The Katadyn Guide Replacement Cartridge is the replacement element for the Katadyn Guide Water Filter. It now comes with a 50 micron membrane to filter out particles larger than 50 microns. It's always a good idea to pack a second element when you head to the backcountry.
Bottom Line: It's always a good idea to pack a second element when you head to the backcountry.
Review 'Katadyn Guide Water Filter Replacement Cartridge'
