Katadyn Explorer Virus Membrane Replacement Cartridge is a high-capacity replacement filter cartridge that keeps your Katadyn Explorer Pro water filter performing reliably on extended trips. The cartridge is designed for straightforward maintenance and helps restore effective filtration when your current element is worn or clogged. Replacement filter cartridge made specifically for the Katadyn Explorer Pro water filter Helps bring back dependable water filtration performance in the field Rated to filter up to 10,000 liters depending on water quality Practical choice for expedition use and long-term preparedness