Ensure your Katadyn Explorer system continues to deliver safe, clean water with the Explorer Pro Virus Membrane Replacement Cartridge. Designed to reduce viruses, bacteria, and protozoa from freshwater sources, this replacement restores purifier performance and maintains smooth flow for reliable use in the field. Compact and lightweight, it’s an ideal pack‑friendly backup and can be installed quickly without any tools, keeping your water filtration system ready wherever your adventures take you.