Katadyn 8011553 Extreme Purifier/MyBottle Accessory Cyst Filter (2-Pack Kit)

Cyst Filter replacement cartridge for Exstream Water Purification Bottles, and MyBottle Purifiers(not microfilters)

- Filters sediment and protozoan organisms such as cryptosporidia and giardia
- Package of 2 filters
- Change the ViruStat Cartridge after 200 refills.
- Change the Cyst and Pre/Post Filters when water flow becomes constricted.