MSR Guardian™ replacement cartridge for water purifier

The MSR Guardian™ Replacement Cartridge keeps your MSR Guardian water purifier in pristine condition. It's easy to install, so you can quickly replace it when your pre-filter is worn or damaged. Plus, the float is self-righting, meaning you'll get clean, pure water every time, taken only from the cleanest spot below the surface! So don't worry if your filter is worn out. Just replace it with an MSR Guardian™ replacement cartridge and you'll be back up and running in no time!