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MSR TrailShot Replacement Cartridge



Compact filtration on the trail.

The MSR TrailShot Replacement Cartridge serves as a replacement to your TrailShot Microfilter, restoring flow rates after your previous filter cartridge is spent. This replacement cartridge filters up to 2000 liters of water before requiring a replacement and cleans one liter of water in as little as 60 seconds. It eliminates harmful contaminates, including bacteria, protozoa, and suspended particulates found in many lakes, streams, and waterways.

  • Replacement cartridge for TrailShot Microfilter
  • Filters out bacteria, protozoa, particulates
  • Lasts up to 2000 liters of water filtration
  • Cleans one liter of water in only 60 seconds
  • Includes cartridge, required parts, instructions
  • Item #CAS009P

Purifying Element
hollow fiber technology
bacteria, protozoa, particulates
Cartridge Life
2000 liters
Field Cleanable
yes, shake to clean
TrailShot Cartridge, replacement parts, instructions
Recommended Use
hiking & camping, backpacking, ultralight backpacking
Manufacturer Warranty
limited 3 years

Tech Specs

California Proposition 65


This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer. For more information go to

What do you think about this product?



Can I get the replacement spout? While filtering water during a 3 day backpacking trip, the spout ejected ans disappeared down river. Needless to say, this was a scary situation, and could only get about 1/3 the normal water flow without the black spout part.