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MSRTrailShot Microfilter

MSRTrailShot Microfilter

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4 out of 5 stars
23 Reviews

TrailShot Microfilter

From ultralight backpacking trips to epic mountain bike rides, the MSR TrailShot Microfilter provides ultra-compact purification, allowing you to drink directly from streams and lakes on the trail. Tipping the scales at a mere 5.4 ounces, the TrailShot tags along in your pack without the bulk or weight of traditional water filters.

The one-handed pump action efficiently filters water of common contaminates, including bacteria, protozoa, and suspended particulates. When it's time to clean the filter itself, simply shake it a few times and get back to filtering water from the stream or lake. It treats up to 2,000 liters of water before requiring a replacement and cleans one liter of water in a mere 60 seconds.


  • Ultra-compact water filter for outdoor adventures
  • 5.4-ounce weight satisfies ultralight backpackers
  • One-handed pump action with shake-to-clean design
  • Filters out bacteria, protozoa, and particulates
  • Meets NSF Protocol P231 filtration standard
  • Treats 2000 liters before needing replacement
  • Filters one liter of water in 60 seconds
  • Item #CAS009O

Tech Specs

Purifying Element
hollow fiber technology
bacteria, protozoa, particulates
Cartridge Life
up to 2000L
one-handed pump
Field Cleanable
shake to restore flow
Claimed Weight
Recommended Use
hiking & camping, backpacking, ultralight backpacking
Manufacturer Warranty
limited 3 years

Overall Rating

3.5 based on 23 ratings

Review Summary

5 Stars - 11 reviews
4 Stars - 7 reviews
3 Stars - 0 reviews
2 Stars - 3 reviews
1 Stars - 2 reviews

Fits Slightly Large

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