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MSRMiniWorks Ex Water Filter

MSRMiniWorks Ex Water Filter

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4.5 out of 5 stars
112 Reviews

MiniWorks Ex Water Filter

Filter your water year after year with the MSR MiniWorks Ex Water Filter. Clean this lightweight, compact filter back to like-new condition, without any disassembly tools. The MiniWorks' ceramic element ensures long-lasting protection against bacteria, protozoa (including crypto and giardia), and particulate, and the carbon core removes yucky tastes. MSR's little wonder (7.5 x 2.75in) can filter up to 1 liter per minute. As a bonus, the MiniWorks Ex Water Filter screws onto a standard Nalgene bottle or any MSR dromedary bag.


  • MSR's best-selling micrfilter known by backpackers for longevity
  • Marathon EX carbon/ceramic element ensures clean, tasty water
  • AirSpring Accumulator delivers one liter of water per minute
  • Field cleanable without any tools
  • Includes filter, hoses, stuff sack, hose float, scrub pad, and instructions
  • Made in the USA of US and imported materials
  • Item #CAS0479

Tech Specs

Purifying Element
Marathon EX (carbon/ceramic)
particulate, bacteria (99.9999%), protozoa (99.9%), chemicals, toxins
Marathon EX (carbon/ceramic)
Pore Size
Cartridge Life
AirSpring Accumulator (pump)
Field Cleanable
filter, hoses, stuff sack, hose float, scrub pad
2.75in x 7.5in
Claimed Weight
backpacking, camping, paddling trips
Manufacturer Warranty
limited 3 years

Overall Rating

4 based on 112 ratings

Review Summary

5 Stars - 61 reviews
4 Stars - 31 reviews
3 Stars - 9 reviews
2 Stars - 9 reviews
1 Stars - 2 reviews

Fits Small

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Runs smallTrue to sizeRuns large

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