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MSR MiniWorks Ex Microfilter - Outdoor Filter Review

The MSR Miniworks EX is a portable water filter designed to accompany you on your travels wherever you go.

The Miniworks is an affordable unit that's compact enough to take on most outdoor adventures to remove harmful organisms, particles and bacteria from water.

    What's Smart?

  • Field Maintainable
  • Reusable filter
  • Easy to pump
  • Easy to clean filter

    What's Not?

  • Some find it bulky
  • Users found it heavy
Suitable for: Base camp, backpacking, Hiking, Travel
Approx price: $90 US or less
Countries available: Worldwide (check with us or CascadeDesigns "MSR")
Brand: MSR

At First Glance

The Miniworks appears to be simple and straightforward to put together. Most of the parts are large enough to make them easy to keep track of when disassembling in order to clean when in the field.

The filter looks solidly built and durable. But, what do actual users think ?

Consumer Reviews For The Miniworks Ex

The majority of users liked the Miniworks Ex water filter giving it a 4 out of 5 star ratings on average at various review sites. Here are some of the comments that actual users made.

  • “I have used a lot of other filters this is the one I stuck with.” (Amazon review)
  • “Easy to clean in the field.” (Trailspace)
  • “I've used this pump on trips to China, Russia, India, S.E. Asia, S. America and right here in the good ole U.S.A. It works!” (REI review)

Here's what users liked and didn't like


    As one would expect from the high ratings given by users they found a lot of positive things about the Miniworks Ex including:

  • Easy to maintain
  • Easy to clean in the field
  • Good filtering
  • Easily attaches to Nalgene bottle
  • Angled pumping mechanism makes pumping easier
  • The reusable filter that can be cleaned easily


    There were actually only two consistently mentioned cons regarding this water filter. These were:

  • Bulky
  • Not lightweight

Ironically while a good number of people did find it heavier than expected about 50% of users felt it was lightweight. This means that the weight and bulkiness is going to be relative to the user.

Conclusion - Verdict

Most actual users of the MSR miniworks Ex say they would recommend it to others. While the price of this water filter is comparable to other's on the market, the reusable filter itself makes this product a great overall bargain.

Several users mentioned they have owned this filter for years finding it durable and long lasting.

The angled pumping mechanism makes pumping easier than most other pump water filtration systems and the product is compact enough to fit in a suitcase when traveling abroad or in a backpack when hiking or camping.

Overall it's worth the price tag, does its job very well, the pros outweigh cons, and the majority of users have nothing but good news for prospective buyers.

MSR Miniworks Ex Features and Specs.

The Miniworks EX is a pump water filter that comes with some handy features including:

  • Engineered for heavy use
  • Marathon Ex carbon/ceramic element
  • AirSpring accumulator (pumps 1 liter per minute)
  • Reusable filter
  • Field maintainable
  • Dimensions: (Length: 7.5 in / 19 cm) (Width: 2.75 in / 7 cm)
  • Weight: 1 lb / 456 g
  • Filter type:Ceramic/Carbon
  • Cartridge life: 2000 liters depending on water quality
    Ease of use
    How the water tastes
    Filter lasting
    Value for money

User Reviews And Ratings

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