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MSR MiniWorks EX Microfilter

Item # MSR356300

Availability: In Stock!

Orders placed in the next 1:17 hours ship today!

Availability: In Stock!

Orders placed in the next 1:17 hours ship today!
The MSR MiniWorks EX is versatile enough for day hikes or extended trips. This field-maintainable microfilter packs small and light.


The MSR MiniWorks EX is versatile enough for day hikes or extended trips. With its AirSpring accumulator, the MiniWorks can pump 1 liter of water per minute.

The MiniWorks EX is field-maintainable. The durable ceramic element pumps water for years and can be cleaned repeatedly for full recovery, with no tools required for disassembly. This maintainability ensures the reliability you need in remote backcountry situations.

The MiniWorks EX is effective against bacteria and protozoa such as Cryptosporidium and Giardia, and also removes tastes and odors.

The MiniWorks EX weighs 16 oz and measures 7.5 in x 2.75 in.

The kit includes: microfilter unit, hose float, scrub pad, stuff sack and instructions.

  • Long-lasting: Durable ceramic element ensures protection and will pump water for years.
  • Field-maintainable: Can be cleaned repeatedly for full filter recovery; no tools required for complete disassembly.
  • Fast Flow: AirSpring Accumulator increases filtration speed; up to 1 liter/minute.
  • Effective Protection: Removes bacteria, protozoa (including crypto and giardia), and particulate.
  • Better-tasting Water: Carbon core removes unpleasant tastes and odors caused by chemicals, such as iodine, chlorine, and pesticides.


Best Use Backpacking, Hiking
Removes Giardia; Cryptosporidium; Bacteria; Taste
Item Weight 16.3 oz.
Flow Rate 1 Liter per minute
Field Maintainable Yes
Filter Material 0.2 micron Ceramic
Dimensions 7.5 x 2.75 in.

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great quality filter

Likes: light and small, tested it out and the water taste great.

Dislikes: none so far

Reviewed by Mardy K - July 23, 2015
good product

Likes: It always give you clean and good tasting water.
Easy to pull apart to clean.

Dislikes: It's a bit heavy for backpacking.
Expensive to replace the filter.

Reviewed by Paul D. - July 14, 2015

Likes: Easy to use!

Dislikes: The bag it comes in has mesh on one side--- great for storage, but in my pack I end up with little dribbles. Ended up using a ziplock Baggie to prevent my things from getting water on them.

Reviewed by Inside Edge M. - October 7, 2014

Likes: Small / light weight.

Dislikes: Pump type.

Reviewed by Inside Edge M. - April 17, 2014

Likes: Works awesome when clean and used with a relatively new ceramic filter. Had it for about a year and took it on a trip and it began clogging and taking FOREVER to filter water. After replacing the ceramic filter, it worked like new again. Fills about a 32 oz bottle in 2-3 minutes when clean.

Dislikes: Ceramic filters are a bit expensive.

Reviewed by Nathan D. - December 27, 2013

Likes: Its the only one I've ever used. I have nothing to compare it too. Amazing how it produces such nice clean water out of Lake Superior. Worked great.

Dislikes: You will be lucky if you can filter 1 liter of water a minute. I kept my filter clean and it took 2x that long. No complaints though.

Reviewed by Mark K. - December 12, 2013

Likes: It can be serviced in the field. Long filter life.

Dislikes: A little on the heavy side.

Reviewed by Inside Edge M. - August 30, 2013

Likes: Relatively simple to use.

Dislikes: The handle is a little flimsy when trying to pump the water.

Reviewed by Marcie C. - June 22, 2013

Likes: The life of the filter and the fact that it is easily cleaned/maintained are what sold me on this filtration system. It is well built, made from durable materials and easy to use. Very simple design. Also mates with most bottles.

Dislikes: Weight is something of a negative, but not killer. This is essential gear. Willing to sacrifice a little here for dependability. Had the Platypus filter had the same kind of life, I probably would have gone that route - that's as simple as simple gets.

Reviewed by Inside Edge M. - June 1, 2013

Likes: Bought this for my son in Germany. He is planning on biking and camping in Europe. I already have MSR MiniWorks EX Microfilter and love it. Works really great and nice to have with you when the water is in question..I also bike and camp but in the United States. Wouldn't go out without it..

Dislikes: I don't have any complaints at this time.

Reviewed by Roger F. - April 17, 2013