MSR Miniworks EX

The MiniWorks EX microfilter is the worldwide best-selling microfilter, delivering long-lasting, field-maintainable water filtration in demanding environments. Engineered for frequent and heavy use, it utilizes our workhorse Marathon™ EX carbon/ceramic element to ensure clean, reliable and taste-free water. Thanks to its innovative AirSpring Accumulator™, it’s capable of pumping one liter per minute and the flow rate can be renewed easily and repeatedly in the field—no tools required. It’s lightweight and compact and, most importantly, been proven reliable by thousands of adventurers just like you.

Reliable: Durable carbon/ceramic element ensures safe, taste-free water—even with frequent, heavy use.
Field-maintainable: Can be cleaned repeatedly for full filter recovery with no tools required.
Fast Flow: AirSpring Accumulator™ increases filtration speed; up to 1-liter per minute.
Better-tasting Water: Carbon core removes unpleasant tastes and odors caused by organic compounds, such as iodine, chlorine, and pesticides.

Effective against protozoa Yes
Effective against bacteria Yes
Effective against viruses No
Effective against particulate Yes
Effective against chemicals/toxins Yes
Weight 1 lb / 456 g
Width 2.75 in / 7 cm
Length 7.5 in / 19 cm
Filter media Ceramic Plus Carbon
Filter pore size 0.2 microns
Flow (L/min) 1 liters per min
Flow (strokes per liter) 85
Cartridge life ~2000 liters
Field cleanable Yes
Field maintainable Yes
Country of Origin Made in Seattle, USA
Mechanical advantage Yes
Water Bottle Adapter Yes
Cartridge replacement indicator Yes